diff --git a/src/api/authenticate.ts b/src/api/authenticate.ts
index 537c3d1e1f..7b3983a838 100644
--- a/src/api/authenticate.ts
+++ b/src/api/authenticate.ts
@@ -55,10 +55,10 @@ export default (req: express.Request) => new Promise<IAuthContext>(async (resolv
 		}
 
 		const app = await App
-			.findOne({ _id: accessToken.app_id });
+			.findOne({ _id: accessToken.appId });
 
 		const user = await User
-			.findOne({ _id: accessToken.user_id });
+			.findOne({ _id: accessToken.userId });
 
 		return resolve({
 			app: app,
diff --git a/src/api/bot/core.ts b/src/api/bot/core.ts
index d6706e9a1c..9e699572de 100644
--- a/src/api/bot/core.ts
+++ b/src/api/bot/core.ts
@@ -208,7 +208,7 @@ class SigninContext extends Context {
 		if (this.temporaryUser == null) {
 			// Fetch user
 			const user: IUser = await User.findOne({
-				username_lower: query.toLowerCase(),
+				usernameLower: query.toLowerCase(),
 				host: null
 			}, {
 				fields: {
diff --git a/src/api/bot/interfaces/line.ts b/src/api/bot/interfaces/line.ts
index 8036b2fde4..dc600125c5 100644
--- a/src/api/bot/interfaces/line.ts
+++ b/src/api/bot/interfaces/line.ts
@@ -115,7 +115,7 @@ class LineBot extends BotCore {
 			actions.push({
 				type: 'uri',
 				label: 'Twitterアカウントを見る',
-				uri: `https://twitter.com/${user.account.twitter.screen_name}`
+				uri: `https://twitter.com/${user.account.twitter.screenName}`
 			});
 		}
 
@@ -142,7 +142,7 @@ class LineBot extends BotCore {
 
 	public async showUserTimelinePostback(userId: string) {
 		const tl = await require('../../endpoints/users/posts')({
-			user_id: userId,
+			userId: userId,
 			limit: 5
 		}, this.user);
 
@@ -174,7 +174,7 @@ module.exports = async (app: express.Application) => {
 			const user = await User.findOne({
 				host: null,
 				'account.line': {
-					user_id: sourceId
+					userId: sourceId
 				}
 			});
 
@@ -184,7 +184,7 @@ module.exports = async (app: express.Application) => {
 				User.update(user._id, {
 					$set: {
 						'account.line': {
-							user_id: sourceId
+							userId: sourceId
 						}
 					}
 				});
@@ -194,7 +194,7 @@ module.exports = async (app: express.Application) => {
 				User.update(user._id, {
 					$set: {
 						'account.line': {
-							user_id: null
+							userId: null
 						}
 					}
 				});
diff --git a/src/api/common/add-file-to-drive.ts b/src/api/common/add-file-to-drive.ts
new file mode 100644
index 0000000000..6bf5fcbc02
--- /dev/null
+++ b/src/api/common/add-file-to-drive.ts
@@ -0,0 +1,306 @@
+import { Buffer } from 'buffer';
+import * as fs from 'fs';
+import * as tmp from 'tmp';
+import * as stream from 'stream';
+
+import * as mongodb from 'mongodb';
+import * as crypto from 'crypto';
+import * as _gm from 'gm';
+import * as debug from 'debug';
+import fileType = require('file-type');
+import prominence = require('prominence');
+
+import DriveFile, { getGridFSBucket } from '../models/drive-file';
+import DriveFolder from '../models/drive-folder';
+import { pack } from '../models/drive-file';
+import event, { publishDriveStream } from '../event';
+import config from '../../conf';
+
+const gm = _gm.subClass({
+	imageMagick: true
+});
+
+const log = debug('misskey:register-drive-file');
+
+const tmpFile = (): Promise<string> => new Promise((resolve, reject) => {
+	tmp.file((e, path) => {
+		if (e) return reject(e);
+		resolve(path);
+	});
+});
+
+const addToGridFS = (name: string, readable: stream.Readable, type: string, metadata: any): Promise<any> =>
+	getGridFSBucket()
+		.then(bucket => new Promise((resolve, reject) => {
+			const writeStream = bucket.openUploadStream(name, { contentType: type, metadata });
+			writeStream.once('finish', (doc) => { resolve(doc); });
+			writeStream.on('error', reject);
+			readable.pipe(writeStream);
+		}));
+
+const addFile = async (
+	user: any,
+	path: string,
+	name: string = null,
+	comment: string = null,
+	folderId: mongodb.ObjectID = null,
+	force: boolean = false
+) => {
+	log(`registering ${name} (user: ${user.username}, path: ${path})`);
+
+	// Calculate hash, get content type and get file size
+	const [hash, [mime, ext], size] = await Promise.all([
+		// hash
+		((): Promise<string> => new Promise((res, rej) => {
+			const readable = fs.createReadStream(path);
+			const hash = crypto.createHash('md5');
+			const chunks = [];
+			readable
+				.on('error', rej)
+				.pipe(hash)
+				.on('error', rej)
+				.on('data', (chunk) => chunks.push(chunk))
+				.on('end', () => {
+					const buffer = Buffer.concat(chunks);
+					res(buffer.toString('hex'));
+				});
+		}))(),
+		// mime
+		((): Promise<[string, string | null]> => new Promise((res, rej) => {
+			const readable = fs.createReadStream(path);
+			readable
+				.on('error', rej)
+				.once('data', (buffer: Buffer) => {
+					readable.destroy();
+					const type = fileType(buffer);
+					if (type) {
+						return res([type.mime, type.ext]);
+					} else {
+						// 種類が同定できなかったら application/octet-stream にする
+						return res(['application/octet-stream', null]);
+					}
+				});
+		}))(),
+		// size
+		((): Promise<number> => new Promise((res, rej) => {
+			fs.stat(path, (err, stats) => {
+				if (err) return rej(err);
+				res(stats.size);
+			});
+		}))()
+	]);
+
+	log(`hash: ${hash}, mime: ${mime}, ext: ${ext}, size: ${size}`);
+
+	// detect name
+	const detectedName: string = name || (ext ? `untitled.${ext}` : 'untitled');
+
+	if (!force) {
+		// Check if there is a file with the same hash
+		const much = await DriveFile.findOne({
+			md5: hash,
+			'metadata.userId': user._id
+		});
+
+		if (much !== null) {
+			log('file with same hash is found');
+			return much;
+		} else {
+			log('file with same hash is not found');
+		}
+	}
+
+	const [wh, avgColor, folder] = await Promise.all([
+		// Width and height (when image)
+		(async () => {
+			// 画像かどうか
+			if (!/^image\/.*$/.test(mime)) {
+				return null;
+			}
+
+			const imageType = mime.split('/')[1];
+
+			// 画像でもPNGかJPEGかGIFでないならスキップ
+			if (imageType != 'png' && imageType != 'jpeg' && imageType != 'gif') {
+				return null;
+			}
+
+			log('calculate image width and height...');
+
+			// Calculate width and height
+			const g = gm(fs.createReadStream(path), name);
+			const size = await prominence(g).size();
+
+			log(`image width and height is calculated: ${size.width}, ${size.height}`);
+
+			return [size.width, size.height];
+		})(),
+		// average color (when image)
+		(async () => {
+			// 画像かどうか
+			if (!/^image\/.*$/.test(mime)) {
+				return null;
+			}
+
+			const imageType = mime.split('/')[1];
+
+			// 画像でもPNGかJPEGでないならスキップ
+			if (imageType != 'png' && imageType != 'jpeg') {
+				return null;
+			}
+
+			log('calculate average color...');
+
+			const buffer = await prominence(gm(fs.createReadStream(path), name)
+				.setFormat('ppm')
+				.resize(1, 1)) // 1pxのサイズに縮小して平均色を取得するというハック
+				.toBuffer();
+
+			const r = buffer.readUInt8(buffer.length - 3);
+			const g = buffer.readUInt8(buffer.length - 2);
+			const b = buffer.readUInt8(buffer.length - 1);
+
+			log(`average color is calculated: ${r}, ${g}, ${b}`);
+
+			return [r, g, b];
+		})(),
+		// folder
+		(async () => {
+			if (!folderId) {
+				return null;
+			}
+			const driveFolder = await DriveFolder.findOne({
+				_id: folderId,
+				userId: user._id
+			});
+			if (!driveFolder) {
+				throw 'folder-not-found';
+			}
+			return driveFolder;
+		})(),
+		// usage checker
+		(async () => {
+			// Calculate drive usage
+			const usage = await DriveFile
+				.aggregate([{
+					$match: { 'metadata.userId': user._id }
+				}, {
+					$project: {
+						length: true
+					}
+				}, {
+					$group: {
+						_id: null,
+						usage: { $sum: '$length' }
+					}
+				}])
+				.then((aggregates: any[]) => {
+					if (aggregates.length > 0) {
+						return aggregates[0].usage;
+					}
+					return 0;
+				});
+
+			log(`drive usage is ${usage}`);
+
+			// If usage limit exceeded
+			if (usage + size > user.driveCapacity) {
+				throw 'no-free-space';
+			}
+		})()
+	]);
+
+	const readable = fs.createReadStream(path);
+
+	const properties = {};
+
+	if (wh) {
+		properties['width'] = wh[0];
+		properties['height'] = wh[1];
+	}
+
+	if (avgColor) {
+		properties['avgColor'] = avgColor;
+	}
+
+	return addToGridFS(detectedName, readable, mime, {
+		userId: user._id,
+		folderId: folder !== null ? folder._id : null,
+		comment: comment,
+		properties: properties
+	});
+};
+
+/**
+ * Add file to drive
+ *
+ * @param user User who wish to add file
+ * @param file File path or readableStream
+ * @param comment Comment
+ * @param type File type
+ * @param folderId Folder ID
+ * @param force If set to true, forcibly upload the file even if there is a file with the same hash.
+ * @return Object that represents added file
+ */
+export default (user: any, file: string | stream.Readable, ...args) => new Promise<any>((resolve, reject) => {
+	// Get file path
+	new Promise((res: (v: [string, boolean]) => void, rej) => {
+		if (typeof file === 'string') {
+			res([file, false]);
+			return;
+		}
+		if (typeof file === 'object' && typeof file.read === 'function') {
+			tmpFile()
+				.then(path => {
+					const readable: stream.Readable = file;
+					const writable = fs.createWriteStream(path);
+					readable
+						.on('error', rej)
+						.on('end', () => {
+							res([path, true]);
+						})
+						.pipe(writable)
+						.on('error', rej);
+				})
+				.catch(rej);
+		}
+		rej(new Error('un-compatible file.'));
+	})
+	.then(([path, shouldCleanup]): Promise<any> => new Promise((res, rej) => {
+		addFile(user, path, ...args)
+			.then(file => {
+				res(file);
+				if (shouldCleanup) {
+					fs.unlink(path, (e) => {
+						if (e) log(e.stack);
+					});
+				}
+			})
+			.catch(rej);
+	}))
+	.then(file => {
+		log(`drive file has been created ${file._id}`);
+		resolve(file);
+
+		pack(file).then(serializedFile => {
+			// Publish drive_file_created event
+			event(user._id, 'drive_file_created', serializedFile);
+			publishDriveStream(user._id, 'file_created', serializedFile);
+
+			// Register to search database
+			if (config.elasticsearch.enable) {
+				const es = require('../../db/elasticsearch');
+				es.index({
+					index: 'misskey',
+					type: 'drive_file',
+					id: file._id.toString(),
+					body: {
+						name: file.name,
+						userId: user._id.toString()
+					}
+				});
+			}
+		});
+	})
+	.catch(reject);
+});
diff --git a/src/api/common/drive/add-file.ts b/src/api/common/drive/add-file.ts
index c4f2f212ac..b10f9e381b 100644
--- a/src/api/common/drive/add-file.ts
+++ b/src/api/common/drive/add-file.ts
@@ -100,7 +100,7 @@ const addFile = async (
 		// Check if there is a file with the same hash
 		const much = await DriveFile.findOne({
 			md5: hash,
-			'metadata.user_id': user._id
+			'metadata.userId': user._id
 		});
 
 		if (much !== null) {
@@ -172,7 +172,7 @@ const addFile = async (
 			}
 			const driveFolder = await DriveFolder.findOne({
 				_id: folderId,
-				user_id: user._id
+				userId: user._id
 			});
 			if (!driveFolder) {
 				throw 'folder-not-found';
@@ -184,7 +184,7 @@ const addFile = async (
 			// Calculate drive usage
 			const usage = await DriveFile
 				.aggregate([{
-					$match: { 'metadata.user_id': user._id }
+					$match: { 'metadata.userId': user._id }
 				}, {
 					$project: {
 						length: true
@@ -205,7 +205,7 @@ const addFile = async (
 			log(`drive usage is ${usage}`);
 
 			// If usage limit exceeded
-			if (usage + size > user.drive_capacity) {
+			if (usage + size > user.driveCapacity) {
 				throw 'no-free-space';
 			}
 		})()
@@ -221,12 +221,12 @@ const addFile = async (
 	}
 
 	if (averageColor) {
-		properties['average_color'] = averageColor;
+		properties['avgColor'] = averageColor;
 	}
 
 	return addToGridFS(detectedName, readable, mime, {
-		user_id: user._id,
-		folder_id: folder !== null ? folder._id : null,
+		userId: user._id,
+		folderId: folder !== null ? folder._id : null,
 		comment: comment,
 		properties: properties
 	});
@@ -297,7 +297,7 @@ export default (user: any, file: string | stream.Readable, ...args) => new Promi
 					id: file._id.toString(),
 					body: {
 						name: file.name,
-						user_id: user._id.toString()
+						userId: user._id.toString()
 					}
 				});
 			}
diff --git a/src/api/common/get-friends.ts b/src/api/common/get-friends.ts
index db6313816d..7f548b3bbf 100644
--- a/src/api/common/get-friends.ts
+++ b/src/api/common/get-friends.ts
@@ -6,17 +6,17 @@ export default async (me: mongodb.ObjectID, includeMe: boolean = true) => {
 	// SELECT followee
 	const myfollowing = await Following
 		.find({
-			follower_id: me,
+			followerId: me,
 			// 削除されたドキュメントは除く
-			deleted_at: { $exists: false }
+			deletedAt: { $exists: false }
 		}, {
 			fields: {
-				followee_id: true
+				followeeId: true
 			}
 		});
 
 	// ID list of other users who the I follows
-	const myfollowingIds = myfollowing.map(follow => follow.followee_id);
+	const myfollowingIds = myfollowing.map(follow => follow.followeeId);
 
 	if (includeMe) {
 		myfollowingIds.push(me);
diff --git a/src/api/common/notify.ts b/src/api/common/notify.ts
index ae5669b84c..c4df17f880 100644
--- a/src/api/common/notify.ts
+++ b/src/api/common/notify.ts
@@ -16,11 +16,11 @@ export default (
 
 	// Create notification
 	const notification = await Notification.insert(Object.assign({
-		created_at: new Date(),
-		notifiee_id: notifiee,
-		notifier_id: notifier,
+		createdAt: new Date(),
+		notifieeId: notifiee,
+		notifierId: notifier,
 		type: type,
-		is_read: false
+		isRead: false
 	}, content));
 
 	resolve(notification);
@@ -31,14 +31,14 @@ export default (
 
 	// 3秒経っても(今回作成した)通知が既読にならなかったら「未読の通知がありますよ」イベントを発行する
 	setTimeout(async () => {
-		const fresh = await Notification.findOne({ _id: notification._id }, { is_read: true });
-		if (!fresh.is_read) {
+		const fresh = await Notification.findOne({ _id: notification._id }, { isRead: true });
+		if (!fresh.isRead) {
 			//#region ただしミュートしているユーザーからの通知なら無視
 			const mute = await Mute.find({
-				muter_id: notifiee,
-				deleted_at: { $exists: false }
+				muterId: notifiee,
+				deletedAt: { $exists: false }
 			});
-			const mutedUserIds = mute.map(m => m.mutee_id.toString());
+			const mutedUserIds = mute.map(m => m.muteeId.toString());
 			if (mutedUserIds.indexOf(notifier.toString()) != -1) {
 				return;
 			}
diff --git a/src/api/common/push-sw.ts b/src/api/common/push-sw.ts
index 2993c760ee..f90233233f 100644
--- a/src/api/common/push-sw.ts
+++ b/src/api/common/push-sw.ts
@@ -20,7 +20,7 @@ export default async function(userId: mongo.ObjectID | string, type, body?) {
 
 	// Fetch
 	const subscriptions = await Subscription.find({
-		user_id: userId
+		userId: userId
 	});
 
 	subscriptions.forEach(subscription => {
@@ -41,7 +41,7 @@ export default async function(userId: mongo.ObjectID | string, type, body?) {
 
 			if (err.statusCode == 410) {
 				Subscription.remove({
-					user_id: userId,
+					userId: userId,
 					endpoint: subscription.endpoint,
 					auth: subscription.auth,
 					publickey: subscription.publickey
diff --git a/src/api/common/read-messaging-message.ts b/src/api/common/read-messaging-message.ts
index 8e5e5b2b68..9047edec8c 100644
--- a/src/api/common/read-messaging-message.ts
+++ b/src/api/common/read-messaging-message.ts
@@ -37,12 +37,12 @@ export default (
 	// Update documents
 	await Message.update({
 		_id: { $in: ids },
-		user_id: otherpartyId,
-		recipient_id: userId,
-		is_read: false
+		userId: otherpartyId,
+		recipientId: userId,
+		isRead: false
 	}, {
 		$set: {
-			is_read: true
+			isRead: true
 		}
 	}, {
 		multi: true
@@ -55,8 +55,8 @@ export default (
 	// Calc count of my unread messages
 	const count = await Message
 		.count({
-			recipient_id: userId,
-			is_read: false
+			recipientId: userId,
+			isRead: false
 		});
 
 	if (count == 0) {
diff --git a/src/api/common/read-notification.ts b/src/api/common/read-notification.ts
index 3009cc5d08..5bbf136323 100644
--- a/src/api/common/read-notification.ts
+++ b/src/api/common/read-notification.ts
@@ -29,10 +29,10 @@ export default (
 	// Update documents
 	await Notification.update({
 		_id: { $in: ids },
-		is_read: false
+		isRead: false
 	}, {
 		$set: {
-			is_read: true
+			isRead: true
 		}
 	}, {
 		multi: true
@@ -41,8 +41,8 @@ export default (
 	// Calc count of my unread notifications
 	const count = await Notification
 		.count({
-			notifiee_id: userId,
-			is_read: false
+			notifieeId: userId,
+			isRead: false
 		});
 
 	if (count == 0) {
diff --git a/src/api/common/watch-post.ts b/src/api/common/watch-post.ts
index 1a50f0edaa..61ea444430 100644
--- a/src/api/common/watch-post.ts
+++ b/src/api/common/watch-post.ts
@@ -3,15 +3,15 @@ import Watching from '../models/post-watching';
 
 export default async (me: mongodb.ObjectID, post: object) => {
 	// 自分の投稿はwatchできない
-	if (me.equals((post as any).user_id)) {
+	if (me.equals((post as any).userId)) {
 		return;
 	}
 
 	// if watching now
 	const exist = await Watching.findOne({
-		post_id: (post as any)._id,
-		user_id: me,
-		deleted_at: { $exists: false }
+		postId: (post as any)._id,
+		userId: me,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist !== null) {
@@ -19,8 +19,8 @@ export default async (me: mongodb.ObjectID, post: object) => {
 	}
 
 	await Watching.insert({
-		created_at: new Date(),
-		post_id: (post as any)._id,
-		user_id: me
+		createdAt: new Date(),
+		postId: (post as any)._id,
+		userId: me
 	});
 };
diff --git a/src/api/endpoints/aggregation/posts.ts b/src/api/endpoints/aggregation/posts.ts
index 9d8bccbdb2..67d2619640 100644
--- a/src/api/endpoints/aggregation/posts.ts
+++ b/src/api/endpoints/aggregation/posts.ts
@@ -18,23 +18,23 @@ module.exports = params => new Promise(async (res, rej) => {
 	const datas = await Post
 		.aggregate([
 			{ $project: {
-				repost_id: '$repost_id',
-				reply_id: '$reply_id',
-				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+				repostId: '$repostId',
+				replyId: '$replyId',
+				createdAt: { $add: ['$createdAt', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
 				date: {
-					year: { $year: '$created_at' },
-					month: { $month: '$created_at' },
-					day: { $dayOfMonth: '$created_at' }
+					year: { $year: '$createdAt' },
+					month: { $month: '$createdAt' },
+					day: { $dayOfMonth: '$createdAt' }
 				},
 				type: {
 					$cond: {
-						if: { $ne: ['$repost_id', null] },
+						if: { $ne: ['$repostId', null] },
 						then: 'repost',
 						else: {
 							$cond: {
-								if: { $ne: ['$reply_id', null] },
+								if: { $ne: ['$replyId', null] },
 								then: 'reply',
 								else: 'post'
 							}
diff --git a/src/api/endpoints/aggregation/posts/reaction.ts b/src/api/endpoints/aggregation/posts/reaction.ts
index eb99b9d088..9f9a4f37ee 100644
--- a/src/api/endpoints/aggregation/posts/reaction.ts
+++ b/src/api/endpoints/aggregation/posts/reaction.ts
@@ -12,9 +12,9 @@ import Reaction from '../../../models/post-reaction';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Lookup post
 	const post = await Post.findOne({
@@ -27,15 +27,15 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const datas = await Reaction
 		.aggregate([
-			{ $match: { post_id: post._id } },
+			{ $match: { postId: post._id } },
 			{ $project: {
-				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+				createdAt: { $add: ['$createdAt', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
 				date: {
-					year: { $year: '$created_at' },
-					month: { $month: '$created_at' },
-					day: { $dayOfMonth: '$created_at' }
+					year: { $year: '$createdAt' },
+					month: { $month: '$createdAt' },
+					day: { $dayOfMonth: '$createdAt' }
 				}
 			}},
 			{ $group: {
diff --git a/src/api/endpoints/aggregation/posts/reactions.ts b/src/api/endpoints/aggregation/posts/reactions.ts
index 790b523be9..2dc989281c 100644
--- a/src/api/endpoints/aggregation/posts/reactions.ts
+++ b/src/api/endpoints/aggregation/posts/reactions.ts
@@ -12,9 +12,9 @@ import Reaction from '../../../models/post-reaction';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Lookup post
 	const post = await Post.findOne({
@@ -29,10 +29,10 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const reactions = await Reaction
 		.find({
-			post_id: post._id,
+			postId: post._id,
 			$or: [
-				{ deleted_at: { $exists: false } },
-				{ deleted_at: { $gt: startTime } }
+				{ deletedAt: { $exists: false } },
+				{ deletedAt: { $gt: startTime } }
 			]
 		}, {
 			sort: {
@@ -40,7 +40,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 			},
 			fields: {
 				_id: false,
-				post_id: false
+				postId: false
 			}
 		});
 
@@ -55,7 +55,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 		// day = day.getTime();
 
 		const count = reactions.filter(r =>
-			r.created_at < day && (r.deleted_at == null || r.deleted_at > day)
+			r.createdAt < day && (r.deletedAt == null || r.deletedAt > day)
 		).length;
 
 		graph.push({
diff --git a/src/api/endpoints/aggregation/posts/reply.ts b/src/api/endpoints/aggregation/posts/reply.ts
index b114c34e1e..3b050582a9 100644
--- a/src/api/endpoints/aggregation/posts/reply.ts
+++ b/src/api/endpoints/aggregation/posts/reply.ts
@@ -11,9 +11,9 @@ import Post from '../../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Lookup post
 	const post = await Post.findOne({
@@ -28,13 +28,13 @@ module.exports = (params) => new Promise(async (res, rej) => {
 		.aggregate([
 			{ $match: { reply: post._id } },
 			{ $project: {
-				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+				createdAt: { $add: ['$createdAt', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
 				date: {
-					year: { $year: '$created_at' },
-					month: { $month: '$created_at' },
-					day: { $dayOfMonth: '$created_at' }
+					year: { $year: '$createdAt' },
+					month: { $month: '$createdAt' },
+					day: { $dayOfMonth: '$createdAt' }
 				}
 			}},
 			{ $group: {
diff --git a/src/api/endpoints/aggregation/posts/repost.ts b/src/api/endpoints/aggregation/posts/repost.ts
index 217159caa7..d9f3e36a07 100644
--- a/src/api/endpoints/aggregation/posts/repost.ts
+++ b/src/api/endpoints/aggregation/posts/repost.ts
@@ -11,9 +11,9 @@ import Post from '../../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Lookup post
 	const post = await Post.findOne({
@@ -26,15 +26,15 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const datas = await Post
 		.aggregate([
-			{ $match: { repost_id: post._id } },
+			{ $match: { repostId: post._id } },
 			{ $project: {
-				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+				createdAt: { $add: ['$createdAt', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
 				date: {
-					year: { $year: '$created_at' },
-					month: { $month: '$created_at' },
-					day: { $dayOfMonth: '$created_at' }
+					year: { $year: '$createdAt' },
+					month: { $month: '$createdAt' },
+					day: { $dayOfMonth: '$createdAt' }
 				}
 			}},
 			{ $group: {
diff --git a/src/api/endpoints/aggregation/users.ts b/src/api/endpoints/aggregation/users.ts
index e38ce92ff9..a4e91a2282 100644
--- a/src/api/endpoints/aggregation/users.ts
+++ b/src/api/endpoints/aggregation/users.ts
@@ -22,8 +22,8 @@ module.exports = params => new Promise(async (res, rej) => {
 			},
 			fields: {
 				_id: false,
-				created_at: true,
-				deleted_at: true
+				createdAt: true,
+				deletedAt: true
 			}
 		});
 
@@ -44,11 +44,11 @@ module.exports = params => new Promise(async (res, rej) => {
 		// day = day.getTime();
 
 		const total = users.filter(u =>
-			u.created_at < dayEnd && (u.deleted_at == null || u.deleted_at > dayEnd)
+			u.createdAt < dayEnd && (u.deletedAt == null || u.deletedAt > dayEnd)
 		).length;
 
 		const created = users.filter(u =>
-			u.created_at < dayEnd && u.created_at > dayStart
+			u.createdAt < dayEnd && u.createdAt > dayStart
 		).length;
 
 		graph.push({
diff --git a/src/api/endpoints/aggregation/users/activity.ts b/src/api/endpoints/aggregation/users/activity.ts
index 102a71d7cb..d477616578 100644
--- a/src/api/endpoints/aggregation/users/activity.ts
+++ b/src/api/endpoints/aggregation/users/activity.ts
@@ -18,9 +18,9 @@ module.exports = (params) => new Promise(async (res, rej) => {
 	const [limit = 365, limitErr] = $(params.limit).optional.number().range(1, 365).$;
 	if (limitErr) return rej('invalid limit param');
 
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Lookup user
 	const user = await User.findOne({
@@ -37,25 +37,25 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const datas = await Post
 		.aggregate([
-			{ $match: { user_id: user._id } },
+			{ $match: { userId: user._id } },
 			{ $project: {
-				repost_id: '$repost_id',
-				reply_id: '$reply_id',
-				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+				repostId: '$repostId',
+				replyId: '$replyId',
+				createdAt: { $add: ['$createdAt', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
 				date: {
-					year: { $year: '$created_at' },
-					month: { $month: '$created_at' },
-					day: { $dayOfMonth: '$created_at' }
+					year: { $year: '$createdAt' },
+					month: { $month: '$createdAt' },
+					day: { $dayOfMonth: '$createdAt' }
 				},
 				type: {
 					$cond: {
-						if: { $ne: ['$repost_id', null] },
+						if: { $ne: ['$repostId', null] },
 						then: 'repost',
 						else: {
 							$cond: {
-								if: { $ne: ['$reply_id', null] },
+								if: { $ne: ['$replyId', null] },
 								then: 'reply',
 								else: 'post'
 							}
diff --git a/src/api/endpoints/aggregation/users/followers.ts b/src/api/endpoints/aggregation/users/followers.ts
index 3022b2b002..73a30281b3 100644
--- a/src/api/endpoints/aggregation/users/followers.ts
+++ b/src/api/endpoints/aggregation/users/followers.ts
@@ -12,9 +12,9 @@ import Following from '../../../models/following';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Lookup user
 	const user = await User.findOne({
@@ -33,17 +33,17 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const following = await Following
 		.find({
-			followee_id: user._id,
+			followeeId: user._id,
 			$or: [
-				{ deleted_at: { $exists: false } },
-				{ deleted_at: { $gt: startTime } }
+				{ deletedAt: { $exists: false } },
+				{ deletedAt: { $gt: startTime } }
 			]
 		}, {
 			_id: false,
-			follower_id: false,
-			followee_id: false
+			followerId: false,
+			followeeId: false
 		}, {
-			sort: { created_at: -1 }
+			sort: { createdAt: -1 }
 		});
 
 	const graph = [];
@@ -57,7 +57,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 		// day = day.getTime();
 
 		const count = following.filter(f =>
-			f.created_at < day && (f.deleted_at == null || f.deleted_at > day)
+			f.createdAt < day && (f.deletedAt == null || f.deletedAt > day)
 		).length;
 
 		graph.push({
diff --git a/src/api/endpoints/aggregation/users/following.ts b/src/api/endpoints/aggregation/users/following.ts
index 92da7e6921..16fc568d59 100644
--- a/src/api/endpoints/aggregation/users/following.ts
+++ b/src/api/endpoints/aggregation/users/following.ts
@@ -12,9 +12,9 @@ import Following from '../../../models/following';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Lookup user
 	const user = await User.findOne({
@@ -33,17 +33,17 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const following = await Following
 		.find({
-			follower_id: user._id,
+			followerId: user._id,
 			$or: [
-				{ deleted_at: { $exists: false } },
-				{ deleted_at: { $gt: startTime } }
+				{ deletedAt: { $exists: false } },
+				{ deletedAt: { $gt: startTime } }
 			]
 		}, {
 			_id: false,
-			follower_id: false,
-			followee_id: false
+			followerId: false,
+			followeeId: false
 		}, {
-			sort: { created_at: -1 }
+			sort: { createdAt: -1 }
 		});
 
 	const graph = [];
@@ -56,7 +56,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 		day = new Date(day.setHours(23));
 
 		const count = following.filter(f =>
-			f.created_at < day && (f.deleted_at == null || f.deleted_at > day)
+			f.createdAt < day && (f.deletedAt == null || f.deletedAt > day)
 		).length;
 
 		graph.push({
diff --git a/src/api/endpoints/aggregation/users/post.ts b/src/api/endpoints/aggregation/users/post.ts
index c6a75eee39..c988748593 100644
--- a/src/api/endpoints/aggregation/users/post.ts
+++ b/src/api/endpoints/aggregation/users/post.ts
@@ -12,9 +12,9 @@ import Post from '../../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Lookup user
 	const user = await User.findOne({
@@ -31,25 +31,25 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const datas = await Post
 		.aggregate([
-			{ $match: { user_id: user._id } },
+			{ $match: { userId: user._id } },
 			{ $project: {
-				repost_id: '$repost_id',
-				reply_id: '$reply_id',
-				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+				repostId: '$repostId',
+				replyId: '$replyId',
+				createdAt: { $add: ['$createdAt', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
 				date: {
-					year: { $year: '$created_at' },
-					month: { $month: '$created_at' },
-					day: { $dayOfMonth: '$created_at' }
+					year: { $year: '$createdAt' },
+					month: { $month: '$createdAt' },
+					day: { $dayOfMonth: '$createdAt' }
 				},
 				type: {
 					$cond: {
-						if: { $ne: ['$repost_id', null] },
+						if: { $ne: ['$repostId', null] },
 						then: 'repost',
 						else: {
 							$cond: {
-								if: { $ne: ['$reply_id', null] },
+								if: { $ne: ['$replyId', null] },
 								then: 'reply',
 								else: 'post'
 							}
diff --git a/src/api/endpoints/aggregation/users/reaction.ts b/src/api/endpoints/aggregation/users/reaction.ts
index 0a082ed1b7..60b33e9d1c 100644
--- a/src/api/endpoints/aggregation/users/reaction.ts
+++ b/src/api/endpoints/aggregation/users/reaction.ts
@@ -12,9 +12,9 @@ import Reaction from '../../../models/post-reaction';
  * @return {Promise<any>}
  */
 module.exports = (params) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Lookup user
 	const user = await User.findOne({
@@ -31,15 +31,15 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	const datas = await Reaction
 		.aggregate([
-			{ $match: { user_id: user._id } },
+			{ $match: { userId: user._id } },
 			{ $project: {
-				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+				createdAt: { $add: ['$createdAt', 9 * 60 * 60 * 1000] } // Convert into JST
 			}},
 			{ $project: {
 				date: {
-					year: { $year: '$created_at' },
-					month: { $month: '$created_at' },
-					day: { $dayOfMonth: '$created_at' }
+					year: { $year: '$createdAt' },
+					month: { $month: '$createdAt' },
+					day: { $dayOfMonth: '$createdAt' }
 				}
 			}},
 			{ $group: {
diff --git a/src/api/endpoints/app/create.ts b/src/api/endpoints/app/create.ts
index 0f688792a7..cde4846e0f 100644
--- a/src/api/endpoints/app/create.ts
+++ b/src/api/endpoints/app/create.ts
@@ -13,7 +13,7 @@ import App, { isValidNameId, pack } from '../../models/app';
  *     parameters:
  *       - $ref: "#/parameters/AccessToken"
  *       -
- *         name: name_id
+ *         name: nameId
  *         description: Application unique name
  *         in: formData
  *         required: true
@@ -66,9 +66,9 @@ import App, { isValidNameId, pack } from '../../models/app';
  * @return {Promise<any>}
  */
 module.exports = async (params, user) => new Promise(async (res, rej) => {
-	// Get 'name_id' parameter
-	const [nameId, nameIdErr] = $(params.name_id).string().pipe(isValidNameId).$;
-	if (nameIdErr) return rej('invalid name_id param');
+	// Get 'nameId' parameter
+	const [nameId, nameIdErr] = $(params.nameId).string().pipe(isValidNameId).$;
+	if (nameIdErr) return rej('invalid nameId param');
 
 	// Get 'name' parameter
 	const [name, nameErr] = $(params.name).string().$;
@@ -92,11 +92,11 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	// Create account
 	const app = await App.insert({
-		created_at: new Date(),
-		user_id: user._id,
+		createdAt: new Date(),
+		userId: user._id,
 		name: name,
-		name_id: nameId,
-		name_id_lower: nameId.toLowerCase(),
+		nameId: nameId,
+		nameIdLower: nameId.toLowerCase(),
 		description: description,
 		permission: permission,
 		callback_url: callbackUrl,
diff --git a/src/api/endpoints/app/name_id/available.ts b/src/api/endpoints/app/name_id/available.ts
index 3d2c710322..6d02b26d2b 100644
--- a/src/api/endpoints/app/name_id/available.ts
+++ b/src/api/endpoints/app/name_id/available.ts
@@ -7,12 +7,12 @@ import { isValidNameId } from '../../../models/app';
 
 /**
  * @swagger
- * /app/name_id/available:
+ * /app/nameId/available:
  *   post:
- *     summary: Check available name_id on creation an application
+ *     summary: Check available nameId on creation an application
  *     parameters:
  *       -
- *         name: name_id
+ *         name: nameId
  *         description: Application unique name
  *         in: formData
  *         required: true
@@ -25,7 +25,7 @@ import { isValidNameId } from '../../../models/app';
  *           type: object
  *           properties:
  *             available:
- *               description: Whether name_id is available
+ *               description: Whether nameId is available
  *               type: boolean
  *
  *       default:
@@ -35,20 +35,20 @@ import { isValidNameId } from '../../../models/app';
  */
 
 /**
- * Check available name_id of app
+ * Check available nameId of app
  *
  * @param {any} params
  * @return {Promise<any>}
  */
 module.exports = async (params) => new Promise(async (res, rej) => {
-	// Get 'name_id' parameter
-	const [nameId, nameIdErr] = $(params.name_id).string().pipe(isValidNameId).$;
-	if (nameIdErr) return rej('invalid name_id param');
+	// Get 'nameId' parameter
+	const [nameId, nameIdErr] = $(params.nameId).string().pipe(isValidNameId).$;
+	if (nameIdErr) return rej('invalid nameId param');
 
 	// Get exist
 	const exist = await App
 		.count({
-			name_id_lower: nameId.toLowerCase()
+			nameIdLower: nameId.toLowerCase()
 		}, {
 			limit: 1
 		});
diff --git a/src/api/endpoints/app/show.ts b/src/api/endpoints/app/show.ts
index 8bc3dda42c..34bb958eee 100644
--- a/src/api/endpoints/app/show.ts
+++ b/src/api/endpoints/app/show.ts
@@ -9,15 +9,15 @@ import App, { pack } from '../../models/app';
  * /app/show:
  *   post:
  *     summary: Show an application's information
- *     description: Require app_id or name_id
+ *     description: Require appId or nameId
  *     parameters:
  *       -
- *         name: app_id
+ *         name: appId
  *         description: Application ID
  *         in: formData
  *         type: string
  *       -
- *         name: name_id
+ *         name: nameId
  *         description: Application unique name
  *         in: formData
  *         type: string
@@ -44,22 +44,22 @@ import App, { pack } from '../../models/app';
  * @return {Promise<any>}
  */
 module.exports = (params, user, _, isSecure) => new Promise(async (res, rej) => {
-	// Get 'app_id' parameter
-	const [appId, appIdErr] = $(params.app_id).optional.id().$;
-	if (appIdErr) return rej('invalid app_id param');
+	// Get 'appId' parameter
+	const [appId, appIdErr] = $(params.appId).optional.id().$;
+	if (appIdErr) return rej('invalid appId param');
 
-	// Get 'name_id' parameter
-	const [nameId, nameIdErr] = $(params.name_id).optional.string().$;
-	if (nameIdErr) return rej('invalid name_id param');
+	// Get 'nameId' parameter
+	const [nameId, nameIdErr] = $(params.nameId).optional.string().$;
+	if (nameIdErr) return rej('invalid nameId param');
 
 	if (appId === undefined && nameId === undefined) {
-		return rej('app_id or name_id is required');
+		return rej('appId or nameId is required');
 	}
 
 	// Lookup app
 	const app = appId !== undefined
 		? await App.findOne({ _id: appId })
-		: await App.findOne({ name_id_lower: nameId.toLowerCase() });
+		: await App.findOne({ nameIdLower: nameId.toLowerCase() });
 
 	if (app === null) {
 		return rej('app not found');
@@ -67,6 +67,6 @@ module.exports = (params, user, _, isSecure) => new Promise(async (res, rej) =>
 
 	// Send response
 	res(await pack(app, user, {
-		includeSecret: isSecure && app.user_id.equals(user._id)
+		includeSecret: isSecure && app.userId.equals(user._id)
 	}));
 });
diff --git a/src/api/endpoints/auth/accept.ts b/src/api/endpoints/auth/accept.ts
index 4ee20a6d25..5a1925144d 100644
--- a/src/api/endpoints/auth/accept.ts
+++ b/src/api/endpoints/auth/accept.ts
@@ -56,14 +56,14 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Fetch exist access token
 	const exist = await AccessToken.findOne({
-		app_id: session.app_id,
-		user_id: user._id,
+		appId: session.appId,
+		userId: user._id,
 	});
 
 	if (exist === null) {
 		// Lookup app
 		const app = await App.findOne({
-			_id: session.app_id
+			_id: session.appId
 		});
 
 		// Generate Hash
@@ -73,9 +73,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 		// Insert access token doc
 		await AccessToken.insert({
-			created_at: new Date(),
-			app_id: session.app_id,
-			user_id: user._id,
+			createdAt: new Date(),
+			appId: session.appId,
+			userId: user._id,
 			token: accessToken,
 			hash: hash
 		});
@@ -84,7 +84,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Update session
 	await AuthSess.update(session._id, {
 		$set: {
-			user_id: user._id
+			userId: user._id
 		}
 	});
 
diff --git a/src/api/endpoints/auth/session/generate.ts b/src/api/endpoints/auth/session/generate.ts
index 510382247e..81db188ee5 100644
--- a/src/api/endpoints/auth/session/generate.ts
+++ b/src/api/endpoints/auth/session/generate.ts
@@ -63,8 +63,8 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	// Create session token document
 	const doc = await AuthSess.insert({
-		created_at: new Date(),
-		app_id: app._id,
+		createdAt: new Date(),
+		appId: app._id,
 		token: token
 	});
 
diff --git a/src/api/endpoints/auth/session/show.ts b/src/api/endpoints/auth/session/show.ts
index 73ac3185f6..869b714e71 100644
--- a/src/api/endpoints/auth/session/show.ts
+++ b/src/api/endpoints/auth/session/show.ts
@@ -23,17 +23,17 @@ import AuthSess, { pack } from '../../../models/auth-session';
  *         schema:
  *           type: object
  *           properties:
- *             created_at:
+ *             createdAt:
  *               type: string
  *               format: date-time
  *               description: Date and time of the session creation
- *             app_id:
+ *             appId:
  *               type: string
  *               description: Application ID
  *             token:
  *               type: string
  *               description: Session Token
- *             user_id:
+ *             userId:
  *               type: string
  *               description: ID of user who create the session
  *             app:
diff --git a/src/api/endpoints/auth/session/userkey.ts b/src/api/endpoints/auth/session/userkey.ts
index fc989bf8c2..74f025c8a5 100644
--- a/src/api/endpoints/auth/session/userkey.ts
+++ b/src/api/endpoints/auth/session/userkey.ts
@@ -71,21 +71,21 @@ module.exports = (params) => new Promise(async (res, rej) => {
 	const session = await AuthSess
 		.findOne({
 			token: token,
-			app_id: app._id
+			appId: app._id
 		});
 
 	if (session === null) {
 		return rej('session not found');
 	}
 
-	if (session.user_id == null) {
+	if (session.userId == null) {
 		return rej('this session is not allowed yet');
 	}
 
 	// Lookup access token
 	const accessToken = await AccessToken.findOne({
-		app_id: app._id,
-		user_id: session.user_id
+		appId: app._id,
+		userId: session.userId
 	});
 
 	// Delete session
@@ -101,8 +101,8 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	// Response
 	res({
-		access_token: accessToken.token,
-		user: await pack(session.user_id, null, {
+		accessToken: accessToken.token,
+		user: await pack(session.userId, null, {
 			detail: true
 		})
 	});
diff --git a/src/api/endpoints/channels/create.ts b/src/api/endpoints/channels/create.ts
index 695b4515b3..1dc453c4a5 100644
--- a/src/api/endpoints/channels/create.ts
+++ b/src/api/endpoints/channels/create.ts
@@ -20,11 +20,11 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	// Create a channel
 	const channel = await Channel.insert({
-		created_at: new Date(),
-		user_id: user._id,
+		createdAt: new Date(),
+		userId: user._id,
 		title: title,
 		index: 0,
-		watching_count: 1
+		watchingCount: 1
 	});
 
 	// Response
@@ -32,8 +32,8 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	// Create Watching
 	await Watching.insert({
-		created_at: new Date(),
-		user_id: user._id,
-		channel_id: channel._id
+		createdAt: new Date(),
+		userId: user._id,
+		channelId: channel._id
 	});
 });
diff --git a/src/api/endpoints/channels/posts.ts b/src/api/endpoints/channels/posts.ts
index d722589c20..7536664051 100644
--- a/src/api/endpoints/channels/posts.ts
+++ b/src/api/endpoints/channels/posts.ts
@@ -30,9 +30,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		return rej('cannot set since_id and until_id');
 	}
 
-	// Get 'channel_id' parameter
-	const [channelId, channelIdErr] = $(params.channel_id).id().$;
-	if (channelIdErr) return rej('invalid channel_id param');
+	// Get 'channelId' parameter
+	const [channelId, channelIdErr] = $(params.channelId).id().$;
+	if (channelIdErr) return rej('invalid channelId param');
 
 	// Fetch channel
 	const channel: IChannel = await Channel.findOne({
@@ -49,7 +49,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	};
 
 	const query = {
-		channel_id: channel._id
+		channelId: channel._id
 	} as any;
 
 	if (sinceId) {
diff --git a/src/api/endpoints/channels/show.ts b/src/api/endpoints/channels/show.ts
index 332da64675..5874ed18a6 100644
--- a/src/api/endpoints/channels/show.ts
+++ b/src/api/endpoints/channels/show.ts
@@ -12,9 +12,9 @@ import Channel, { IChannel, pack } from '../../models/channel';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'channel_id' parameter
-	const [channelId, channelIdErr] = $(params.channel_id).id().$;
-	if (channelIdErr) return rej('invalid channel_id param');
+	// Get 'channelId' parameter
+	const [channelId, channelIdErr] = $(params.channelId).id().$;
+	if (channelIdErr) return rej('invalid channelId param');
 
 	// Fetch channel
 	const channel: IChannel = await Channel.findOne({
diff --git a/src/api/endpoints/channels/unwatch.ts b/src/api/endpoints/channels/unwatch.ts
index 19d3be118a..709313bc6e 100644
--- a/src/api/endpoints/channels/unwatch.ts
+++ b/src/api/endpoints/channels/unwatch.ts
@@ -13,9 +13,9 @@ import Watching from '../../models/channel-watching';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'channel_id' parameter
-	const [channelId, channelIdErr] = $(params.channel_id).id().$;
-	if (channelIdErr) return rej('invalid channel_id param');
+	// Get 'channelId' parameter
+	const [channelId, channelIdErr] = $(params.channelId).id().$;
+	if (channelIdErr) return rej('invalid channelId param');
 
 	//#region Fetch channel
 	const channel = await Channel.findOne({
@@ -29,9 +29,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	//#region Check whether not watching
 	const exist = await Watching.findOne({
-		user_id: user._id,
-		channel_id: channel._id,
-		deleted_at: { $exists: false }
+		userId: user._id,
+		channelId: channel._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist === null) {
@@ -44,7 +44,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		_id: exist._id
 	}, {
 		$set: {
-			deleted_at: new Date()
+			deletedAt: new Date()
 		}
 	});
 
@@ -54,7 +54,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Decrement watching count
 	Channel.update(channel._id, {
 		$inc: {
-			watching_count: -1
+			watchingCount: -1
 		}
 	});
 });
diff --git a/src/api/endpoints/channels/watch.ts b/src/api/endpoints/channels/watch.ts
index 030e0dd411..df9e70d5c2 100644
--- a/src/api/endpoints/channels/watch.ts
+++ b/src/api/endpoints/channels/watch.ts
@@ -13,9 +13,9 @@ import Watching from '../../models/channel-watching';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'channel_id' parameter
-	const [channelId, channelIdErr] = $(params.channel_id).id().$;
-	if (channelIdErr) return rej('invalid channel_id param');
+	// Get 'channelId' parameter
+	const [channelId, channelIdErr] = $(params.channelId).id().$;
+	if (channelIdErr) return rej('invalid channelId param');
 
 	//#region Fetch channel
 	const channel = await Channel.findOne({
@@ -29,9 +29,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	//#region Check whether already watching
 	const exist = await Watching.findOne({
-		user_id: user._id,
-		channel_id: channel._id,
-		deleted_at: { $exists: false }
+		userId: user._id,
+		channelId: channel._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist !== null) {
@@ -41,9 +41,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Create Watching
 	await Watching.insert({
-		created_at: new Date(),
-		user_id: user._id,
-		channel_id: channel._id
+		createdAt: new Date(),
+		userId: user._id,
+		channelId: channel._id
 	});
 
 	// Send response
@@ -52,7 +52,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Increment watching count
 	Channel.update(channel._id, {
 		$inc: {
-			watching_count: 1
+			watchingCount: 1
 		}
 	});
 });
diff --git a/src/api/endpoints/drive.ts b/src/api/endpoints/drive.ts
index d92473633a..eb21853916 100644
--- a/src/api/endpoints/drive.ts
+++ b/src/api/endpoints/drive.ts
@@ -14,7 +14,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Calculate drive usage
 	const usage = ((await DriveFile
 		.aggregate([
-			{ $match: { 'metadata.user_id': user._id } },
+			{ $match: { 'metadata.userId': user._id } },
 			{
 				$project: {
 					length: true
@@ -31,7 +31,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		}).usage;
 
 	res({
-		capacity: user.drive_capacity,
+		capacity: user.driveCapacity,
 		usage: usage
 	});
 });
diff --git a/src/api/endpoints/drive/files.ts b/src/api/endpoints/drive/files.ts
index 89915331ea..1ce855932b 100644
--- a/src/api/endpoints/drive/files.ts
+++ b/src/api/endpoints/drive/files.ts
@@ -30,9 +30,9 @@ module.exports = async (params, user, app) => {
 		throw 'cannot set since_id and until_id';
 	}
 
-	// Get 'folder_id' parameter
-	const [folderId = null, folderIdErr] = $(params.folder_id).optional.nullable.id().$;
-	if (folderIdErr) throw 'invalid folder_id param';
+	// Get 'folderId' parameter
+	const [folderId = null, folderIdErr] = $(params.folderId).optional.nullable.id().$;
+	if (folderIdErr) throw 'invalid folderId param';
 
 	// Get 'type' parameter
 	const [type, typeErr] = $(params.type).optional.string().match(/^[a-zA-Z\/\-\*]+$/).$;
@@ -43,8 +43,8 @@ module.exports = async (params, user, app) => {
 		_id: -1
 	};
 	const query = {
-		'metadata.user_id': user._id,
-		'metadata.folder_id': folderId
+		'metadata.userId': user._id,
+		'metadata.folderId': folderId
 	} as any;
 	if (sinceId) {
 		sort._id = 1;
diff --git a/src/api/endpoints/drive/files/create.ts b/src/api/endpoints/drive/files/create.ts
index db801b61fe..2cd89a8fac 100644
--- a/src/api/endpoints/drive/files/create.ts
+++ b/src/api/endpoints/drive/files/create.ts
@@ -33,9 +33,9 @@ module.exports = async (file, params, user): Promise<any> => {
 		name = null;
 	}
 
-	// Get 'folder_id' parameter
-	const [folderId = null, folderIdErr] = $(params.folder_id).optional.nullable.id().$;
-	if (folderIdErr) throw 'invalid folder_id param';
+	// Get 'folderId' parameter
+	const [folderId = null, folderIdErr] = $(params.folderId).optional.nullable.id().$;
+	if (folderIdErr) throw 'invalid folderId param';
 
 	try {
 		// Create file
diff --git a/src/api/endpoints/drive/files/find.ts b/src/api/endpoints/drive/files/find.ts
index e026afe936..47ce891305 100644
--- a/src/api/endpoints/drive/files/find.ts
+++ b/src/api/endpoints/drive/files/find.ts
@@ -16,16 +16,16 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	const [name, nameErr] = $(params.name).string().$;
 	if (nameErr) return rej('invalid name param');
 
-	// Get 'folder_id' parameter
-	const [folderId = null, folderIdErr] = $(params.folder_id).optional.nullable.id().$;
-	if (folderIdErr) return rej('invalid folder_id param');
+	// Get 'folderId' parameter
+	const [folderId = null, folderIdErr] = $(params.folderId).optional.nullable.id().$;
+	if (folderIdErr) return rej('invalid folderId param');
 
 	// Issue query
 	const files = await DriveFile
 		.find({
 			filename: name,
-			'metadata.user_id': user._id,
-			'metadata.folder_id': folderId
+			'metadata.userId': user._id,
+			'metadata.folderId': folderId
 		});
 
 	// Serialize
diff --git a/src/api/endpoints/drive/files/show.ts b/src/api/endpoints/drive/files/show.ts
index 21664f7ba4..63920db7fc 100644
--- a/src/api/endpoints/drive/files/show.ts
+++ b/src/api/endpoints/drive/files/show.ts
@@ -12,15 +12,15 @@ import DriveFile, { pack } from '../../../models/drive-file';
  * @return {Promise<any>}
  */
 module.exports = async (params, user) => {
-	// Get 'file_id' parameter
-	const [fileId, fileIdErr] = $(params.file_id).id().$;
-	if (fileIdErr) throw 'invalid file_id param';
+	// Get 'fileId' parameter
+	const [fileId, fileIdErr] = $(params.fileId).id().$;
+	if (fileIdErr) throw 'invalid fileId param';
 
 	// Fetch file
 	const file = await DriveFile
 		.findOne({
 			_id: fileId,
-			'metadata.user_id': user._id
+			'metadata.userId': user._id
 		});
 
 	if (file === null) {
diff --git a/src/api/endpoints/drive/files/update.ts b/src/api/endpoints/drive/files/update.ts
index 83da462113..bfad45b0a2 100644
--- a/src/api/endpoints/drive/files/update.ts
+++ b/src/api/endpoints/drive/files/update.ts
@@ -14,15 +14,15 @@ import { publishDriveStream } from '../../../event';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'file_id' parameter
-	const [fileId, fileIdErr] = $(params.file_id).id().$;
-	if (fileIdErr) return rej('invalid file_id param');
+	// Get 'fileId' parameter
+	const [fileId, fileIdErr] = $(params.fileId).id().$;
+	if (fileIdErr) return rej('invalid fileId param');
 
 	// Fetch file
 	const file = await DriveFile
 		.findOne({
 			_id: fileId,
-			'metadata.user_id': user._id
+			'metadata.userId': user._id
 		});
 
 	if (file === null) {
@@ -34,33 +34,33 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	if (nameErr) return rej('invalid name param');
 	if (name) file.filename = name;
 
-	// Get 'folder_id' parameter
-	const [folderId, folderIdErr] = $(params.folder_id).optional.nullable.id().$;
-	if (folderIdErr) return rej('invalid folder_id param');
+	// Get 'folderId' parameter
+	const [folderId, folderIdErr] = $(params.folderId).optional.nullable.id().$;
+	if (folderIdErr) return rej('invalid folderId param');
 
 	if (folderId !== undefined) {
 		if (folderId === null) {
-			file.metadata.folder_id = null;
+			file.metadata.folderId = null;
 		} else {
 			// Fetch folder
 			const folder = await DriveFolder
 				.findOne({
 					_id: folderId,
-					user_id: user._id
+					userId: user._id
 				});
 
 			if (folder === null) {
 				return rej('folder-not-found');
 			}
 
-			file.metadata.folder_id = folder._id;
+			file.metadata.folderId = folder._id;
 		}
 	}
 
 	await DriveFile.update(file._id, {
 		$set: {
 			filename: file.filename,
-			'metadata.folder_id': file.metadata.folder_id
+			'metadata.folderId': file.metadata.folderId
 		}
 	});
 
diff --git a/src/api/endpoints/drive/files/upload_from_url.ts b/src/api/endpoints/drive/files/upload_from_url.ts
index 346633c616..1a4ce0bf08 100644
--- a/src/api/endpoints/drive/files/upload_from_url.ts
+++ b/src/api/endpoints/drive/files/upload_from_url.ts
@@ -18,9 +18,9 @@ module.exports = async (params, user): Promise<any> => {
 	const [url, urlErr] = $(params.url).string().$;
 	if (urlErr) throw 'invalid url param';
 
-	// Get 'folder_id' parameter
-	const [folderId = null, folderIdErr] = $(params.folder_id).optional.nullable.id().$;
-	if (folderIdErr) throw 'invalid folder_id param';
+	// Get 'folderId' parameter
+	const [folderId = null, folderIdErr] = $(params.folderId).optional.nullable.id().$;
+	if (folderIdErr) throw 'invalid folderId param';
 
 	return pack(await uploadFromUrl(url, user, folderId));
 };
diff --git a/src/api/endpoints/drive/folders.ts b/src/api/endpoints/drive/folders.ts
index 428bde3507..c259646352 100644
--- a/src/api/endpoints/drive/folders.ts
+++ b/src/api/endpoints/drive/folders.ts
@@ -30,17 +30,17 @@ module.exports = (params, user, app) => new Promise(async (res, rej) => {
 		return rej('cannot set since_id and until_id');
 	}
 
-	// Get 'folder_id' parameter
-	const [folderId = null, folderIdErr] = $(params.folder_id).optional.nullable.id().$;
-	if (folderIdErr) return rej('invalid folder_id param');
+	// Get 'folderId' parameter
+	const [folderId = null, folderIdErr] = $(params.folderId).optional.nullable.id().$;
+	if (folderIdErr) return rej('invalid folderId param');
 
 	// Construct query
 	const sort = {
 		_id: -1
 	};
 	const query = {
-		user_id: user._id,
-		parent_id: folderId
+		userId: user._id,
+		parentId: folderId
 	} as any;
 	if (sinceId) {
 		sort._id = 1;
diff --git a/src/api/endpoints/drive/folders/create.ts b/src/api/endpoints/drive/folders/create.ts
index 03f396ddc9..564558606d 100644
--- a/src/api/endpoints/drive/folders/create.ts
+++ b/src/api/endpoints/drive/folders/create.ts
@@ -17,9 +17,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	const [name = '無題のフォルダー', nameErr] = $(params.name).optional.string().pipe(isValidFolderName).$;
 	if (nameErr) return rej('invalid name param');
 
-	// Get 'parent_id' parameter
-	const [parentId = null, parentIdErr] = $(params.parent_id).optional.nullable.id().$;
-	if (parentIdErr) return rej('invalid parent_id param');
+	// Get 'parentId' parameter
+	const [parentId = null, parentIdErr] = $(params.parentId).optional.nullable.id().$;
+	if (parentIdErr) return rej('invalid parentId param');
 
 	// If the parent folder is specified
 	let parent = null;
@@ -28,7 +28,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		parent = await DriveFolder
 			.findOne({
 				_id: parentId,
-				user_id: user._id
+				userId: user._id
 			});
 
 		if (parent === null) {
@@ -38,10 +38,10 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Create folder
 	const folder = await DriveFolder.insert({
-		created_at: new Date(),
+		createdAt: new Date(),
 		name: name,
-		parent_id: parent !== null ? parent._id : null,
-		user_id: user._id
+		parentId: parent !== null ? parent._id : null,
+		userId: user._id
 	});
 
 	// Serialize
diff --git a/src/api/endpoints/drive/folders/find.ts b/src/api/endpoints/drive/folders/find.ts
index fc84766bc8..f46aaedd32 100644
--- a/src/api/endpoints/drive/folders/find.ts
+++ b/src/api/endpoints/drive/folders/find.ts
@@ -16,16 +16,16 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	const [name, nameErr] = $(params.name).string().$;
 	if (nameErr) return rej('invalid name param');
 
-	// Get 'parent_id' parameter
-	const [parentId = null, parentIdErr] = $(params.parent_id).optional.nullable.id().$;
-	if (parentIdErr) return rej('invalid parent_id param');
+	// Get 'parentId' parameter
+	const [parentId = null, parentIdErr] = $(params.parentId).optional.nullable.id().$;
+	if (parentIdErr) return rej('invalid parentId param');
 
 	// Issue query
 	const folders = await DriveFolder
 		.find({
 			name: name,
-			user_id: user._id,
-			parent_id: parentId
+			userId: user._id,
+			parentId: parentId
 		});
 
 	// Serialize
diff --git a/src/api/endpoints/drive/folders/show.ts b/src/api/endpoints/drive/folders/show.ts
index e07d14d20d..a6d7e86df1 100644
--- a/src/api/endpoints/drive/folders/show.ts
+++ b/src/api/endpoints/drive/folders/show.ts
@@ -12,15 +12,15 @@ import DriveFolder, { pack } from '../../../models/drive-folder';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'folder_id' parameter
-	const [folderId, folderIdErr] = $(params.folder_id).id().$;
-	if (folderIdErr) return rej('invalid folder_id param');
+	// Get 'folderId' parameter
+	const [folderId, folderIdErr] = $(params.folderId).id().$;
+	if (folderIdErr) return rej('invalid folderId param');
 
 	// Get folder
 	const folder = await DriveFolder
 		.findOne({
 			_id: folderId,
-			user_id: user._id
+			userId: user._id
 		});
 
 	if (folder === null) {
diff --git a/src/api/endpoints/drive/folders/update.ts b/src/api/endpoints/drive/folders/update.ts
index d3df8bdae5..fcfd241241 100644
--- a/src/api/endpoints/drive/folders/update.ts
+++ b/src/api/endpoints/drive/folders/update.ts
@@ -13,15 +13,15 @@ import { publishDriveStream } from '../../../event';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'folder_id' parameter
-	const [folderId, folderIdErr] = $(params.folder_id).id().$;
-	if (folderIdErr) return rej('invalid folder_id param');
+	// Get 'folderId' parameter
+	const [folderId, folderIdErr] = $(params.folderId).id().$;
+	if (folderIdErr) return rej('invalid folderId param');
 
 	// Fetch folder
 	const folder = await DriveFolder
 		.findOne({
 			_id: folderId,
-			user_id: user._id
+			userId: user._id
 		});
 
 	if (folder === null) {
@@ -33,18 +33,18 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	if (nameErr) return rej('invalid name param');
 	if (name) folder.name = name;
 
-	// Get 'parent_id' parameter
-	const [parentId, parentIdErr] = $(params.parent_id).optional.nullable.id().$;
-	if (parentIdErr) return rej('invalid parent_id param');
+	// Get 'parentId' parameter
+	const [parentId, parentIdErr] = $(params.parentId).optional.nullable.id().$;
+	if (parentIdErr) return rej('invalid parentId param');
 	if (parentId !== undefined) {
 		if (parentId === null) {
-			folder.parent_id = null;
+			folder.parentId = null;
 		} else {
 			// Get parent folder
 			const parent = await DriveFolder
 				.findOne({
 					_id: parentId,
-					user_id: user._id
+					userId: user._id
 				});
 
 			if (parent === null) {
@@ -58,25 +58,25 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 					_id: folderId
 				}, {
 					_id: true,
-					parent_id: true
+					parentId: true
 				});
 
 				if (folder2._id.equals(folder._id)) {
 					return true;
-				} else if (folder2.parent_id) {
-					return await checkCircle(folder2.parent_id);
+				} else if (folder2.parentId) {
+					return await checkCircle(folder2.parentId);
 				} else {
 					return false;
 				}
 			}
 
-			if (parent.parent_id !== null) {
-				if (await checkCircle(parent.parent_id)) {
+			if (parent.parentId !== null) {
+				if (await checkCircle(parent.parentId)) {
 					return rej('detected-circular-definition');
 				}
 			}
 
-			folder.parent_id = parent._id;
+			folder.parentId = parent._id;
 		}
 	}
 
@@ -84,7 +84,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	DriveFolder.update(folder._id, {
 		$set: {
 			name: folder.name,
-			parent_id: folder.parent_id
+			parentId: folder.parentId
 		}
 	});
 
diff --git a/src/api/endpoints/drive/stream.ts b/src/api/endpoints/drive/stream.ts
index 8352c7dd4c..0f9cea9f1d 100644
--- a/src/api/endpoints/drive/stream.ts
+++ b/src/api/endpoints/drive/stream.ts
@@ -38,7 +38,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		_id: -1
 	};
 	const query = {
-		'metadata.user_id': user._id
+		'metadata.userId': user._id
 	} as any;
 	if (sinceId) {
 		sort._id = 1;
diff --git a/src/api/endpoints/following/create.ts b/src/api/endpoints/following/create.ts
index 767b837b35..983d8040f9 100644
--- a/src/api/endpoints/following/create.ts
+++ b/src/api/endpoints/following/create.ts
@@ -17,9 +17,9 @@ import event from '../../event';
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	const follower = user;
 
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// 自分自身
 	if (user._id.equals(userId)) {
@@ -42,9 +42,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Check if already following
 	const exist = await Following.findOne({
-		follower_id: follower._id,
-		followee_id: followee._id,
-		deleted_at: { $exists: false }
+		followerId: follower._id,
+		followeeId: followee._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist !== null) {
@@ -53,9 +53,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Create following
 	await Following.insert({
-		created_at: new Date(),
-		follower_id: follower._id,
-		followee_id: followee._id
+		createdAt: new Date(),
+		followerId: follower._id,
+		followeeId: followee._id
 	});
 
 	// Send response
@@ -64,14 +64,14 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Increment following count
 	User.update(follower._id, {
 		$inc: {
-			following_count: 1
+			followingCount: 1
 		}
 	});
 
 	// Increment followers count
 	User.update({ _id: followee._id }, {
 		$inc: {
-			followers_count: 1
+			followersCount: 1
 		}
 	});
 
diff --git a/src/api/endpoints/following/delete.ts b/src/api/endpoints/following/delete.ts
index 64b9a8cecb..25eba8b262 100644
--- a/src/api/endpoints/following/delete.ts
+++ b/src/api/endpoints/following/delete.ts
@@ -16,9 +16,9 @@ import event from '../../event';
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	const follower = user;
 
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Check if the followee is yourself
 	if (user._id.equals(userId)) {
@@ -41,9 +41,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Check not following
 	const exist = await Following.findOne({
-		follower_id: follower._id,
-		followee_id: followee._id,
-		deleted_at: { $exists: false }
+		followerId: follower._id,
+		followeeId: followee._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist === null) {
@@ -55,7 +55,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		_id: exist._id
 	}, {
 		$set: {
-			deleted_at: new Date()
+			deletedAt: new Date()
 		}
 	});
 
@@ -65,14 +65,14 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Decrement following count
 	User.update({ _id: follower._id }, {
 		$inc: {
-			following_count: -1
+			followingCount: -1
 		}
 	});
 
 	// Decrement followers count
 	User.update({ _id: followee._id }, {
 		$inc: {
-			followers_count: -1
+			followersCount: -1
 		}
 	});
 
diff --git a/src/api/endpoints/i.ts b/src/api/endpoints/i.ts
index 32b0382faf..f5e92b4ded 100644
--- a/src/api/endpoints/i.ts
+++ b/src/api/endpoints/i.ts
@@ -22,7 +22,7 @@ module.exports = (params, user, _, isSecure) => new Promise(async (res, rej) =>
 	// Update lastUsedAt
 	User.update({ _id: user._id }, {
 		$set: {
-			'account.last_used_at': new Date()
+			'account.lastUsedAt': new Date()
 		}
 	});
 });
diff --git a/src/api/endpoints/i/2fa/done.ts b/src/api/endpoints/i/2fa/done.ts
index 0f1db73829..d61ebbe6f9 100644
--- a/src/api/endpoints/i/2fa/done.ts
+++ b/src/api/endpoints/i/2fa/done.ts
@@ -12,12 +12,12 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	const _token = token.replace(/\s/g, '');
 
-	if (user.two_factor_temp_secret == null) {
+	if (user.twoFactorTempSecret == null) {
 		return rej('二段階認証の設定が開始されていません');
 	}
 
 	const verified = (speakeasy as any).totp.verify({
-		secret: user.two_factor_temp_secret,
+		secret: user.twoFactorTempSecret,
 		encoding: 'base32',
 		token: _token
 	});
@@ -28,8 +28,8 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	await User.update(user._id, {
 		$set: {
-			'account.two_factor_secret': user.two_factor_temp_secret,
-			'account.two_factor_enabled': true
+			'account.twoFactorSecret': user.twoFactorTempSecret,
+			'account.twoFactorEnabled': true
 		}
 	});
 
diff --git a/src/api/endpoints/i/2fa/register.ts b/src/api/endpoints/i/2fa/register.ts
index 24abfcdfc5..b498a2414e 100644
--- a/src/api/endpoints/i/2fa/register.ts
+++ b/src/api/endpoints/i/2fa/register.ts
@@ -27,7 +27,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	await User.update(user._id, {
 		$set: {
-			two_factor_temp_secret: secret.base32
+			twoFactorTempSecret: secret.base32
 		}
 	});
 
diff --git a/src/api/endpoints/i/2fa/unregister.ts b/src/api/endpoints/i/2fa/unregister.ts
index c43f9ccc44..0221ecb96d 100644
--- a/src/api/endpoints/i/2fa/unregister.ts
+++ b/src/api/endpoints/i/2fa/unregister.ts
@@ -19,8 +19,8 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	await User.update(user._id, {
 		$set: {
-			'account.two_factor_secret': null,
-			'account.two_factor_enabled': false
+			'account.twoFactorSecret': null,
+			'account.twoFactorEnabled': false
 		}
 	});
 
diff --git a/src/api/endpoints/i/appdata/get.ts b/src/api/endpoints/i/appdata/get.ts
index 571208d46c..0b34643f75 100644
--- a/src/api/endpoints/i/appdata/get.ts
+++ b/src/api/endpoints/i/appdata/get.ts
@@ -25,8 +25,8 @@ module.exports = (params, user, app) => new Promise(async (res, rej) => {
 		select[`data.${key}`] = true;
 	}
 	const appdata = await Appdata.findOne({
-		app_id: app._id,
-		user_id: user._id
+		appId: app._id,
+		userId: user._id
 	}, {
 		fields: select
 	});
diff --git a/src/api/endpoints/i/appdata/set.ts b/src/api/endpoints/i/appdata/set.ts
index 2804a14cb3..1e3232ce3d 100644
--- a/src/api/endpoints/i/appdata/set.ts
+++ b/src/api/endpoints/i/appdata/set.ts
@@ -43,11 +43,11 @@ module.exports = (params, user, app) => new Promise(async (res, rej) => {
 	}
 
 	await Appdata.update({
-		app_id: app._id,
-		user_id: user._id
+		appId: app._id,
+		userId: user._id
 	}, Object.assign({
-		app_id: app._id,
-		user_id: user._id
+		appId: app._id,
+		userId: user._id
 	}, {
 			$set: set
 		}), {
diff --git a/src/api/endpoints/i/authorized_apps.ts b/src/api/endpoints/i/authorized_apps.ts
index 40ce7a68c8..5a38d7c18f 100644
--- a/src/api/endpoints/i/authorized_apps.ts
+++ b/src/api/endpoints/i/authorized_apps.ts
@@ -28,7 +28,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Get tokens
 	const tokens = await AccessToken
 		.find({
-			user_id: user._id
+			userId: user._id
 		}, {
 			limit: limit,
 			skip: offset,
@@ -39,5 +39,5 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Serialize
 	res(await Promise.all(tokens.map(async token =>
-		await pack(token.app_id))));
+		await pack(token.appId))));
 });
diff --git a/src/api/endpoints/i/favorites.ts b/src/api/endpoints/i/favorites.ts
index eb464cf0f0..22a4399540 100644
--- a/src/api/endpoints/i/favorites.ts
+++ b/src/api/endpoints/i/favorites.ts
@@ -28,7 +28,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Get favorites
 	const favorites = await Favorite
 		.find({
-			user_id: user._id
+			userId: user._id
 		}, {
 			limit: limit,
 			skip: offset,
diff --git a/src/api/endpoints/i/notifications.ts b/src/api/endpoints/i/notifications.ts
index 688039a0dd..e3447c17ec 100644
--- a/src/api/endpoints/i/notifications.ts
+++ b/src/api/endpoints/i/notifications.ts
@@ -47,15 +47,15 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	}
 
 	const mute = await Mute.find({
-		muter_id: user._id,
-		deleted_at: { $exists: false }
+		muterId: user._id,
+		deletedAt: { $exists: false }
 	});
 
 	const query = {
-		notifiee_id: user._id,
+		notifieeId: user._id,
 		$and: [{
-			notifier_id: {
-				$nin: mute.map(m => m.mutee_id)
+			notifierId: {
+				$nin: mute.map(m => m.muteeId)
 			}
 		}]
 	} as any;
@@ -69,7 +69,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		const followingIds = await getFriends(user._id);
 
 		query.$and.push({
-			notifier_id: {
+			notifierId: {
 				$in: followingIds
 			}
 		});
diff --git a/src/api/endpoints/i/pin.ts b/src/api/endpoints/i/pin.ts
index ff546fc2bd..886a3edeb5 100644
--- a/src/api/endpoints/i/pin.ts
+++ b/src/api/endpoints/i/pin.ts
@@ -14,14 +14,14 @@ import { pack } from '../../models/user';
  * @return {Promise<any>}
  */
 module.exports = async (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Fetch pinee
 	const post = await Post.findOne({
 		_id: postId,
-		user_id: user._id
+		userId: user._id
 	});
 
 	if (post === null) {
@@ -30,7 +30,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 	await User.update(user._id, {
 		$set: {
-			pinned_post_id: post._id
+			pinnedPostId: post._id
 		}
 	});
 
diff --git a/src/api/endpoints/i/signin_history.ts b/src/api/endpoints/i/signin_history.ts
index 859e81653d..5b794d0a4b 100644
--- a/src/api/endpoints/i/signin_history.ts
+++ b/src/api/endpoints/i/signin_history.ts
@@ -30,7 +30,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	}
 
 	const query = {
-		user_id: user._id
+		userId: user._id
 	} as any;
 
 	const sort = {
diff --git a/src/api/endpoints/i/update.ts b/src/api/endpoints/i/update.ts
index db8a3f25bd..6645751871 100644
--- a/src/api/endpoints/i/update.ts
+++ b/src/api/endpoints/i/update.ts
@@ -36,20 +36,20 @@ module.exports = async (params, user, _, isSecure) => new Promise(async (res, re
 	if (birthdayErr) return rej('invalid birthday param');
 	if (birthday !== undefined) user.account.profile.birthday = birthday;
 
-	// Get 'avatar_id' parameter
-	const [avatarId, avatarIdErr] = $(params.avatar_id).optional.id().$;
-	if (avatarIdErr) return rej('invalid avatar_id param');
-	if (avatarId) user.avatar_id = avatarId;
+	// Get 'avatarId' parameter
+	const [avatarId, avatarIdErr] = $(params.avatarId).optional.id().$;
+	if (avatarIdErr) return rej('invalid avatarId param');
+	if (avatarId) user.avatarId = avatarId;
 
-	// Get 'banner_id' parameter
-	const [bannerId, bannerIdErr] = $(params.banner_id).optional.id().$;
-	if (bannerIdErr) return rej('invalid banner_id param');
-	if (bannerId) user.banner_id = bannerId;
+	// Get 'bannerId' parameter
+	const [bannerId, bannerIdErr] = $(params.bannerId).optional.id().$;
+	if (bannerIdErr) return rej('invalid bannerId param');
+	if (bannerId) user.bannerId = bannerId;
 
-	// Get 'is_bot' parameter
-	const [isBot, isBotErr] = $(params.is_bot).optional.boolean().$;
-	if (isBotErr) return rej('invalid is_bot param');
-	if (isBot != null) user.account.is_bot = isBot;
+	// Get 'isBot' parameter
+	const [isBot, isBotErr] = $(params.isBot).optional.boolean().$;
+	if (isBotErr) return rej('invalid isBot param');
+	if (isBot != null) user.account.isBot = isBot;
 
 	// Get 'auto_watch' parameter
 	const [autoWatch, autoWatchErr] = $(params.auto_watch).optional.boolean().$;
@@ -60,10 +60,10 @@ module.exports = async (params, user, _, isSecure) => new Promise(async (res, re
 		$set: {
 			name: user.name,
 			description: user.description,
-			avatar_id: user.avatar_id,
-			banner_id: user.banner_id,
+			avatarId: user.avatarId,
+			bannerId: user.bannerId,
 			'account.profile': user.account.profile,
-			'account.is_bot': user.account.is_bot,
+			'account.isBot': user.account.isBot,
 			'account.settings': user.account.settings
 		}
 	});
diff --git a/src/api/endpoints/i/update_client_setting.ts b/src/api/endpoints/i/update_client_setting.ts
index c772ed5dc3..a0bef5e595 100644
--- a/src/api/endpoints/i/update_client_setting.ts
+++ b/src/api/endpoints/i/update_client_setting.ts
@@ -22,14 +22,14 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 	if (valueErr) return rej('invalid value param');
 
 	const x = {};
-	x[`account.client_settings.${name}`] = value;
+	x[`account.clientSettings.${name}`] = value;
 
 	await User.update(user._id, {
 		$set: x
 	});
 
 	// Serialize
-	user.account.client_settings[name] = value;
+	user.account.clientSettings[name] = value;
 	const iObj = await pack(user, user, {
 		detail: true,
 		includeSecrets: true
diff --git a/src/api/endpoints/i/update_home.ts b/src/api/endpoints/i/update_home.ts
index 9ce44e25ee..151c3e205f 100644
--- a/src/api/endpoints/i/update_home.ts
+++ b/src/api/endpoints/i/update_home.ts
@@ -26,7 +26,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 	if (home) {
 		await User.update(user._id, {
 			$set: {
-				'account.client_settings.home': home
+				'account.clientSettings.home': home
 			}
 		});
 
@@ -38,7 +38,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 	} else {
 		if (id == null && data == null) return rej('you need to set id and data params if home param unset');
 
-		const _home = user.account.client_settings.home;
+		const _home = user.account.clientSettings.home;
 		const widget = _home.find(w => w.id == id);
 
 		if (widget == null) return rej('widget not found');
@@ -47,7 +47,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 		await User.update(user._id, {
 			$set: {
-				'account.client_settings.home': _home
+				'account.clientSettings.home': _home
 			}
 		});
 
diff --git a/src/api/endpoints/i/update_mobile_home.ts b/src/api/endpoints/i/update_mobile_home.ts
index 1daddf42b9..a8436b940f 100644
--- a/src/api/endpoints/i/update_mobile_home.ts
+++ b/src/api/endpoints/i/update_mobile_home.ts
@@ -25,7 +25,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 	if (home) {
 		await User.update(user._id, {
 			$set: {
-				'account.client_settings.mobile_home': home
+				'account.clientSettings.mobile_home': home
 			}
 		});
 
@@ -37,7 +37,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 	} else {
 		if (id == null && data == null) return rej('you need to set id and data params if home param unset');
 
-		const _home = user.account.client_settings.mobile_home || [];
+		const _home = user.account.clientSettings.mobile_home || [];
 		const widget = _home.find(w => w.id == id);
 
 		if (widget == null) return rej('widget not found');
@@ -46,7 +46,7 @@ module.exports = async (params, user) => new Promise(async (res, rej) => {
 
 		await User.update(user._id, {
 			$set: {
-				'account.client_settings.mobile_home': _home
+				'account.clientSettings.mobile_home': _home
 			}
 		});
 
diff --git a/src/api/endpoints/messaging/history.ts b/src/api/endpoints/messaging/history.ts
index 1683ca7a89..2bf3ed996d 100644
--- a/src/api/endpoints/messaging/history.ts
+++ b/src/api/endpoints/messaging/history.ts
@@ -19,25 +19,25 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	if (limitErr) return rej('invalid limit param');
 
 	const mute = await Mute.find({
-		muter_id: user._id,
-		deleted_at: { $exists: false }
+		muterId: user._id,
+		deletedAt: { $exists: false }
 	});
 
 	// Get history
 	const history = await History
 		.find({
-			user_id: user._id,
-			partner: {
-				$nin: mute.map(m => m.mutee_id)
+			userId: user._id,
+			partnerId: {
+				$nin: mute.map(m => m.muteeId)
 			}
 		}, {
 			limit: limit,
 			sort: {
-				updated_at: -1
+				updatedAt: -1
 			}
 		});
 
 	// Serialize
 	res(await Promise.all(history.map(async h =>
-		await pack(h.message, user))));
+		await pack(h.messageId, user))));
 });
diff --git a/src/api/endpoints/messaging/messages.ts b/src/api/endpoints/messaging/messages.ts
index 67ba5e9d6d..ba8ca7d1c2 100644
--- a/src/api/endpoints/messaging/messages.ts
+++ b/src/api/endpoints/messaging/messages.ts
@@ -15,9 +15,9 @@ import read from '../../common/read-messaging-message';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [recipientId, recipientIdErr] = $(params.user_id).id().$;
-	if (recipientIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [recipientId, recipientIdErr] = $(params.userId).id().$;
+	if (recipientIdErr) return rej('invalid userId param');
 
 	// Fetch recipient
 	const recipient = await User.findOne({
@@ -55,11 +55,11 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	const query = {
 		$or: [{
-			user_id: user._id,
-			recipient_id: recipient._id
+			userId: user._id,
+			recipientId: recipient._id
 		}, {
-			user_id: recipient._id,
-			recipient_id: user._id
+			userId: recipient._id,
+			recipientId: user._id
 		}]
 	} as any;
 
diff --git a/src/api/endpoints/messaging/messages/create.ts b/src/api/endpoints/messaging/messages/create.ts
index 1b8a5f59e6..b94a90678e 100644
--- a/src/api/endpoints/messaging/messages/create.ts
+++ b/src/api/endpoints/messaging/messages/create.ts
@@ -21,9 +21,9 @@ import config from '../../../../conf';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [recipientId, recipientIdErr] = $(params.user_id).id().$;
-	if (recipientIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [recipientId, recipientIdErr] = $(params.userId).id().$;
+	if (recipientIdErr) return rej('invalid userId param');
 
 	// Myself
 	if (recipientId.equals(user._id)) {
@@ -47,15 +47,15 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	const [text, textErr] = $(params.text).optional.string().pipe(isValidText).$;
 	if (textErr) return rej('invalid text');
 
-	// Get 'file_id' parameter
-	const [fileId, fileIdErr] = $(params.file_id).optional.id().$;
-	if (fileIdErr) return rej('invalid file_id param');
+	// Get 'fileId' parameter
+	const [fileId, fileIdErr] = $(params.fileId).optional.id().$;
+	if (fileIdErr) return rej('invalid fileId param');
 
 	let file = null;
 	if (fileId !== undefined) {
 		file = await DriveFile.findOne({
 			_id: fileId,
-			'metadata.user_id': user._id
+			'metadata.userId': user._id
 		});
 
 		if (file === null) {
@@ -70,12 +70,12 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// メッセージを作成
 	const message = await Message.insert({
-		created_at: new Date(),
-		file_id: file ? file._id : undefined,
-		recipient_id: recipient._id,
+		createdAt: new Date(),
+		fileId: file ? file._id : undefined,
+		recipientId: recipient._id,
 		text: text ? text : undefined,
-		user_id: user._id,
-		is_read: false
+		userId: user._id,
+		isRead: false
 	});
 
 	// Serialize
@@ -85,32 +85,32 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	res(messageObj);
 
 	// 自分のストリーム
-	publishMessagingStream(message.user_id, message.recipient_id, 'message', messageObj);
-	publishMessagingIndexStream(message.user_id, 'message', messageObj);
-	publishUserStream(message.user_id, 'messaging_message', messageObj);
+	publishMessagingStream(message.userId, message.recipientId, 'message', messageObj);
+	publishMessagingIndexStream(message.userId, 'message', messageObj);
+	publishUserStream(message.userId, 'messaging_message', messageObj);
 
 	// 相手のストリーム
-	publishMessagingStream(message.recipient_id, message.user_id, 'message', messageObj);
-	publishMessagingIndexStream(message.recipient_id, 'message', messageObj);
-	publishUserStream(message.recipient_id, 'messaging_message', messageObj);
+	publishMessagingStream(message.recipientId, message.userId, 'message', messageObj);
+	publishMessagingIndexStream(message.recipientId, 'message', messageObj);
+	publishUserStream(message.recipientId, 'messaging_message', messageObj);
 
 	// 3秒経っても(今回作成した)メッセージが既読にならなかったら「未読のメッセージがありますよ」イベントを発行する
 	setTimeout(async () => {
-		const freshMessage = await Message.findOne({ _id: message._id }, { is_read: true });
-		if (!freshMessage.is_read) {
+		const freshMessage = await Message.findOne({ _id: message._id }, { isRead: true });
+		if (!freshMessage.isRead) {
 			//#region ただしミュートされているなら発行しない
 			const mute = await Mute.find({
-				muter_id: recipient._id,
-				deleted_at: { $exists: false }
+				muterId: recipient._id,
+				deletedAt: { $exists: false }
 			});
-			const mutedUserIds = mute.map(m => m.mutee_id.toString());
+			const mutedUserIds = mute.map(m => m.muteeId.toString());
 			if (mutedUserIds.indexOf(user._id.toString()) != -1) {
 				return;
 			}
 			//#endregion
 
-			publishUserStream(message.recipient_id, 'unread_messaging_message', messageObj);
-			pushSw(message.recipient_id, 'unread_messaging_message', messageObj);
+			publishUserStream(message.recipientId, 'unread_messaging_message', messageObj);
+			pushSw(message.recipientId, 'unread_messaging_message', messageObj);
 		}
 	}, 3000);
 
@@ -130,26 +130,26 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// 履歴作成(自分)
 	History.update({
-		user_id: user._id,
-		partner: recipient._id
+		userId: user._id,
+		partnerId: recipient._id
 	}, {
-		updated_at: new Date(),
-		user_id: user._id,
-		partner: recipient._id,
-		message: message._id
+		updatedAt: new Date(),
+		userId: user._id,
+		partnerId: recipient._id,
+		messageId: message._id
 	}, {
 		upsert: true
 	});
 
 	// 履歴作成(相手)
 	History.update({
-		user_id: recipient._id,
-		partner: user._id
+		userId: recipient._id,
+		partnerId: user._id
 	}, {
-		updated_at: new Date(),
-		user_id: recipient._id,
-		partner: user._id,
-		message: message._id
+		updatedAt: new Date(),
+		userId: recipient._id,
+		partnerId: user._id,
+		messageId: message._id
 	}, {
 		upsert: true
 	});
diff --git a/src/api/endpoints/messaging/unread.ts b/src/api/endpoints/messaging/unread.ts
index c4326e1d22..f7f4047b67 100644
--- a/src/api/endpoints/messaging/unread.ts
+++ b/src/api/endpoints/messaging/unread.ts
@@ -13,18 +13,18 @@ import Mute from '../../models/mute';
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	const mute = await Mute.find({
-		muter_id: user._id,
-		deleted_at: { $exists: false }
+		muterId: user._id,
+		deletedAt: { $exists: false }
 	});
-	const mutedUserIds = mute.map(m => m.mutee_id);
+	const mutedUserIds = mute.map(m => m.muteeId);
 
 	const count = await Message
 		.count({
-			user_id: {
+			userId: {
 				$nin: mutedUserIds
 			},
-			recipient_id: user._id,
-			is_read: false
+			recipientId: user._id,
+			isRead: false
 		});
 
 	res({
diff --git a/src/api/endpoints/mute/create.ts b/src/api/endpoints/mute/create.ts
index f99b40d32e..e860235086 100644
--- a/src/api/endpoints/mute/create.ts
+++ b/src/api/endpoints/mute/create.ts
@@ -15,9 +15,9 @@ import Mute from '../../models/mute';
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	const muter = user;
 
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// 自分自身
 	if (user._id.equals(userId)) {
@@ -40,9 +40,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Check if already muting
 	const exist = await Mute.findOne({
-		muter_id: muter._id,
-		mutee_id: mutee._id,
-		deleted_at: { $exists: false }
+		muterId: muter._id,
+		muteeId: mutee._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist !== null) {
@@ -51,9 +51,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Create mute
 	await Mute.insert({
-		created_at: new Date(),
-		muter_id: muter._id,
-		mutee_id: mutee._id,
+		createdAt: new Date(),
+		muterId: muter._id,
+		muteeId: mutee._id,
 	});
 
 	// Send response
diff --git a/src/api/endpoints/mute/delete.ts b/src/api/endpoints/mute/delete.ts
index 36e2fd101a..7e361b4792 100644
--- a/src/api/endpoints/mute/delete.ts
+++ b/src/api/endpoints/mute/delete.ts
@@ -15,9 +15,9 @@ import Mute from '../../models/mute';
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	const muter = user;
 
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Check if the mutee is yourself
 	if (user._id.equals(userId)) {
@@ -40,9 +40,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Check not muting
 	const exist = await Mute.findOne({
-		muter_id: muter._id,
-		mutee_id: mutee._id,
-		deleted_at: { $exists: false }
+		muterId: muter._id,
+		muteeId: mutee._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist === null) {
@@ -54,7 +54,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		_id: exist._id
 	}, {
 		$set: {
-			deleted_at: new Date()
+			deletedAt: new Date()
 		}
 	});
 
diff --git a/src/api/endpoints/mute/list.ts b/src/api/endpoints/mute/list.ts
index 19e3b157e6..3401fba64d 100644
--- a/src/api/endpoints/mute/list.ts
+++ b/src/api/endpoints/mute/list.ts
@@ -28,15 +28,15 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Construct query
 	const query = {
-		muter_id: me._id,
-		deleted_at: { $exists: false }
+		muterId: me._id,
+		deletedAt: { $exists: false }
 	} as any;
 
 	if (iknow) {
 		// Get my friends
 		const myFriends = await getFriends(me._id);
 
-		query.mutee_id = {
+		query.muteeId = {
 			$in: myFriends
 		};
 	}
@@ -63,7 +63,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Serialize
 	const users = await Promise.all(mutes.map(async m =>
-		await pack(m.mutee_id, me, { detail: true })));
+		await pack(m.muteeId, me, { detail: true })));
 
 	// Response
 	res({
diff --git a/src/api/endpoints/my/apps.ts b/src/api/endpoints/my/apps.ts
index b236190506..bc1290cac6 100644
--- a/src/api/endpoints/my/apps.ts
+++ b/src/api/endpoints/my/apps.ts
@@ -21,7 +21,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	if (offsetErr) return rej('invalid offset param');
 
 	const query = {
-		user_id: user._id
+		userId: user._id
 	};
 
 	// Execute query
diff --git a/src/api/endpoints/notifications/get_unread_count.ts b/src/api/endpoints/notifications/get_unread_count.ts
index 845d6b29ce..8f9719fff6 100644
--- a/src/api/endpoints/notifications/get_unread_count.ts
+++ b/src/api/endpoints/notifications/get_unread_count.ts
@@ -13,18 +13,18 @@ import Mute from '../../models/mute';
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	const mute = await Mute.find({
-		muter_id: user._id,
-		deleted_at: { $exists: false }
+		muterId: user._id,
+		deletedAt: { $exists: false }
 	});
-	const mutedUserIds = mute.map(m => m.mutee_id);
+	const mutedUserIds = mute.map(m => m.muteeId);
 
 	const count = await Notification
 		.count({
-			notifiee_id: user._id,
-			notifier_id: {
+			notifieeId: user._id,
+			notifierId: {
 				$nin: mutedUserIds
 			},
-			is_read: false
+			isRead: false
 		});
 
 	res({
diff --git a/src/api/endpoints/notifications/mark_as_read_all.ts b/src/api/endpoints/notifications/mark_as_read_all.ts
index 3550e344c4..693de3d0ef 100644
--- a/src/api/endpoints/notifications/mark_as_read_all.ts
+++ b/src/api/endpoints/notifications/mark_as_read_all.ts
@@ -14,11 +14,11 @@ import event from '../../event';
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Update documents
 	await Notification.update({
-		notifiee_id: user._id,
-		is_read: false
+		notifieeId: user._id,
+		isRead: false
 	}, {
 		$set: {
-			is_read: true
+			isRead: true
 		}
 	}, {
 		multi: true
diff --git a/src/api/endpoints/othello/games.ts b/src/api/endpoints/othello/games.ts
index f6e38b8d87..5c71f98828 100644
--- a/src/api/endpoints/othello/games.ts
+++ b/src/api/endpoints/othello/games.ts
@@ -24,14 +24,14 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	}
 
 	const q: any = my ? {
-		is_started: true,
+		isStarted: true,
 		$or: [{
-			user1_id: user._id
+			user1Id: user._id
 		}, {
-			user2_id: user._id
+			user2Id: user._id
 		}]
 	} : {
-		is_started: true
+		isStarted: true
 	};
 
 	const sort = {
diff --git a/src/api/endpoints/othello/games/show.ts b/src/api/endpoints/othello/games/show.ts
index c7bd74a39a..19f5d0fef0 100644
--- a/src/api/endpoints/othello/games/show.ts
+++ b/src/api/endpoints/othello/games/show.ts
@@ -14,9 +14,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	}
 
 	const o = new Othello(game.settings.map, {
-		isLlotheo: game.settings.is_llotheo,
-		canPutEverywhere: game.settings.can_put_everywhere,
-		loopedBoard: game.settings.looped_board
+		isLlotheo: game.settings.isLlotheo,
+		canPutEverywhere: game.settings.canPutEverywhere,
+		loopedBoard: game.settings.loopedBoard
 	});
 
 	game.logs.forEach(log => {
diff --git a/src/api/endpoints/othello/invitations.ts b/src/api/endpoints/othello/invitations.ts
index 02fb421fbc..f6e0071a6c 100644
--- a/src/api/endpoints/othello/invitations.ts
+++ b/src/api/endpoints/othello/invitations.ts
@@ -3,7 +3,7 @@ import Matching, { pack as packMatching } from '../../models/othello-matching';
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Find session
 	const invitations = await Matching.find({
-		child_id: user._id
+		childId: user._id
 	}, {
 		sort: {
 			_id: -1
diff --git a/src/api/endpoints/othello/match.ts b/src/api/endpoints/othello/match.ts
index f73386ba7c..f503c5834c 100644
--- a/src/api/endpoints/othello/match.ts
+++ b/src/api/endpoints/othello/match.ts
@@ -6,19 +6,19 @@ import publishUserStream, { publishOthelloStream } from '../../event';
 import { eighteight } from '../../../common/othello/maps';
 
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [childId, childIdErr] = $(params.user_id).id().$;
-	if (childIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [childId, childIdErr] = $(params.userId).id().$;
+	if (childIdErr) return rej('invalid userId param');
 
 	// Myself
 	if (childId.equals(user._id)) {
-		return rej('invalid user_id param');
+		return rej('invalid userId param');
 	}
 
 	// Find session
 	const exist = await Matching.findOne({
-		parent_id: childId,
-		child_id: user._id
+		parentId: childId,
+		childId: user._id
 	});
 
 	if (exist) {
@@ -29,28 +29,28 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 		// Create game
 		const game = await OthelloGame.insert({
-			created_at: new Date(),
-			user1_id: exist.parent_id,
-			user2_id: user._id,
-			user1_accepted: false,
-			user2_accepted: false,
-			is_started: false,
-			is_ended: false,
+			createdAt: new Date(),
+			user1Id: exist.parentId,
+			user2Id: user._id,
+			user1Accepted: false,
+			user2Accepted: false,
+			isStarted: false,
+			isEnded: false,
 			logs: [],
 			settings: {
 				map: eighteight.data,
 				bw: 'random',
-				is_llotheo: false
+				isLlotheo: false
 			}
 		});
 
 		// Reponse
 		res(await packGame(game, user));
 
-		publishOthelloStream(exist.parent_id, 'matched', await packGame(game, exist.parent_id));
+		publishOthelloStream(exist.parentId, 'matched', await packGame(game, exist.parentId));
 
 		const other = await Matching.count({
-			child_id: user._id
+			childId: user._id
 		});
 
 		if (other == 0) {
@@ -72,14 +72,14 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 		// 以前のセッションはすべて削除しておく
 		await Matching.remove({
-			parent_id: user._id
+			parentId: user._id
 		});
 
 		// セッションを作成
 		const matching = await Matching.insert({
-			created_at: new Date(),
-			parent_id: user._id,
-			child_id: child._id
+			createdAt: new Date(),
+			parentId: user._id,
+			childId: child._id
 		});
 
 		// Reponse
diff --git a/src/api/endpoints/othello/match/cancel.ts b/src/api/endpoints/othello/match/cancel.ts
index 6f751ef835..ee0f82a611 100644
--- a/src/api/endpoints/othello/match/cancel.ts
+++ b/src/api/endpoints/othello/match/cancel.ts
@@ -2,7 +2,7 @@ import Matching from '../../../models/othello-matching';
 
 module.exports = (params, user) => new Promise(async (res, rej) => {
 	await Matching.remove({
-		parent_id: user._id
+		parentId: user._id
 	});
 
 	res();
diff --git a/src/api/endpoints/posts.ts b/src/api/endpoints/posts.ts
index 7df744d2a3..7e9ff3ad74 100644
--- a/src/api/endpoints/posts.ts
+++ b/src/api/endpoints/posts.ts
@@ -65,15 +65,15 @@ module.exports = (params) => new Promise(async (res, rej) => {
 	}
 
 	if (reply != undefined) {
-		query.reply_id = reply ? { $exists: true, $ne: null } : null;
+		query.replyId = reply ? { $exists: true, $ne: null } : null;
 	}
 
 	if (repost != undefined) {
-		query.repost_id = repost ? { $exists: true, $ne: null } : null;
+		query.repostId = repost ? { $exists: true, $ne: null } : null;
 	}
 
 	if (media != undefined) {
-		query.media_ids = media ? { $exists: true, $ne: null } : null;
+		query.mediaIds = media ? { $exists: true, $ne: null } : null;
 	}
 
 	if (poll != undefined) {
@@ -82,7 +82,7 @@ module.exports = (params) => new Promise(async (res, rej) => {
 
 	// TODO
 	//if (bot != undefined) {
-	//	query.is_bot = bot;
+	//	query.isBot = bot;
 	//}
 
 	// Issue query
diff --git a/src/api/endpoints/posts/categorize.ts b/src/api/endpoints/posts/categorize.ts
index 0c85c2b4e0..0436c8e697 100644
--- a/src/api/endpoints/posts/categorize.ts
+++ b/src/api/endpoints/posts/categorize.ts
@@ -12,13 +12,13 @@ import Post from '../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	if (!user.account.is_pro) {
+	if (!user.account.isPro) {
 		return rej('This endpoint is available only from a Pro account');
 	}
 
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get categorizee
 	const post = await Post.findOne({
diff --git a/src/api/endpoints/posts/context.ts b/src/api/endpoints/posts/context.ts
index 5ba3758975..44a77d102e 100644
--- a/src/api/endpoints/posts/context.ts
+++ b/src/api/endpoints/posts/context.ts
@@ -12,9 +12,9 @@ import Post, { pack } from '../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get 'limit' parameter
 	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
@@ -48,13 +48,13 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 			return;
 		}
 
-		if (p.reply_id) {
-			await get(p.reply_id);
+		if (p.replyId) {
+			await get(p.replyId);
 		}
 	}
 
-	if (post.reply_id) {
-		await get(post.reply_id);
+	if (post.replyId) {
+		await get(post.replyId);
 	}
 
 	// Serialize
diff --git a/src/api/endpoints/posts/create.ts b/src/api/endpoints/posts/create.ts
index 286e18bb76..2a3d974fe8 100644
--- a/src/api/endpoints/posts/create.ts
+++ b/src/api/endpoints/posts/create.ts
@@ -33,9 +33,9 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 	const [text, textErr] = $(params.text).optional.string().pipe(isValidText).$;
 	if (textErr) return rej('invalid text');
 
-	// Get 'via_mobile' parameter
-	const [viaMobile = false, viaMobileErr] = $(params.via_mobile).optional.boolean().$;
-	if (viaMobileErr) return rej('invalid via_mobile');
+	// Get 'viaMobile' parameter
+	const [viaMobile = false, viaMobileErr] = $(params.viaMobile).optional.boolean().$;
+	if (viaMobileErr) return rej('invalid viaMobile');
 
 	// Get 'tags' parameter
 	const [tags = [], tagsErr] = $(params.tags).optional.array('string').unique().eachQ(t => t.range(1, 32)).$;
@@ -53,9 +53,9 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		.$;
 	if (geoErr) return rej('invalid geo');
 
-	// Get 'media_ids' parameter
-	const [mediaIds, mediaIdsErr] = $(params.media_ids).optional.array('id').unique().range(1, 4).$;
-	if (mediaIdsErr) return rej('invalid media_ids');
+	// Get 'mediaIds' parameter
+	const [mediaIds, mediaIdsErr] = $(params.mediaIds).optional.array('id').unique().range(1, 4).$;
+	if (mediaIdsErr) return rej('invalid mediaIds');
 
 	let files = [];
 	if (mediaIds !== undefined) {
@@ -67,7 +67,7 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 			// SELECT _id
 			const entity = await DriveFile.findOne({
 				_id: mediaId,
-				'metadata.user_id': user._id
+				'metadata.userId': user._id
 			});
 
 			if (entity === null) {
@@ -80,9 +80,9 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		files = null;
 	}
 
-	// Get 'repost_id' parameter
-	const [repostId, repostIdErr] = $(params.repost_id).optional.id().$;
-	if (repostIdErr) return rej('invalid repost_id');
+	// Get 'repostId' parameter
+	const [repostId, repostIdErr] = $(params.repostId).optional.id().$;
+	if (repostIdErr) return rej('invalid repostId');
 
 	let repost: IPost = null;
 	let isQuote = false;
@@ -94,13 +94,13 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 
 		if (repost == null) {
 			return rej('repostee is not found');
-		} else if (repost.repost_id && !repost.text && !repost.media_ids) {
+		} else if (repost.repostId && !repost.text && !repost.mediaIds) {
 			return rej('cannot repost to repost');
 		}
 
 		// Fetch recently post
 		const latestPost = await Post.findOne({
-			user_id: user._id
+			userId: user._id
 		}, {
 			sort: {
 				_id: -1
@@ -111,8 +111,8 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 
 		// 直近と同じRepost対象かつ引用じゃなかったらエラー
 		if (latestPost &&
-			latestPost.repost_id &&
-			latestPost.repost_id.equals(repost._id) &&
+			latestPost.repostId &&
+			latestPost.repostId.equals(repost._id) &&
 			!isQuote) {
 			return rej('cannot repost same post that already reposted in your latest post');
 		}
@@ -125,9 +125,9 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		}
 	}
 
-	// Get 'reply_id' parameter
-	const [replyId, replyIdErr] = $(params.reply_id).optional.id().$;
-	if (replyIdErr) return rej('invalid reply_id');
+	// Get 'replyId' parameter
+	const [replyId, replyIdErr] = $(params.replyId).optional.id().$;
+	if (replyIdErr) return rej('invalid replyId');
 
 	let reply: IPost = null;
 	if (replyId !== undefined) {
@@ -141,14 +141,14 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		}
 
 		// 返信対象が引用でないRepostだったらエラー
-		if (reply.repost_id && !reply.text && !reply.media_ids) {
+		if (reply.repostId && !reply.text && !reply.mediaIds) {
 			return rej('cannot reply to repost');
 		}
 	}
 
-	// Get 'channel_id' parameter
-	const [channelId, channelIdErr] = $(params.channel_id).optional.id().$;
-	if (channelIdErr) return rej('invalid channel_id');
+	// Get 'channelId' parameter
+	const [channelId, channelIdErr] = $(params.channelId).optional.id().$;
+	if (channelIdErr) return rej('invalid channelId');
 
 	let channel: IChannel = null;
 	if (channelId !== undefined) {
@@ -162,12 +162,12 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		}
 
 		// 返信対象の投稿がこのチャンネルじゃなかったらダメ
-		if (reply && !channelId.equals(reply.channel_id)) {
+		if (reply && !channelId.equals(reply.channelId)) {
 			return rej('チャンネル内部からチャンネル外部の投稿に返信することはできません');
 		}
 
 		// Repost対象の投稿がこのチャンネルじゃなかったらダメ
-		if (repost && !channelId.equals(repost.channel_id)) {
+		if (repost && !channelId.equals(repost.channelId)) {
 			return rej('チャンネル内部からチャンネル外部の投稿をRepostすることはできません');
 		}
 
@@ -177,12 +177,12 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		}
 	} else {
 		// 返信対象の投稿がチャンネルへの投稿だったらダメ
-		if (reply && reply.channel_id != null) {
+		if (reply && reply.channelId != null) {
 			return rej('チャンネル外部からチャンネル内部の投稿に返信することはできません');
 		}
 
 		// Repost対象の投稿がチャンネルへの投稿だったらダメ
-		if (repost && repost.channel_id != null) {
+		if (repost && repost.channelId != null) {
 			return rej('チャンネル外部からチャンネル内部の投稿をRepostすることはできません');
 		}
 	}
@@ -206,7 +206,7 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 
 	// テキストが無いかつ添付ファイルが無いかつRepostも無いかつ投票も無かったらエラー
 	if (text === undefined && files === null && repost === null && poll === undefined) {
-		return rej('text, media_ids, repost_id or poll is required');
+		return rej('text, mediaIds, repostId or poll is required');
 	}
 
 	// 直近の投稿と重複してたらエラー
@@ -214,14 +214,14 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 	if (user.latest_post) {
 		if (deepEqual({
 			text: user.latest_post.text,
-			reply: user.latest_post.reply_id ? user.latest_post.reply_id.toString() : null,
-			repost: user.latest_post.repost_id ? user.latest_post.repost_id.toString() : null,
-			media_ids: (user.latest_post.media_ids || []).map(id => id.toString())
+			reply: user.latest_post.replyId ? user.latest_post.replyId.toString() : null,
+			repost: user.latest_post.repostId ? user.latest_post.repostId.toString() : null,
+			mediaIds: (user.latest_post.mediaIds || []).map(id => id.toString())
 		}, {
 			text: text,
 			reply: reply ? reply._id.toString() : null,
 			repost: repost ? repost._id.toString() : null,
-			media_ids: (files || []).map(file => file._id.toString())
+			mediaIds: (files || []).map(file => file._id.toString())
 		})) {
 			return rej('duplicate');
 		}
@@ -246,23 +246,23 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 
 	// 投稿を作成
 	const post = await Post.insert({
-		created_at: new Date(),
-		channel_id: channel ? channel._id : undefined,
+		createdAt: new Date(),
+		channelId: channel ? channel._id : undefined,
 		index: channel ? channel.index + 1 : undefined,
-		media_ids: files ? files.map(file => file._id) : undefined,
-		reply_id: reply ? reply._id : undefined,
-		repost_id: repost ? repost._id : undefined,
+		mediaIds: files ? files.map(file => file._id) : undefined,
+		replyId: reply ? reply._id : undefined,
+		repostId: repost ? repost._id : undefined,
 		poll: poll,
 		text: text,
 		tags: tags,
-		user_id: user._id,
-		app_id: app ? app._id : null,
-		via_mobile: viaMobile,
+		userId: user._id,
+		appId: app ? app._id : null,
+		viaMobile: viaMobile,
 		geo,
 
 		// 以下非正規化データ
-		_reply: reply ? { user_id: reply.user_id } : undefined,
-		_repost: repost ? { user_id: repost.user_id } : undefined,
+		_reply: reply ? { userId: reply.userId } : undefined,
+		_repost: repost ? { userId: repost.userId } : undefined,
 	});
 
 	// Serialize
@@ -293,10 +293,10 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		// Publish event
 		if (!user._id.equals(mentionee)) {
 			const mentioneeMutes = await Mute.find({
-				muter_id: mentionee,
-				deleted_at: { $exists: false }
+				muterId: mentionee,
+				deletedAt: { $exists: false }
 			});
-			const mentioneesMutedUserIds = mentioneeMutes.map(m => m.mutee_id.toString());
+			const mentioneesMutedUserIds = mentioneeMutes.map(m => m.muteeId.toString());
 			if (mentioneesMutedUserIds.indexOf(user._id.toString()) == -1) {
 				event(mentionee, reason, postObj);
 				pushSw(mentionee, reason, postObj);
@@ -312,17 +312,17 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		// Fetch all followers
 		const followers = await Following
 			.find({
-				followee_id: user._id,
+				followeeId: user._id,
 				// 削除されたドキュメントは除く
-				deleted_at: { $exists: false }
+				deletedAt: { $exists: false }
 			}, {
-				follower_id: true,
+				followerId: true,
 				_id: false
 			});
 
 		// Publish event to followers stream
 		followers.forEach(following =>
-			event(following.follower_id, 'post', postObj));
+			event(following.followerId, 'post', postObj));
 	}
 
 	// チャンネルへの投稿
@@ -339,21 +339,21 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 
 		// Get channel watchers
 		const watches = await ChannelWatching.find({
-			channel_id: channel._id,
+			channelId: channel._id,
 			// 削除されたドキュメントは除く
-			deleted_at: { $exists: false }
+			deletedAt: { $exists: false }
 		});
 
 		// チャンネルの視聴者(のタイムライン)に配信
 		watches.forEach(w => {
-			event(w.user_id, 'post', postObj);
+			event(w.userId, 'post', postObj);
 		});
 	}
 
 	// Increment my posts count
 	User.update({ _id: user._id }, {
 		$inc: {
-			posts_count: 1
+			postsCount: 1
 		}
 	});
 
@@ -367,26 +367,26 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		});
 
 		// 自分自身へのリプライでない限りは通知を作成
-		notify(reply.user_id, user._id, 'reply', {
-			post_id: post._id
+		notify(reply.userId, user._id, 'reply', {
+			postId: post._id
 		});
 
 		// Fetch watchers
 		Watching
 			.find({
-				post_id: reply._id,
-				user_id: { $ne: user._id },
+				postId: reply._id,
+				userId: { $ne: user._id },
 				// 削除されたドキュメントは除く
-				deleted_at: { $exists: false }
+				deletedAt: { $exists: false }
 			}, {
 				fields: {
-					user_id: true
+					userId: true
 				}
 			})
 			.then(watchers => {
 				watchers.forEach(watcher => {
-					notify(watcher.user_id, user._id, 'reply', {
-						post_id: post._id
+					notify(watcher.userId, user._id, 'reply', {
+						postId: post._id
 					});
 				});
 			});
@@ -397,33 +397,33 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		}
 
 		// Add mention
-		addMention(reply.user_id, 'reply');
+		addMention(reply.userId, 'reply');
 	}
 
 	// If it is repost
 	if (repost) {
 		// Notify
 		const type = text ? 'quote' : 'repost';
-		notify(repost.user_id, user._id, type, {
-			post_id: post._id
+		notify(repost.userId, user._id, type, {
+			postId: post._id
 		});
 
 		// Fetch watchers
 		Watching
 			.find({
-				post_id: repost._id,
-				user_id: { $ne: user._id },
+				postId: repost._id,
+				userId: { $ne: user._id },
 				// 削除されたドキュメントは除く
-				deleted_at: { $exists: false }
+				deletedAt: { $exists: false }
 			}, {
 				fields: {
-					user_id: true
+					userId: true
 				}
 			})
 			.then(watchers => {
 				watchers.forEach(watcher => {
-					notify(watcher.user_id, user._id, type, {
-						post_id: post._id
+					notify(watcher.userId, user._id, type, {
+						postId: post._id
 					});
 				});
 			});
@@ -436,18 +436,18 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 		// If it is quote repost
 		if (text) {
 			// Add mention
-			addMention(repost.user_id, 'quote');
+			addMention(repost.userId, 'quote');
 		} else {
 			// Publish event
-			if (!user._id.equals(repost.user_id)) {
-				event(repost.user_id, 'repost', postObj);
+			if (!user._id.equals(repost.userId)) {
+				event(repost.userId, 'repost', postObj);
 			}
 		}
 
 		// 今までで同じ投稿をRepostしているか
 		const existRepost = await Post.findOne({
-			user_id: user._id,
-			repost_id: repost._id,
+			userId: user._id,
+			repostId: repost._id,
 			_id: {
 				$ne: post._id
 			}
@@ -494,15 +494,15 @@ module.exports = (params, user: IUser, app) => new Promise(async (res, rej) => {
 			if (mentionee == null) return;
 
 			// 既に言及されたユーザーに対する返信や引用repostの場合も無視
-			if (reply && reply.user_id.equals(mentionee._id)) return;
-			if (repost && repost.user_id.equals(mentionee._id)) return;
+			if (reply && reply.userId.equals(mentionee._id)) return;
+			if (repost && repost.userId.equals(mentionee._id)) return;
 
 			// Add mention
 			addMention(mentionee._id, 'mention');
 
 			// Create notification
 			notify(mentionee._id, user._id, 'mention', {
-				post_id: post._id
+				postId: post._id
 			});
 
 			return;
diff --git a/src/api/endpoints/posts/favorites/create.ts b/src/api/endpoints/posts/favorites/create.ts
index f9dee271b5..6100e10b23 100644
--- a/src/api/endpoints/posts/favorites/create.ts
+++ b/src/api/endpoints/posts/favorites/create.ts
@@ -13,9 +13,9 @@ import Post from '../../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get favoritee
 	const post = await Post.findOne({
@@ -28,8 +28,8 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// if already favorited
 	const exist = await Favorite.findOne({
-		post_id: post._id,
-		user_id: user._id
+		postId: post._id,
+		userId: user._id
 	});
 
 	if (exist !== null) {
@@ -38,9 +38,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Create favorite
 	await Favorite.insert({
-		created_at: new Date(),
-		post_id: post._id,
-		user_id: user._id
+		createdAt: new Date(),
+		postId: post._id,
+		userId: user._id
 	});
 
 	// Send response
diff --git a/src/api/endpoints/posts/favorites/delete.ts b/src/api/endpoints/posts/favorites/delete.ts
index c4fe7d3234..b1b4fcebc4 100644
--- a/src/api/endpoints/posts/favorites/delete.ts
+++ b/src/api/endpoints/posts/favorites/delete.ts
@@ -13,9 +13,9 @@ import Post from '../../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get favoritee
 	const post = await Post.findOne({
@@ -28,8 +28,8 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// if already favorited
 	const exist = await Favorite.findOne({
-		post_id: post._id,
-		user_id: user._id
+		postId: post._id,
+		userId: user._id
 	});
 
 	if (exist === null) {
diff --git a/src/api/endpoints/posts/mentions.ts b/src/api/endpoints/posts/mentions.ts
index 7127db0ad1..da90583bbd 100644
--- a/src/api/endpoints/posts/mentions.ts
+++ b/src/api/endpoints/posts/mentions.ts
@@ -48,7 +48,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	if (following) {
 		const followingIds = await getFriends(user._id);
 
-		query.user_id = {
+		query.userId = {
 			$in: followingIds
 		};
 	}
diff --git a/src/api/endpoints/posts/polls/recommendation.ts b/src/api/endpoints/posts/polls/recommendation.ts
index 4a3fa3f55e..19ef0975fa 100644
--- a/src/api/endpoints/posts/polls/recommendation.ts
+++ b/src/api/endpoints/posts/polls/recommendation.ts
@@ -23,22 +23,22 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Get votes
 	const votes = await Vote.find({
-		user_id: user._id
+		userId: user._id
 	}, {
 		fields: {
 			_id: false,
-			post_id: true
+			postId: true
 		}
 	});
 
-	const nin = votes && votes.length != 0 ? votes.map(v => v.post_id) : [];
+	const nin = votes && votes.length != 0 ? votes.map(v => v.postId) : [];
 
 	const posts = await Post
 		.find({
 			_id: {
 				$nin: nin
 			},
-			user_id: {
+			userId: {
 				$ne: user._id
 			},
 			poll: {
diff --git a/src/api/endpoints/posts/polls/vote.ts b/src/api/endpoints/posts/polls/vote.ts
index 16ce76a6fa..e87474ae6e 100644
--- a/src/api/endpoints/posts/polls/vote.ts
+++ b/src/api/endpoints/posts/polls/vote.ts
@@ -17,9 +17,9 @@ import { publishPostStream } from '../../../event';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get votee
 	const post = await Post.findOne({
@@ -43,8 +43,8 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// if already voted
 	const exist = await Vote.findOne({
-		post_id: post._id,
-		user_id: user._id
+		postId: post._id,
+		userId: user._id
 	});
 
 	if (exist !== null) {
@@ -53,9 +53,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Create vote
 	await Vote.insert({
-		created_at: new Date(),
-		post_id: post._id,
-		user_id: user._id,
+		createdAt: new Date(),
+		postId: post._id,
+		userId: user._id,
 		choice: choice
 	});
 
@@ -73,27 +73,27 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	publishPostStream(post._id, 'poll_voted');
 
 	// Notify
-	notify(post.user_id, user._id, 'poll_vote', {
-		post_id: post._id,
+	notify(post.userId, user._id, 'poll_vote', {
+		postId: post._id,
 		choice: choice
 	});
 
 	// Fetch watchers
 	Watching
 		.find({
-			post_id: post._id,
-			user_id: { $ne: user._id },
+			postId: post._id,
+			userId: { $ne: user._id },
 			// 削除されたドキュメントは除く
-			deleted_at: { $exists: false }
+			deletedAt: { $exists: false }
 		}, {
 			fields: {
-				user_id: true
+				userId: true
 			}
 		})
 		.then(watchers => {
 			watchers.forEach(watcher => {
-				notify(watcher.user_id, user._id, 'poll_vote', {
-					post_id: post._id,
+				notify(watcher.userId, user._id, 'poll_vote', {
+					postId: post._id,
 					choice: choice
 				});
 			});
diff --git a/src/api/endpoints/posts/reactions.ts b/src/api/endpoints/posts/reactions.ts
index feb140ab41..f753ba7c29 100644
--- a/src/api/endpoints/posts/reactions.ts
+++ b/src/api/endpoints/posts/reactions.ts
@@ -13,9 +13,9 @@ import Reaction, { pack } from '../../models/post-reaction';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get 'limit' parameter
 	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
@@ -41,8 +41,8 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	// Issue query
 	const reactions = await Reaction
 		.find({
-			post_id: post._id,
-			deleted_at: { $exists: false }
+			postId: post._id,
+			deletedAt: { $exists: false }
 		}, {
 			limit: limit,
 			skip: offset,
diff --git a/src/api/endpoints/posts/reactions/create.ts b/src/api/endpoints/posts/reactions/create.ts
index f77afed40c..7031d28e56 100644
--- a/src/api/endpoints/posts/reactions/create.ts
+++ b/src/api/endpoints/posts/reactions/create.ts
@@ -18,9 +18,9 @@ import { publishPostStream, pushSw } from '../../../event';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get 'reaction' parameter
 	const [reaction, reactionErr] = $(params.reaction).string().or([
@@ -46,15 +46,15 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	}
 
 	// Myself
-	if (post.user_id.equals(user._id)) {
+	if (post.userId.equals(user._id)) {
 		return rej('cannot react to my post');
 	}
 
 	// if already reacted
 	const exist = await Reaction.findOne({
-		post_id: post._id,
-		user_id: user._id,
-		deleted_at: { $exists: false }
+		postId: post._id,
+		userId: user._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist !== null) {
@@ -63,9 +63,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Create reaction
 	await Reaction.insert({
-		created_at: new Date(),
-		post_id: post._id,
-		user_id: user._id,
+		createdAt: new Date(),
+		postId: post._id,
+		userId: user._id,
 		reaction: reaction
 	});
 
@@ -83,33 +83,33 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	publishPostStream(post._id, 'reacted');
 
 	// Notify
-	notify(post.user_id, user._id, 'reaction', {
-		post_id: post._id,
+	notify(post.userId, user._id, 'reaction', {
+		postId: post._id,
 		reaction: reaction
 	});
 
-	pushSw(post.user_id, 'reaction', {
-		user: await packUser(user, post.user_id),
-		post: await packPost(post, post.user_id),
+	pushSw(post.userId, 'reaction', {
+		user: await packUser(user, post.userId),
+		post: await packPost(post, post.userId),
 		reaction: reaction
 	});
 
 	// Fetch watchers
 	Watching
 		.find({
-			post_id: post._id,
-			user_id: { $ne: user._id },
+			postId: post._id,
+			userId: { $ne: user._id },
 			// 削除されたドキュメントは除く
-			deleted_at: { $exists: false }
+			deletedAt: { $exists: false }
 		}, {
 			fields: {
-				user_id: true
+				userId: true
 			}
 		})
 		.then(watchers => {
 			watchers.forEach(watcher => {
-				notify(watcher.user_id, user._id, 'reaction', {
-					post_id: post._id,
+				notify(watcher.userId, user._id, 'reaction', {
+					postId: post._id,
 					reaction: reaction
 				});
 			});
diff --git a/src/api/endpoints/posts/reactions/delete.ts b/src/api/endpoints/posts/reactions/delete.ts
index 922c57ab18..18fdabcdc2 100644
--- a/src/api/endpoints/posts/reactions/delete.ts
+++ b/src/api/endpoints/posts/reactions/delete.ts
@@ -14,9 +14,9 @@ import Post from '../../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Fetch unreactee
 	const post = await Post.findOne({
@@ -29,9 +29,9 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// if already unreacted
 	const exist = await Reaction.findOne({
-		post_id: post._id,
-		user_id: user._id,
-		deleted_at: { $exists: false }
+		postId: post._id,
+		userId: user._id,
+		deletedAt: { $exists: false }
 	});
 
 	if (exist === null) {
@@ -43,7 +43,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		_id: exist._id
 	}, {
 			$set: {
-				deleted_at: new Date()
+				deletedAt: new Date()
 			}
 		});
 
diff --git a/src/api/endpoints/posts/replies.ts b/src/api/endpoints/posts/replies.ts
index 613c4fa24c..db021505fc 100644
--- a/src/api/endpoints/posts/replies.ts
+++ b/src/api/endpoints/posts/replies.ts
@@ -12,9 +12,9 @@ import Post, { pack } from '../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get 'limit' parameter
 	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
@@ -39,7 +39,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Issue query
 	const replies = await Post
-		.find({ reply_id: post._id }, {
+		.find({ replyId: post._id }, {
 			limit: limit,
 			skip: offset,
 			sort: {
diff --git a/src/api/endpoints/posts/reposts.ts b/src/api/endpoints/posts/reposts.ts
index 89ab0e3d55..c1645117f0 100644
--- a/src/api/endpoints/posts/reposts.ts
+++ b/src/api/endpoints/posts/reposts.ts
@@ -12,9 +12,9 @@ import Post, { pack } from '../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get 'limit' parameter
 	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
@@ -47,7 +47,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		_id: -1
 	};
 	const query = {
-		repost_id: post._id
+		repostId: post._id
 	} as any;
 	if (sinceId) {
 		sort._id = 1;
diff --git a/src/api/endpoints/posts/search.ts b/src/api/endpoints/posts/search.ts
index a36d1178a5..e7906c95c8 100644
--- a/src/api/endpoints/posts/search.ts
+++ b/src/api/endpoints/posts/search.ts
@@ -21,13 +21,13 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	const [text, textError] = $(params.text).optional.string().$;
 	if (textError) return rej('invalid text param');
 
-	// Get 'include_user_ids' parameter
-	const [includeUserIds = [], includeUserIdsErr] = $(params.include_user_ids).optional.array('id').$;
-	if (includeUserIdsErr) return rej('invalid include_user_ids param');
+	// Get 'include_userIds' parameter
+	const [includeUserIds = [], includeUserIdsErr] = $(params.include_userIds).optional.array('id').$;
+	if (includeUserIdsErr) return rej('invalid include_userIds param');
 
-	// Get 'exclude_user_ids' parameter
-	const [excludeUserIds = [], excludeUserIdsErr] = $(params.exclude_user_ids).optional.array('id').$;
-	if (excludeUserIdsErr) return rej('invalid exclude_user_ids param');
+	// Get 'exclude_userIds' parameter
+	const [excludeUserIds = [], excludeUserIdsErr] = $(params.exclude_userIds).optional.array('id').$;
+	if (excludeUserIdsErr) return rej('invalid exclude_userIds param');
 
 	// Get 'include_user_usernames' parameter
 	const [includeUserUsernames = [], includeUserUsernamesErr] = $(params.include_user_usernames).optional.array('string').$;
@@ -81,7 +81,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	if (includeUserUsernames != null) {
 		const ids = (await Promise.all(includeUserUsernames.map(async (username) => {
 			const _user = await User.findOne({
-				username_lower: username.toLowerCase()
+				usernameLower: username.toLowerCase()
 			});
 			return _user ? _user._id : null;
 		}))).filter(id => id != null);
@@ -92,7 +92,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	if (excludeUserUsernames != null) {
 		const ids = (await Promise.all(excludeUserUsernames.map(async (username) => {
 			const _user = await User.findOne({
-				username_lower: username.toLowerCase()
+				usernameLower: username.toLowerCase()
 			});
 			return _user ? _user._id : null;
 		}))).filter(id => id != null);
@@ -143,13 +143,13 @@ async function search(
 
 	if (includeUserIds && includeUserIds.length != 0) {
 		push({
-			user_id: {
+			userId: {
 				$in: includeUserIds
 			}
 		});
 	} else if (excludeUserIds && excludeUserIds.length != 0) {
 		push({
-			user_id: {
+			userId: {
 				$nin: excludeUserIds
 			}
 		});
@@ -158,7 +158,7 @@ async function search(
 	if (following != null && me != null) {
 		const ids = await getFriends(me._id, false);
 		push({
-			user_id: following ? {
+			userId: following ? {
 				$in: ids
 			} : {
 				$nin: ids.concat(me._id)
@@ -168,45 +168,45 @@ async function search(
 
 	if (me != null) {
 		const mutes = await Mute.find({
-			muter_id: me._id,
-			deleted_at: { $exists: false }
+			muterId: me._id,
+			deletedAt: { $exists: false }
 		});
-		const mutedUserIds = mutes.map(m => m.mutee_id);
+		const mutedUserIds = mutes.map(m => m.muteeId);
 
 		switch (mute) {
 			case 'mute_all':
 				push({
-					user_id: {
+					userId: {
 						$nin: mutedUserIds
 					},
-					'_reply.user_id': {
+					'_reply.userId': {
 						$nin: mutedUserIds
 					},
-					'_repost.user_id': {
+					'_repost.userId': {
 						$nin: mutedUserIds
 					}
 				});
 				break;
 			case 'mute_related':
 				push({
-					'_reply.user_id': {
+					'_reply.userId': {
 						$nin: mutedUserIds
 					},
-					'_repost.user_id': {
+					'_repost.userId': {
 						$nin: mutedUserIds
 					}
 				});
 				break;
 			case 'mute_direct':
 				push({
-					user_id: {
+					userId: {
 						$nin: mutedUserIds
 					}
 				});
 				break;
 			case 'direct_only':
 				push({
-					user_id: {
+					userId: {
 						$in: mutedUserIds
 					}
 				});
@@ -214,11 +214,11 @@ async function search(
 			case 'related_only':
 				push({
 					$or: [{
-						'_reply.user_id': {
+						'_reply.userId': {
 							$in: mutedUserIds
 						}
 					}, {
-						'_repost.user_id': {
+						'_repost.userId': {
 							$in: mutedUserIds
 						}
 					}]
@@ -227,15 +227,15 @@ async function search(
 			case 'all_only':
 				push({
 					$or: [{
-						user_id: {
+						userId: {
 							$in: mutedUserIds
 						}
 					}, {
-						'_reply.user_id': {
+						'_reply.userId': {
 							$in: mutedUserIds
 						}
 					}, {
-						'_repost.user_id': {
+						'_repost.userId': {
 							$in: mutedUserIds
 						}
 					}]
@@ -247,7 +247,7 @@ async function search(
 	if (reply != null) {
 		if (reply) {
 			push({
-				reply_id: {
+				replyId: {
 					$exists: true,
 					$ne: null
 				}
@@ -255,11 +255,11 @@ async function search(
 		} else {
 			push({
 				$or: [{
-					reply_id: {
+					replyId: {
 						$exists: false
 					}
 				}, {
-					reply_id: null
+					replyId: null
 				}]
 			});
 		}
@@ -268,7 +268,7 @@ async function search(
 	if (repost != null) {
 		if (repost) {
 			push({
-				repost_id: {
+				repostId: {
 					$exists: true,
 					$ne: null
 				}
@@ -276,11 +276,11 @@ async function search(
 		} else {
 			push({
 				$or: [{
-					repost_id: {
+					repostId: {
 						$exists: false
 					}
 				}, {
-					repost_id: null
+					repostId: null
 				}]
 			});
 		}
@@ -289,7 +289,7 @@ async function search(
 	if (media != null) {
 		if (media) {
 			push({
-				media_ids: {
+				mediaIds: {
 					$exists: true,
 					$ne: null
 				}
@@ -297,11 +297,11 @@ async function search(
 		} else {
 			push({
 				$or: [{
-					media_ids: {
+					mediaIds: {
 						$exists: false
 					}
 				}, {
-					media_ids: null
+					mediaIds: null
 				}]
 			});
 		}
@@ -330,7 +330,7 @@ async function search(
 
 	if (sinceDate) {
 		push({
-			created_at: {
+			createdAt: {
 				$gt: new Date(sinceDate)
 			}
 		});
@@ -338,7 +338,7 @@ async function search(
 
 	if (untilDate) {
 		push({
-			created_at: {
+			createdAt: {
 				$lt: new Date(untilDate)
 			}
 		});
diff --git a/src/api/endpoints/posts/show.ts b/src/api/endpoints/posts/show.ts
index 3839490597..bb4bcdb790 100644
--- a/src/api/endpoints/posts/show.ts
+++ b/src/api/endpoints/posts/show.ts
@@ -12,9 +12,9 @@ import Post, { pack } from '../../models/post';
  * @return {Promise<any>}
  */
 module.exports = (params, user) => new Promise(async (res, rej) => {
-	// Get 'post_id' parameter
-	const [postId, postIdErr] = $(params.post_id).id().$;
-	if (postIdErr) return rej('invalid post_id param');
+	// Get 'postId' parameter
+	const [postId, postIdErr] = $(params.postId).id().$;
+	if (postIdErr) return rej('invalid postId param');
 
 	// Get post
 	const post = await Post.findOne({
diff --git a/src/api/endpoints/posts/timeline.ts b/src/api/endpoints/posts/timeline.ts
index c41cfdb8bd..c7cb8032e3 100644
--- a/src/api/endpoints/posts/timeline.ts
+++ b/src/api/endpoints/posts/timeline.ts
@@ -49,17 +49,17 @@ module.exports = async (params, user, app) => {
 
 		// Watchしているチャンネルを取得
 		watchingChannelIds: ChannelWatching.find({
-			user_id: user._id,
+			userId: user._id,
 			// 削除されたドキュメントは除く
-			deleted_at: { $exists: false }
-		}).then(watches => watches.map(w => w.channel_id)),
+			deletedAt: { $exists: false }
+		}).then(watches => watches.map(w => w.channelId)),
 
 		// ミュートしているユーザーを取得
 		mutedUserIds: Mute.find({
-			muter_id: user._id,
+			muterId: user._id,
 			// 削除されたドキュメントは除く
-			deleted_at: { $exists: false }
-		}).then(ms => ms.map(m => m.mutee_id))
+			deletedAt: { $exists: false }
+		}).then(ms => ms.map(m => m.muteeId))
 	});
 
 	//#region Construct query
@@ -70,31 +70,31 @@ module.exports = async (params, user, app) => {
 	const query = {
 		$or: [{
 			// フォローしている人のタイムラインへの投稿
-			user_id: {
+			userId: {
 				$in: followingIds
 			},
 			// 「タイムラインへの」投稿に限定するためにチャンネルが指定されていないもののみに限る
 			$or: [{
-				channel_id: {
+				channelId: {
 					$exists: false
 				}
 			}, {
-				channel_id: null
+				channelId: null
 			}]
 		}, {
 			// Watchしているチャンネルへの投稿
-			channel_id: {
+			channelId: {
 				$in: watchingChannelIds
 			}
 		}],
 		// mute
-		user_id: {
+		userId: {
 			$nin: mutedUserIds
 		},
-		'_reply.user_id': {
+		'_reply.userId': {
 			$nin: mutedUserIds
 		},
-		'_repost.user_id': {
+		'_repost.userId': {
 			$nin: mutedUserIds
 		},
 	} as any;
@@ -110,11 +110,11 @@ module.exports = async (params, user, app) => {
 		};
 	} else if (sinceDate) {
 		sort._id = 1;
-		query.created_at = {
+		query.createdAt = {
 			$gt: new Date(sinceDate)
 		};
 	} else if (untilDate) {
-		query.created_at = {
+		query.createdAt = {
 			$lt: new Date(untilDate)
 		};
 	}
diff --git a/src/api/endpoints/posts/trend.ts b/src/api/endpoints/posts/trend.ts
index caded92bf5..3f92f06167 100644
--- a/src/api/endpoints/posts/trend.ts
+++ b/src/api/endpoints/posts/trend.ts
@@ -38,7 +38,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	if (pollErr) return rej('invalid poll param');
 
 	const query = {
-		created_at: {
+		createdAt: {
 			$gte: new Date(Date.now() - ms('1days'))
 		},
 		repost_count: {
@@ -47,15 +47,15 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	} as any;
 
 	if (reply != undefined) {
-		query.reply_id = reply ? { $exists: true, $ne: null } : null;
+		query.replyId = reply ? { $exists: true, $ne: null } : null;
 	}
 
 	if (repost != undefined) {
-		query.repost_id = repost ? { $exists: true, $ne: null } : null;
+		query.repostId = repost ? { $exists: true, $ne: null } : null;
 	}
 
 	if (media != undefined) {
-		query.media_ids = media ? { $exists: true, $ne: null } : null;
+		query.mediaIds = media ? { $exists: true, $ne: null } : null;
 	}
 
 	if (poll != undefined) {
diff --git a/src/api/endpoints/stats.ts b/src/api/endpoints/stats.ts
index a6084cd17a..eee6f48706 100644
--- a/src/api/endpoints/stats.ts
+++ b/src/api/endpoints/stats.ts
@@ -15,7 +15,7 @@ import User from '../models/user';
  *         schema:
  *           type: object
  *           properties:
- *             posts_count:
+ *             postsCount:
  *               description: count of all posts of misskey
  *               type: number
  *             users_count:
@@ -42,7 +42,7 @@ module.exports = params => new Promise(async (res, rej) => {
 		.count();
 
 	res({
-		posts_count: postsCount,
+		postsCount: postsCount,
 		users_count: usersCount
 	});
 });
diff --git a/src/api/endpoints/sw/register.ts b/src/api/endpoints/sw/register.ts
index 99406138db..1542e1dbeb 100644
--- a/src/api/endpoints/sw/register.ts
+++ b/src/api/endpoints/sw/register.ts
@@ -28,11 +28,11 @@ module.exports = async (params, user, _, isSecure) => new Promise(async (res, re
 
 	// if already subscribed
 	const exist = await Subscription.findOne({
-		user_id: user._id,
+		userId: user._id,
 		endpoint: endpoint,
 		auth: auth,
 		publickey: publickey,
-		deleted_at: { $exists: false }
+		deletedAt: { $exists: false }
 	});
 
 	if (exist !== null) {
@@ -40,7 +40,7 @@ module.exports = async (params, user, _, isSecure) => new Promise(async (res, re
 	}
 
 	await Subscription.insert({
-		user_id: user._id,
+		userId: user._id,
 		endpoint: endpoint,
 		auth: auth,
 		publickey: publickey
diff --git a/src/api/endpoints/username/available.ts b/src/api/endpoints/username/available.ts
index aac7fadf5a..f23cdbd85a 100644
--- a/src/api/endpoints/username/available.ts
+++ b/src/api/endpoints/username/available.ts
@@ -20,7 +20,7 @@ module.exports = async (params) => new Promise(async (res, rej) => {
 	const exist = await User
 		.count({
 			host: null,
-			username_lower: username.toLowerCase()
+			usernameLower: username.toLowerCase()
 		}, {
 			limit: 1
 		});
diff --git a/src/api/endpoints/users.ts b/src/api/endpoints/users.ts
index 4acc13c281..393c3479c5 100644
--- a/src/api/endpoints/users.ts
+++ b/src/api/endpoints/users.ts
@@ -29,11 +29,11 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	if (sort) {
 		if (sort == '+follower') {
 			_sort = {
-				followers_count: -1
+				followersCount: -1
 			};
 		} else if (sort == '-follower') {
 			_sort = {
-				followers_count: 1
+				followersCount: 1
 			};
 		}
 	} else {
diff --git a/src/api/endpoints/users/followers.ts b/src/api/endpoints/users/followers.ts
index b0fb83c683..fc09cfa2c6 100644
--- a/src/api/endpoints/users/followers.ts
+++ b/src/api/endpoints/users/followers.ts
@@ -15,9 +15,9 @@ import getFriends from '../../common/get-friends';
  * @return {Promise<any>}
  */
 module.exports = (params, me) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Get 'iknow' parameter
 	const [iknow = false, iknowErr] = $(params.iknow).optional.boolean().$;
@@ -46,8 +46,8 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Construct query
 	const query = {
-		followee_id: user._id,
-		deleted_at: { $exists: false }
+		followeeId: user._id,
+		deletedAt: { $exists: false }
 	} as any;
 
 	// ログインしていてかつ iknow フラグがあるとき
@@ -55,7 +55,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 		// Get my friends
 		const myFriends = await getFriends(me._id);
 
-		query.follower_id = {
+		query.followerId = {
 			$in: myFriends
 		};
 	}
@@ -82,7 +82,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Serialize
 	const users = await Promise.all(following.map(async f =>
-		await pack(f.follower_id, me, { detail: true })));
+		await pack(f.followerId, me, { detail: true })));
 
 	// Response
 	res({
diff --git a/src/api/endpoints/users/following.ts b/src/api/endpoints/users/following.ts
index 8e88431e92..3387dab366 100644
--- a/src/api/endpoints/users/following.ts
+++ b/src/api/endpoints/users/following.ts
@@ -15,9 +15,9 @@ import getFriends from '../../common/get-friends';
  * @return {Promise<any>}
  */
 module.exports = (params, me) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Get 'iknow' parameter
 	const [iknow = false, iknowErr] = $(params.iknow).optional.boolean().$;
@@ -46,8 +46,8 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Construct query
 	const query = {
-		follower_id: user._id,
-		deleted_at: { $exists: false }
+		followerId: user._id,
+		deletedAt: { $exists: false }
 	} as any;
 
 	// ログインしていてかつ iknow フラグがあるとき
@@ -55,7 +55,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 		// Get my friends
 		const myFriends = await getFriends(me._id);
 
-		query.followee_id = {
+		query.followeeId = {
 			$in: myFriends
 		};
 	}
@@ -82,7 +82,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Serialize
 	const users = await Promise.all(following.map(async f =>
-		await pack(f.followee_id, me, { detail: true })));
+		await pack(f.followeeId, me, { detail: true })));
 
 	// Response
 	res({
diff --git a/src/api/endpoints/users/get_frequently_replied_users.ts b/src/api/endpoints/users/get_frequently_replied_users.ts
index 87f4f77a5b..991c5555b6 100644
--- a/src/api/endpoints/users/get_frequently_replied_users.ts
+++ b/src/api/endpoints/users/get_frequently_replied_users.ts
@@ -6,9 +6,9 @@ import Post from '../../models/post';
 import User, { pack } from '../../models/user';
 
 module.exports = (params, me) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Get 'limit' parameter
 	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
@@ -29,8 +29,8 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Fetch recent posts
 	const recentPosts = await Post.find({
-		user_id: user._id,
-		reply_id: {
+		userId: user._id,
+		replyId: {
 			$exists: true,
 			$ne: null
 		}
@@ -41,7 +41,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 		limit: 1000,
 		fields: {
 			_id: false,
-			reply_id: true
+			replyId: true
 		}
 	});
 
@@ -52,15 +52,15 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	const replyTargetPosts = await Post.find({
 		_id: {
-			$in: recentPosts.map(p => p.reply_id)
+			$in: recentPosts.map(p => p.replyId)
 		},
-		user_id: {
+		userId: {
 			$ne: user._id
 		}
 	}, {
 		fields: {
 			_id: false,
-			user_id: true
+			userId: true
 		}
 	});
 
@@ -68,7 +68,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	// Extract replies from recent posts
 	replyTargetPosts.forEach(post => {
-		const userId = post.user_id.toString();
+		const userId = post.userId.toString();
 		if (repliedUsers[userId]) {
 			repliedUsers[userId]++;
 		} else {
diff --git a/src/api/endpoints/users/posts.ts b/src/api/endpoints/users/posts.ts
index 3c84bf0d80..f08be91c4d 100644
--- a/src/api/endpoints/users/posts.ts
+++ b/src/api/endpoints/users/posts.ts
@@ -14,16 +14,16 @@ import User from '../../models/user';
  * @return {Promise<any>}
  */
 module.exports = (params, me) => new Promise(async (res, rej) => {
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).optional.id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).optional.id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Get 'username' parameter
 	const [username, usernameErr] = $(params.username).optional.string().$;
 	if (usernameErr) return rej('invalid username param');
 
 	if (userId === undefined && username === undefined) {
-		return rej('user_id or pair of username and host is required');
+		return rej('userId or pair of username and host is required');
 	}
 
 	// Get 'host' parameter
@@ -31,7 +31,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	if (hostErr) return rej('invalid host param');
 
 	if (userId === undefined && host === undefined) {
-		return rej('user_id or pair of username and host is required');
+		return rej('userId or pair of username and host is required');
 	}
 
 	// Get 'include_replies' parameter
@@ -69,7 +69,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	const q = userId !== undefined
 		? { _id: userId }
-		: { username_lower: username.toLowerCase(), host_lower: getHostLower(host) } ;
+		: { usernameLower: username.toLowerCase(), hostLower: getHostLower(host) } ;
 
 	// Lookup user
 	const user = await User.findOne(q, {
@@ -88,7 +88,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	};
 
 	const query = {
-		user_id: user._id
+		userId: user._id
 	} as any;
 
 	if (sinceId) {
@@ -102,21 +102,21 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 		};
 	} else if (sinceDate) {
 		sort._id = 1;
-		query.created_at = {
+		query.createdAt = {
 			$gt: new Date(sinceDate)
 		};
 	} else if (untilDate) {
-		query.created_at = {
+		query.createdAt = {
 			$lt: new Date(untilDate)
 		};
 	}
 
 	if (!includeReplies) {
-		query.reply_id = null;
+		query.replyId = null;
 	}
 
 	if (withMedia) {
-		query.media_ids = {
+		query.mediaIds = {
 			$exists: true,
 			$ne: null
 		};
diff --git a/src/api/endpoints/users/recommendation.ts b/src/api/endpoints/users/recommendation.ts
index 45d90f422b..c5297cdc50 100644
--- a/src/api/endpoints/users/recommendation.ts
+++ b/src/api/endpoints/users/recommendation.ts
@@ -32,7 +32,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 			},
 			$or: [
 				{
-					'account.last_used_at': {
+					'account.lastUsedAt': {
 						$gte: new Date(Date.now() - ms('7days'))
 					}
 				}, {
@@ -43,7 +43,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 			limit: limit,
 			skip: offset,
 			sort: {
-				followers_count: -1
+				followersCount: -1
 			}
 		});
 
diff --git a/src/api/endpoints/users/search.ts b/src/api/endpoints/users/search.ts
index 39e2ff9890..1cc25e61b8 100644
--- a/src/api/endpoints/users/search.ts
+++ b/src/api/endpoints/users/search.ts
@@ -41,7 +41,7 @@ async function byNative(res, rej, me, query, offset, max) {
 	const users = await User
 		.find({
 			$or: [{
-				username_lower: new RegExp(escapedQuery.replace('@', '').toLowerCase())
+				usernameLower: new RegExp(escapedQuery.replace('@', '').toLowerCase())
 			}, {
 				name: new RegExp(escapedQuery)
 			}]
diff --git a/src/api/endpoints/users/search_by_username.ts b/src/api/endpoints/users/search_by_username.ts
index 9c5e1905aa..24e9c98e78 100644
--- a/src/api/endpoints/users/search_by_username.ts
+++ b/src/api/endpoints/users/search_by_username.ts
@@ -26,7 +26,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 	const users = await User
 		.find({
-			username_lower: new RegExp(query.toLowerCase())
+			usernameLower: new RegExp(query.toLowerCase())
 		}, {
 			limit: limit,
 			skip: offset
diff --git a/src/api/endpoints/users/show.ts b/src/api/endpoints/users/show.ts
index 78df23f339..16411dddc6 100644
--- a/src/api/endpoints/users/show.ts
+++ b/src/api/endpoints/users/show.ts
@@ -56,9 +56,9 @@ function webFingerAndVerify(query, verifier) {
 module.exports = (params, me) => new Promise(async (res, rej) => {
 	let user;
 
-	// Get 'user_id' parameter
-	const [userId, userIdErr] = $(params.user_id).optional.id().$;
-	if (userIdErr) return rej('invalid user_id param');
+	// Get 'userId' parameter
+	const [userId, userIdErr] = $(params.userId).optional.id().$;
+	if (userIdErr) return rej('invalid userId param');
 
 	// Get 'username' parameter
 	const [username, usernameErr] = $(params.username).optional.string().$;
@@ -69,25 +69,25 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 	if (hostErr) return rej('invalid username param');
 
 	if (userId === undefined && typeof username !== 'string') {
-		return rej('user_id or pair of username and host is required');
+		return rej('userId or pair of username and host is required');
 	}
 
 	// Lookup user
 	if (typeof host === 'string') {
-		const username_lower = username.toLowerCase();
-		const host_lower_ascii = toASCII(host).toLowerCase();
-		const host_lower = toUnicode(host_lower_ascii);
+		const usernameLower = username.toLowerCase();
+		const hostLower_ascii = toASCII(host).toLowerCase();
+		const hostLower = toUnicode(hostLower_ascii);
 
-		user = await findUser({ username_lower, host_lower });
+		user = await findUser({ usernameLower, hostLower });
 
 		if (user === null) {
-			const acct_lower = `${username_lower}@${host_lower_ascii}`;
+			const acct_lower = `${usernameLower}@${hostLower_ascii}`;
 			let activityStreams;
 			let finger;
-			let followers_count;
-			let following_count;
+			let followersCount;
+			let followingCount;
 			let likes_count;
-			let posts_count;
+			let postsCount;
 
 			if (!validateUsername(username)) {
 				return rej('username validation failed');
@@ -122,7 +122,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 					activityStreams['@context'] === 'https://www.w3.org/ns/activitystreams') &&
 				activityStreams.type === 'Person' &&
 				typeof activityStreams.preferredUsername === 'string' &&
-				activityStreams.preferredUsername.toLowerCase() === username_lower &&
+				activityStreams.preferredUsername.toLowerCase() === usernameLower &&
 				isValidName(activityStreams.name) &&
 				isValidDescription(activityStreams.summary)
 			)) {
@@ -130,7 +130,7 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 			}
 
 			try {
-				[followers_count, following_count, likes_count, posts_count] = await Promise.all([
+				[followersCount, followingCount, likes_count, postsCount] = await Promise.all([
 					getCollectionCount(activityStreams.followers),
 					getCollectionCount(activityStreams.following),
 					getCollectionCount(activityStreams.liked),
@@ -145,21 +145,21 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 			// Create user
 			user = await User.insert({
-				avatar_id: null,
-				banner_id: null,
-				created_at: new Date(),
+				avatarId: null,
+				bannerId: null,
+				createdAt: new Date(),
 				description: summaryDOM.textContent,
-				followers_count,
-				following_count,
+				followersCount,
+				followingCount,
 				name: activityStreams.name,
-				posts_count,
+				postsCount,
 				likes_count,
 				liked_count: 0,
-				drive_capacity: 1073741824, // 1GB
+				driveCapacity: 1073741824, // 1GB
 				username: username,
-				username_lower,
+				usernameLower,
 				host: toUnicode(finger.subject.replace(/^.*?@/, '')),
-				host_lower,
+				hostLower,
 				account: {
 					uri: activityStreams.id,
 				},
@@ -182,18 +182,18 @@ module.exports = (params, me) => new Promise(async (res, rej) => {
 
 			User.update({ _id: user._id }, {
 				$set: {
-					avatar_id: icon._id,
-					banner_id: image._id,
+					avatarId: icon._id,
+					bannerId: image._id,
 				},
 			});
 
-			user.avatar_id = icon._id;
-			user.banner_id = icon._id;
+			user.avatarId = icon._id;
+			user.bannerId = icon._id;
 		}
 	} else {
 		const q = userId !== undefined
 			? { _id: userId }
-			: { username_lower: username.toLowerCase(), host: null };
+			: { usernameLower: username.toLowerCase(), host: null };
 
 		user = await findUser(q);
 
diff --git a/src/api/models/channel-watching.ts b/src/api/models/channel-watching.ts
index 23886d0c76..ec0c8135dc 100644
--- a/src/api/models/channel-watching.ts
+++ b/src/api/models/channel-watching.ts
@@ -9,6 +9,6 @@ export interface IChannelWatching {
 	_id: mongo.ObjectID;
 	createdAt: Date;
 	deletedAt: Date;
-	channel_id: mongo.ObjectID;
+	channelId: mongo.ObjectID;
 	userId: mongo.ObjectID;
 }
diff --git a/src/api/models/channel.ts b/src/api/models/channel.ts
index a753a4ebad..aab21db070 100644
--- a/src/api/models/channel.ts
+++ b/src/api/models/channel.ts
@@ -63,7 +63,7 @@ export const pack = (
 		//#region Watchしているかどうか
 		const watch = await Watching.findOne({
 			userId: meId,
-			channel_id: _channel.id,
+			channelId: _channel.id,
 			deletedAt: { $exists: false }
 		});
 
diff --git a/src/api/models/messaging-message.ts b/src/api/models/messaging-message.ts
index 026b23cf36..9a2f813879 100644
--- a/src/api/models/messaging-message.ts
+++ b/src/api/models/messaging-message.ts
@@ -66,16 +66,16 @@ export const pack = (
 	}
 
 	// Populate user
-	_message.user = await packUser(_message.user_id, me);
+	_message.user = await packUser(_message.userId, me);
 
-	if (_message.file_id) {
+	if (_message.fileId) {
 		// Populate file
-		_message.file = await packFile(_message.file_id);
+		_message.file = await packFile(_message.fileId);
 	}
 
 	if (opts.populateRecipient) {
 		// Populate recipient
-		_message.recipient = await packUser(_message.recipient_id, me);
+		_message.recipient = await packUser(_message.recipientId, me);
 	}
 
 	resolve(_message);
diff --git a/src/api/models/notification.ts b/src/api/models/notification.ts
index fa7049d312..910f539479 100644
--- a/src/api/models/notification.ts
+++ b/src/api/models/notification.ts
@@ -9,7 +9,7 @@ export default Notification;
 
 export interface INotification {
 	_id: mongo.ObjectID;
-	created_at: Date;
+	createdAt: Date;
 
 	/**
 	 * 通知の受信者
@@ -19,7 +19,7 @@ export interface INotification {
 	/**
 	 * 通知の受信者
 	 */
-	notifiee_id: mongo.ObjectID;
+	notifieeId: mongo.ObjectID;
 
 	/**
 	 * イニシエータ(initiator)、Origin。通知を行う原因となったユーザー
@@ -29,7 +29,7 @@ export interface INotification {
 	/**
 	 * イニシエータ(initiator)、Origin。通知を行う原因となったユーザー
 	 */
-	notifier_id: mongo.ObjectID;
+	notifierId: mongo.ObjectID;
 
 	/**
 	 * 通知の種類。
@@ -46,7 +46,7 @@ export interface INotification {
 	/**
 	 * 通知が読まれたかどうか
 	 */
-	is_read: Boolean;
+	isRead: Boolean;
 }
 
 /**
@@ -75,15 +75,15 @@ export const pack = (notification: any) => new Promise<any>(async (resolve, reje
 	_notification.id = _notification._id;
 	delete _notification._id;
 
-	// Rename notifier_id to user_id
-	_notification.user_id = _notification.notifier_id;
-	delete _notification.notifier_id;
+	// Rename notifierId to userId
+	_notification.userId = _notification.notifierId;
+	delete _notification.notifierId;
 
-	const me = _notification.notifiee_id;
-	delete _notification.notifiee_id;
+	const me = _notification.notifieeId;
+	delete _notification.notifieeId;
 
 	// Populate notifier
-	_notification.user = await packUser(_notification.user_id, me);
+	_notification.user = await packUser(_notification.userId, me);
 
 	switch (_notification.type) {
 		case 'follow':
@@ -96,7 +96,7 @@ export const pack = (notification: any) => new Promise<any>(async (resolve, reje
 		case 'reaction':
 		case 'poll_vote':
 			// Populate post
-			_notification.post = await packPost(_notification.post_id, me);
+			_notification.post = await packPost(_notification.postId, me);
 			break;
 		default:
 			console.error(`Unknown type: ${_notification.type}`);
diff --git a/src/api/models/othello-game.ts b/src/api/models/othello-game.ts
index b9e57632d4..70e0c696c8 100644
--- a/src/api/models/othello-game.ts
+++ b/src/api/models/othello-game.ts
@@ -97,10 +97,10 @@ export const pack = (
 	}
 
 	// Populate user
-	_game.user1 = await packUser(_game.user1_id, meId);
-	_game.user2 = await packUser(_game.user2_id, meId);
-	if (_game.winner_id) {
-		_game.winner = await packUser(_game.winner_id, meId);
+	_game.user1 = await packUser(_game.user1Id, meId);
+	_game.user2 = await packUser(_game.user2Id, meId);
+	if (_game.winnerId) {
+		_game.winner = await packUser(_game.winnerId, meId);
 	} else {
 		_game.winner = null;
 	}
diff --git a/src/api/models/othello-matching.ts b/src/api/models/othello-matching.ts
index 9c84d7fb9f..8beedf72cf 100644
--- a/src/api/models/othello-matching.ts
+++ b/src/api/models/othello-matching.ts
@@ -37,8 +37,8 @@ export const pack = (
 	delete _matching._id;
 
 	// Populate user
-	_matching.parent = await packUser(_matching.parent_id, meId);
-	_matching.child = await packUser(_matching.child_id, meId);
+	_matching.parent = await packUser(_matching.parentId, meId);
+	_matching.child = await packUser(_matching.childId, meId);
 
 	resolve(_matching);
 });
diff --git a/src/api/models/post-reaction.ts b/src/api/models/post-reaction.ts
index f581f01535..82613eb262 100644
--- a/src/api/models/post-reaction.ts
+++ b/src/api/models/post-reaction.ts
@@ -47,7 +47,7 @@ export const pack = (
 	delete _reaction._id;
 
 	// Populate user
-	_reaction.user = await packUser(_reaction.user_id, me);
+	_reaction.user = await packUser(_reaction.userId, me);
 
 	resolve(_reaction);
 });
diff --git a/src/api/models/post.ts b/src/api/models/post.ts
index fc44256516..4ab840b5ed 100644
--- a/src/api/models/post.ts
+++ b/src/api/models/post.ts
@@ -100,21 +100,21 @@ export const pack = async (
 	}
 
 	// Populate user
-	_post.user = packUser(_post.user_id, meId);
+	_post.user = packUser(_post.userId, meId);
 
 	// Populate app
-	if (_post.app_id) {
-		_post.app = packApp(_post.app_id);
+	if (_post.appId) {
+		_post.app = packApp(_post.appId);
 	}
 
 	// Populate channel
-	if (_post.channel_id) {
-		_post.channel = packChannel(_post.channel_id);
+	if (_post.channelId) {
+		_post.channel = packChannel(_post.channelId);
 	}
 
 	// Populate media
-	if (_post.media_ids) {
-		_post.media = Promise.all(_post.media_ids.map(fileId =>
+	if (_post.mediaIds) {
+		_post.media = Promise.all(_post.mediaIds.map(fileId =>
 			packFile(fileId)
 		));
 	}
@@ -124,7 +124,7 @@ export const pack = async (
 		// Get previous post info
 		_post.prev = (async () => {
 			const prev = await Post.findOne({
-				user_id: _post.user_id,
+				userId: _post.userId,
 				_id: {
 					$lt: id
 				}
@@ -142,7 +142,7 @@ export const pack = async (
 		// Get next post info
 		_post.next = (async () => {
 			const next = await Post.findOne({
-				user_id: _post.user_id,
+				userId: _post.userId,
 				_id: {
 					$gt: id
 				}
@@ -157,16 +157,16 @@ export const pack = async (
 			return next ? next._id : null;
 		})();
 
-		if (_post.reply_id) {
+		if (_post.replyId) {
 			// Populate reply to post
-			_post.reply = pack(_post.reply_id, meId, {
+			_post.reply = pack(_post.replyId, meId, {
 				detail: false
 			});
 		}
 
-		if (_post.repost_id) {
+		if (_post.repostId) {
 			// Populate repost
-			_post.repost = pack(_post.repost_id, meId, {
+			_post.repost = pack(_post.repostId, meId, {
 				detail: _post.text == null
 			});
 		}
@@ -176,8 +176,8 @@ export const pack = async (
 			_post.poll = (async (poll) => {
 				const vote = await Vote
 					.findOne({
-						user_id: meId,
-						post_id: id
+						userId: meId,
+						postId: id
 					});
 
 				if (vote != null) {
@@ -196,9 +196,9 @@ export const pack = async (
 			_post.my_reaction = (async () => {
 				const reaction = await Reaction
 					.findOne({
-						user_id: meId,
-						post_id: id,
-						deleted_at: { $exists: false }
+						userId: meId,
+						postId: id,
+						deletedAt: { $exists: false }
 					});
 
 				if (reaction) {
diff --git a/src/api/models/user.ts b/src/api/models/user.ts
index 9aa7c4efae..8c68b06dfa 100644
--- a/src/api/models/user.ts
+++ b/src/api/models/user.ts
@@ -47,24 +47,25 @@ export type ILocalAccount = {
 	token: string;
 	twitter: {
 		accessToken: string;
-		access_token_secret: string;
-		user_id: string;
-		screen_name: string;
+		accessTokenSecret: string;
+		userId: string;
+		screenName: string;
 	};
 	line: {
-		user_id: string;
+		userId: string;
 	};
 	profile: {
 		location: string;
 		birthday: string; // 'YYYY-MM-DD'
 		tags: string[];
 	};
-	last_used_at: Date;
-	is_bot: boolean;
-	is_pro: boolean;
-	two_factor_secret: string;
-	two_factor_enabled: boolean;
-	client_settings: any;
+	lastUsedAt: Date;
+	isBot: boolean;
+	isPro: boolean;
+	twoFactorSecret: string;
+	twoFactorEnabled: boolean;
+	twoFactorTempSecret: string;
+	clientSettings: any;
 	settings: any;
 };
 
@@ -74,33 +75,33 @@ export type IRemoteAccount = {
 
 export type IUser = {
 	_id: mongo.ObjectID;
-	created_at: Date;
-	deleted_at: Date;
-	followers_count: number;
-	following_count: number;
+	createdAt: Date;
+	deletedAt: Date;
+	followersCount: number;
+	followingCount: number;
 	name: string;
-	posts_count: number;
-	drive_capacity: number;
+	postsCount: number;
+	driveCapacity: number;
 	username: string;
-	username_lower: string;
-	avatar_id: mongo.ObjectID;
-	banner_id: mongo.ObjectID;
+	usernameLower: string;
+	avatarId: mongo.ObjectID;
+	bannerId: mongo.ObjectID;
 	data: any;
 	description: string;
 	latest_post: IPost;
-	pinned_post_id: mongo.ObjectID;
-	is_suspended: boolean;
+	pinnedPostId: mongo.ObjectID;
+	isSuspended: boolean;
 	keywords: string[];
 	host: string;
-	host_lower: string;
+	hostLower: string;
 	account: ILocalAccount | IRemoteAccount;
 };
 
 export function init(user): IUser {
 	user._id = new mongo.ObjectID(user._id);
-	user.avatar_id = new mongo.ObjectID(user.avatar_id);
-	user.banner_id = new mongo.ObjectID(user.banner_id);
-	user.pinned_post_id = new mongo.ObjectID(user.pinned_post_id);
+	user.avatarId = new mongo.ObjectID(user.avatarId);
+	user.bannerId = new mongo.ObjectID(user.bannerId);
+	user.pinnedPostId = new mongo.ObjectID(user.pinnedPostId);
 	return user;
 }
 
@@ -131,7 +132,7 @@ export const pack = (
 	const fields = opts.detail ? {
 	} : {
 		'account.settings': false,
-		'account.client_settings': false,
+		'account.clientSettings': false,
 		'account.profile': false,
 		'account.keywords': false,
 		'account.domains': false
@@ -173,12 +174,12 @@ export const pack = (
 		delete _user.account.keypair;
 		delete _user.account.password;
 		delete _user.account.token;
-		delete _user.account.two_factor_temp_secret;
-		delete _user.account.two_factor_secret;
-		delete _user.username_lower;
+		delete _user.account.twoFactorTempSecret;
+		delete _user.account.twoFactorSecret;
+		delete _user.usernameLower;
 		if (_user.account.twitter) {
-			delete _user.account.twitter.access_token;
-			delete _user.account.twitter.access_token_secret;
+			delete _user.account.twitter.accessToken;
+			delete _user.account.twitter.accessTokenSecret;
 		}
 		delete _user.account.line;
 
@@ -186,36 +187,36 @@ export const pack = (
 		if (!opts.includeSecrets) {
 			delete _user.account.email;
 			delete _user.account.settings;
-			delete _user.account.client_settings;
+			delete _user.account.clientSettings;
 		}
 
 		if (!opts.detail) {
-			delete _user.account.two_factor_enabled;
+			delete _user.account.twoFactorEnabled;
 		}
 	}
 
-	_user.avatar_url = _user.avatar_id != null
-		? `${config.drive_url}/${_user.avatar_id}`
+	_user.avatar_url = _user.avatarId != null
+		? `${config.drive_url}/${_user.avatarId}`
 		: `${config.drive_url}/default-avatar.jpg`;
 
-	_user.banner_url = _user.banner_id != null
-		? `${config.drive_url}/${_user.banner_id}`
+	_user.banner_url = _user.bannerId != null
+		? `${config.drive_url}/${_user.bannerId}`
 		: null;
 
 	if (!meId || !meId.equals(_user.id) || !opts.detail) {
-		delete _user.avatar_id;
-		delete _user.banner_id;
+		delete _user.avatarId;
+		delete _user.bannerId;
 
-		delete _user.drive_capacity;
+		delete _user.driveCapacity;
 	}
 
 	if (meId && !meId.equals(_user.id)) {
 		// Whether the user is following
 		_user.is_following = (async () => {
 			const follow = await Following.findOne({
-				follower_id: meId,
-				followee_id: _user.id,
-				deleted_at: { $exists: false }
+				followerId: meId,
+				followeeId: _user.id,
+				deletedAt: { $exists: false }
 			});
 			return follow !== null;
 		})();
@@ -223,9 +224,9 @@ export const pack = (
 		// Whether the user is followed
 		_user.is_followed = (async () => {
 			const follow2 = await Following.findOne({
-				follower_id: _user.id,
-				followee_id: meId,
-				deleted_at: { $exists: false }
+				followerId: _user.id,
+				followeeId: meId,
+				deletedAt: { $exists: false }
 			});
 			return follow2 !== null;
 		})();
@@ -233,18 +234,18 @@ export const pack = (
 		// Whether the user is muted
 		_user.is_muted = (async () => {
 			const mute = await Mute.findOne({
-				muter_id: meId,
-				mutee_id: _user.id,
-				deleted_at: { $exists: false }
+				muterId: meId,
+				muteeId: _user.id,
+				deletedAt: { $exists: false }
 			});
 			return mute !== null;
 		})();
 	}
 
 	if (opts.detail) {
-		if (_user.pinned_post_id) {
+		if (_user.pinnedPostId) {
 			// Populate pinned post
-			_user.pinned_post = packPost(_user.pinned_post_id, meId, {
+			_user.pinnedPost = packPost(_user.pinnedPostId, meId, {
 				detail: true
 			});
 		}
@@ -254,16 +255,16 @@ export const pack = (
 
 			// Get following you know count
 			_user.following_you_know_count = Following.count({
-				followee_id: { $in: myFollowingIds },
-				follower_id: _user.id,
-				deleted_at: { $exists: false }
+				followeeId: { $in: myFollowingIds },
+				followerId: _user.id,
+				deletedAt: { $exists: false }
 			});
 
 			// Get followers you know count
 			_user.followers_you_know_count = Following.count({
-				followee_id: _user.id,
-				follower_id: { $in: myFollowingIds },
-				deleted_at: { $exists: false }
+				followeeId: _user.id,
+				followerId: { $in: myFollowingIds },
+				deletedAt: { $exists: false }
 			});
 		}
 	}
@@ -322,7 +323,7 @@ export const packForAp = (
 		"name": _user.name,
 		"summary": _user.description,
 		"icon": [
-			`${config.drive_url}/${_user.avatar_id}`
+			`${config.drive_url}/${_user.avatarId}`
 		]
 	});
 });
diff --git a/src/api/private/signin.ts b/src/api/private/signin.ts
index 00dcb8afc8..c6b5d19ea6 100644
--- a/src/api/private/signin.ts
+++ b/src/api/private/signin.ts
@@ -32,7 +32,7 @@ export default async (req: express.Request, res: express.Response) => {
 
 	// Fetch user
 	const user: IUser = await User.findOne({
-		username_lower: username.toLowerCase(),
+		usernameLower: username.toLowerCase(),
 		host: null
 	}, {
 		fields: {
@@ -54,9 +54,9 @@ export default async (req: express.Request, res: express.Response) => {
 	const same = await bcrypt.compare(password, account.password);
 
 	if (same) {
-		if (account.two_factor_enabled) {
+		if (account.twoFactorEnabled) {
 			const verified = (speakeasy as any).totp.verify({
-				secret: account.two_factor_secret,
+				secret: account.twoFactorSecret,
 				encoding: 'base32',
 				token: token
 			});
@@ -79,8 +79,8 @@ export default async (req: express.Request, res: express.Response) => {
 
 	// Append signin history
 	const record = await Signin.insert({
-		created_at: new Date(),
-		user_id: user._id,
+		createdAt: new Date(),
+		userId: user._id,
 		ip: req.ip,
 		headers: req.headers,
 		success: same
diff --git a/src/api/private/signup.ts b/src/api/private/signup.ts
index 29d75b62f9..1304ccb54c 100644
--- a/src/api/private/signup.ts
+++ b/src/api/private/signup.ts
@@ -64,7 +64,7 @@ export default async (req: express.Request, res: express.Response) => {
 	// Fetch exist user that same username
 	const usernameExist = await User
 		.count({
-			username_lower: username.toLowerCase(),
+			usernameLower: username.toLowerCase(),
 			host: null
 		}, {
 			limit: 1
@@ -107,19 +107,19 @@ export default async (req: express.Request, res: express.Response) => {
 
 	// Create account
 	const account: IUser = await User.insert({
-		avatar_id: null,
-		banner_id: null,
-		created_at: new Date(),
+		avatarId: null,
+		bannerId: null,
+		createdAt: new Date(),
 		description: null,
-		followers_count: 0,
-		following_count: 0,
+		followersCount: 0,
+		followingCount: 0,
 		name: name,
-		posts_count: 0,
-		drive_capacity: 1073741824, // 1GB
+		postsCount: 0,
+		driveCapacity: 1073741824, // 1GB
 		username: username,
-		username_lower: username.toLowerCase(),
+		usernameLower: username.toLowerCase(),
 		host: null,
-		host_lower: null,
+		hostLower: null,
 		account: {
 			keypair: generateKeypair(),
 			token: secret,
@@ -139,7 +139,7 @@ export default async (req: express.Request, res: express.Response) => {
 			settings: {
 				auto_watch: true
 			},
-			client_settings: {
+			clientSettings: {
 				home: homeData
 			}
 		}
diff --git a/src/api/service/github.ts b/src/api/service/github.ts
index 1c78267c0f..598f36b0cf 100644
--- a/src/api/service/github.ts
+++ b/src/api/service/github.ts
@@ -9,7 +9,7 @@ module.exports = async (app: express.Application) => {
 	if (config.github_bot == null) return;
 
 	const bot = await User.findOne({
-		username_lower: config.github_bot.username.toLowerCase()
+		usernameLower: config.github_bot.username.toLowerCase()
 	});
 
 	if (bot == null) {
diff --git a/src/api/service/twitter.ts b/src/api/service/twitter.ts
index c1f2e48a63..67c401efac 100644
--- a/src/api/service/twitter.ts
+++ b/src/api/service/twitter.ts
@@ -128,7 +128,7 @@ module.exports = (app: express.Application) => {
 
 				const user = await User.findOne({
 					host: null,
-					'account.twitter.user_id': result.userId
+					'account.twitter.userId': result.userId
 				});
 
 				if (user == null) {
@@ -155,10 +155,10 @@ module.exports = (app: express.Application) => {
 				}, {
 					$set: {
 						'account.twitter': {
-							access_token: result.accessToken,
-							access_token_secret: result.accessTokenSecret,
-							user_id: result.userId,
-							screen_name: result.screenName
+							accessToken: result.accessToken,
+							accessTokenSecret: result.accessTokenSecret,
+							userId: result.userId,
+							screenName: result.screenName
 						}
 					}
 				});
diff --git a/src/api/stream/home.ts b/src/api/stream/home.ts
index 1ef0f33b4b..291be0824d 100644
--- a/src/api/stream/home.ts
+++ b/src/api/stream/home.ts
@@ -14,10 +14,10 @@ export default async function(request: websocket.request, connection: websocket.
 	subscriber.subscribe(`misskey:user-stream:${user._id}`);
 
 	const mute = await Mute.find({
-		muter_id: user._id,
-		deleted_at: { $exists: false }
+		muterId: user._id,
+		deletedAt: { $exists: false }
 	});
-	const mutedUserIds = mute.map(m => m.mutee_id.toString());
+	const mutedUserIds = mute.map(m => m.muteeId.toString());
 
 	subscriber.on('message', async (channel, data) => {
 		switch (channel.split(':')[1]) {
@@ -26,17 +26,17 @@ export default async function(request: websocket.request, connection: websocket.
 					const x = JSON.parse(data);
 
 					if (x.type == 'post') {
-						if (mutedUserIds.indexOf(x.body.user_id) != -1) {
+						if (mutedUserIds.indexOf(x.body.userId) != -1) {
 							return;
 						}
-						if (x.body.reply != null && mutedUserIds.indexOf(x.body.reply.user_id) != -1) {
+						if (x.body.reply != null && mutedUserIds.indexOf(x.body.reply.userId) != -1) {
 							return;
 						}
-						if (x.body.repost != null && mutedUserIds.indexOf(x.body.repost.user_id) != -1) {
+						if (x.body.repost != null && mutedUserIds.indexOf(x.body.repost.userId) != -1) {
 							return;
 						}
 					} else if (x.type == 'notification') {
-						if (mutedUserIds.indexOf(x.body.user_id) != -1) {
+						if (mutedUserIds.indexOf(x.body.userId) != -1) {
 							return;
 						}
 					}
@@ -74,7 +74,7 @@ export default async function(request: websocket.request, connection: websocket.
 				// Update lastUsedAt
 				User.update({ _id: user._id }, {
 					$set: {
-						'account.last_used_at': new Date()
+						'account.lastUsedAt': new Date()
 					}
 				});
 				break;
diff --git a/src/api/stream/othello-game.ts b/src/api/stream/othello-game.ts
index 45a931c7e7..e48d93cddc 100644
--- a/src/api/stream/othello-game.ts
+++ b/src/api/stream/othello-game.ts
@@ -62,10 +62,10 @@ export default function(request: websocket.request, connection: websocket.connec
 	async function updateSettings(settings) {
 		const game = await OthelloGame.findOne({ _id: gameId });
 
-		if (game.is_started) return;
-		if (!game.user1_id.equals(user._id) && !game.user2_id.equals(user._id)) return;
-		if (game.user1_id.equals(user._id) && game.user1_accepted) return;
-		if (game.user2_id.equals(user._id) && game.user2_accepted) return;
+		if (game.isStarted) return;
+		if (!game.user1Id.equals(user._id) && !game.user2Id.equals(user._id)) return;
+		if (game.user1Id.equals(user._id) && game.user1Accepted) return;
+		if (game.user2Id.equals(user._id) && game.user2Accepted) return;
 
 		await OthelloGame.update({ _id: gameId }, {
 			$set: {
@@ -79,10 +79,10 @@ export default function(request: websocket.request, connection: websocket.connec
 	async function initForm(form) {
 		const game = await OthelloGame.findOne({ _id: gameId });
 
-		if (game.is_started) return;
-		if (!game.user1_id.equals(user._id) && !game.user2_id.equals(user._id)) return;
+		if (game.isStarted) return;
+		if (!game.user1Id.equals(user._id) && !game.user2Id.equals(user._id)) return;
 
-		const set = game.user1_id.equals(user._id) ? {
+		const set = game.user1Id.equals(user._id) ? {
 			form1: form
 		} : {
 			form2: form
@@ -93,7 +93,7 @@ export default function(request: websocket.request, connection: websocket.connec
 		});
 
 		publishOthelloGameStream(gameId, 'init-form', {
-			user_id: user._id,
+			userId: user._id,
 			form
 		});
 	}
@@ -101,10 +101,10 @@ export default function(request: websocket.request, connection: websocket.connec
 	async function updateForm(id, value) {
 		const game = await OthelloGame.findOne({ _id: gameId });
 
-		if (game.is_started) return;
-		if (!game.user1_id.equals(user._id) && !game.user2_id.equals(user._id)) return;
+		if (game.isStarted) return;
+		if (!game.user1Id.equals(user._id) && !game.user2Id.equals(user._id)) return;
 
-		const form = game.user1_id.equals(user._id) ? game.form2 : game.form1;
+		const form = game.user1Id.equals(user._id) ? game.form2 : game.form1;
 
 		const item = form.find(i => i.id == id);
 
@@ -112,7 +112,7 @@ export default function(request: websocket.request, connection: websocket.connec
 
 		item.value = value;
 
-		const set = game.user1_id.equals(user._id) ? {
+		const set = game.user1Id.equals(user._id) ? {
 			form2: form
 		} : {
 			form1: form
@@ -123,7 +123,7 @@ export default function(request: websocket.request, connection: websocket.connec
 		});
 
 		publishOthelloGameStream(gameId, 'update-form', {
-			user_id: user._id,
+			userId: user._id,
 			id,
 			value
 		});
@@ -132,7 +132,7 @@ export default function(request: websocket.request, connection: websocket.connec
 	async function message(message) {
 		message.id = Math.random();
 		publishOthelloGameStream(gameId, 'message', {
-			user_id: user._id,
+			userId: user._id,
 			message
 		});
 	}
@@ -140,36 +140,36 @@ export default function(request: websocket.request, connection: websocket.connec
 	async function accept(accept: boolean) {
 		const game = await OthelloGame.findOne({ _id: gameId });
 
-		if (game.is_started) return;
+		if (game.isStarted) return;
 
 		let bothAccepted = false;
 
-		if (game.user1_id.equals(user._id)) {
+		if (game.user1Id.equals(user._id)) {
 			await OthelloGame.update({ _id: gameId }, {
 				$set: {
-					user1_accepted: accept
+					user1Accepted: accept
 				}
 			});
 
 			publishOthelloGameStream(gameId, 'change-accepts', {
 				user1: accept,
-				user2: game.user2_accepted
+				user2: game.user2Accepted
 			});
 
-			if (accept && game.user2_accepted) bothAccepted = true;
-		} else if (game.user2_id.equals(user._id)) {
+			if (accept && game.user2Accepted) bothAccepted = true;
+		} else if (game.user2Id.equals(user._id)) {
 			await OthelloGame.update({ _id: gameId }, {
 				$set: {
-					user2_accepted: accept
+					user2Accepted: accept
 				}
 			});
 
 			publishOthelloGameStream(gameId, 'change-accepts', {
-				user1: game.user1_accepted,
+				user1: game.user1Accepted,
 				user2: accept
 			});
 
-			if (accept && game.user1_accepted) bothAccepted = true;
+			if (accept && game.user1Accepted) bothAccepted = true;
 		} else {
 			return;
 		}
@@ -178,8 +178,8 @@ export default function(request: websocket.request, connection: websocket.connec
 			// 3秒後、まだacceptされていたらゲーム開始
 			setTimeout(async () => {
 				const freshGame = await OthelloGame.findOne({ _id: gameId });
-				if (freshGame == null || freshGame.is_started || freshGame.is_ended) return;
-				if (!freshGame.user1_accepted || !freshGame.user2_accepted) return;
+				if (freshGame == null || freshGame.isStarted || freshGame.isEnded) return;
+				if (!freshGame.user1Accepted || !freshGame.user2Accepted) return;
 
 				let bw: number;
 				if (freshGame.settings.bw == 'random') {
@@ -198,8 +198,8 @@ export default function(request: websocket.request, connection: websocket.connec
 
 				await OthelloGame.update({ _id: gameId }, {
 					$set: {
-						started_at: new Date(),
-						is_started: true,
+						startedAt: new Date(),
+						isStarted: true,
 						black: bw,
 						'settings.map': map
 					}
@@ -207,17 +207,17 @@ export default function(request: websocket.request, connection: websocket.connec
 
 				//#region 盤面に最初から石がないなどして始まった瞬間に勝敗が決定する場合があるのでその処理
 				const o = new Othello(map, {
-					isLlotheo: freshGame.settings.is_llotheo,
-					canPutEverywhere: freshGame.settings.can_put_everywhere,
-					loopedBoard: freshGame.settings.looped_board
+					isLlotheo: freshGame.settings.isLlotheo,
+					canPutEverywhere: freshGame.settings.canPutEverywhere,
+					loopedBoard: freshGame.settings.loopedBoard
 				});
 
 				if (o.isEnded) {
 					let winner;
 					if (o.winner === true) {
-						winner = freshGame.black == 1 ? freshGame.user1_id : freshGame.user2_id;
+						winner = freshGame.black == 1 ? freshGame.user1Id : freshGame.user2Id;
 					} else if (o.winner === false) {
-						winner = freshGame.black == 1 ? freshGame.user2_id : freshGame.user1_id;
+						winner = freshGame.black == 1 ? freshGame.user2Id : freshGame.user1Id;
 					} else {
 						winner = null;
 					}
@@ -226,13 +226,13 @@ export default function(request: websocket.request, connection: websocket.connec
 						_id: gameId
 					}, {
 						$set: {
-							is_ended: true,
-							winner_id: winner
+							isEnded: true,
+							winnerId: winner
 						}
 					});
 
 					publishOthelloGameStream(gameId, 'ended', {
-						winner_id: winner,
+						winnerId: winner,
 						game: await pack(gameId, user)
 					});
 				}
@@ -247,14 +247,14 @@ export default function(request: websocket.request, connection: websocket.connec
 	async function set(pos) {
 		const game = await OthelloGame.findOne({ _id: gameId });
 
-		if (!game.is_started) return;
-		if (game.is_ended) return;
-		if (!game.user1_id.equals(user._id) && !game.user2_id.equals(user._id)) return;
+		if (!game.isStarted) return;
+		if (game.isEnded) return;
+		if (!game.user1Id.equals(user._id) && !game.user2Id.equals(user._id)) return;
 
 		const o = new Othello(game.settings.map, {
-			isLlotheo: game.settings.is_llotheo,
-			canPutEverywhere: game.settings.can_put_everywhere,
-			loopedBoard: game.settings.looped_board
+			isLlotheo: game.settings.isLlotheo,
+			canPutEverywhere: game.settings.canPutEverywhere,
+			loopedBoard: game.settings.loopedBoard
 		});
 
 		game.logs.forEach(log => {
@@ -262,7 +262,7 @@ export default function(request: websocket.request, connection: websocket.connec
 		});
 
 		const myColor =
-			(game.user1_id.equals(user._id) && game.black == 1) || (game.user2_id.equals(user._id) && game.black == 2)
+			(game.user1Id.equals(user._id) && game.black == 1) || (game.user2Id.equals(user._id) && game.black == 2)
 				? true
 				: false;
 
@@ -272,9 +272,9 @@ export default function(request: websocket.request, connection: websocket.connec
 		let winner;
 		if (o.isEnded) {
 			if (o.winner === true) {
-				winner = game.black == 1 ? game.user1_id : game.user2_id;
+				winner = game.black == 1 ? game.user1Id : game.user2Id;
 			} else if (o.winner === false) {
-				winner = game.black == 1 ? game.user2_id : game.user1_id;
+				winner = game.black == 1 ? game.user2Id : game.user1Id;
 			} else {
 				winner = null;
 			}
@@ -293,8 +293,8 @@ export default function(request: websocket.request, connection: websocket.connec
 		}, {
 			$set: {
 				crc32,
-				is_ended: o.isEnded,
-				winner_id: winner
+				isEnded: o.isEnded,
+				winnerId: winner
 			},
 			$push: {
 				logs: log
@@ -307,7 +307,7 @@ export default function(request: websocket.request, connection: websocket.connec
 
 		if (o.isEnded) {
 			publishOthelloGameStream(gameId, 'ended', {
-				winner_id: winner,
+				winnerId: winner,
 				game: await pack(gameId, user)
 			});
 		}
@@ -316,7 +316,7 @@ export default function(request: websocket.request, connection: websocket.connec
 	async function check(crc32) {
 		const game = await OthelloGame.findOne({ _id: gameId });
 
-		if (!game.is_started) return;
+		if (!game.isStarted) return;
 
 		// 互換性のため
 		if (game.crc32 == null) return;
diff --git a/src/api/stream/othello.ts b/src/api/stream/othello.ts
index bd3b4a7637..55c993ec85 100644
--- a/src/api/stream/othello.ts
+++ b/src/api/stream/othello.ts
@@ -18,11 +18,11 @@ export default function(request: websocket.request, connection: websocket.connec
 			case 'ping':
 				if (msg.id == null) return;
 				const matching = await Matching.findOne({
-					parent_id: user._id,
-					child_id: new mongo.ObjectID(msg.id)
+					parentId: user._id,
+					childId: new mongo.ObjectID(msg.id)
 				});
 				if (matching == null) return;
-				publishUserStream(matching.child_id, 'othello_invited', await pack(matching, matching.child_id));
+				publishUserStream(matching.childId, 'othello_invited', await pack(matching, matching.childId));
 				break;
 		}
 	});
diff --git a/src/api/streaming.ts b/src/api/streaming.ts
index a6759e414c..31319fcab6 100644
--- a/src/api/streaming.ts
+++ b/src/api/streaming.ts
@@ -110,7 +110,7 @@ function authenticate(token: string): Promise<IUser> {
 
 			// Fetch user
 			const user: IUser = await User
-				.findOne({ _id: accessToken.user_id });
+				.findOne({ _id: accessToken.userId });
 
 			resolve(user);
 		}
diff --git a/src/common/get-post-summary.ts b/src/common/get-post-summary.ts
index 6e8f65708e..8d0033064f 100644
--- a/src/common/get-post-summary.ts
+++ b/src/common/get-post-summary.ts
@@ -22,7 +22,7 @@ const summarize = (post: any): string => {
 	}
 
 	// 返信のとき
-	if (post.reply_id) {
+	if (post.replyId) {
 		if (post.reply) {
 			summary += ` RE: ${summarize(post.reply)}`;
 		} else {
@@ -31,7 +31,7 @@ const summarize = (post: any): string => {
 	}
 
 	// Repostのとき
-	if (post.repost_id) {
+	if (post.repostId) {
 		if (post.repost) {
 			summary += ` RP: ${summarize(post.repost)}`;
 		} else {
diff --git a/src/common/othello/ai/back.ts b/src/common/othello/ai/back.ts
index 27dbc39529..52f01ff97b 100644
--- a/src/common/othello/ai/back.ts
+++ b/src/common/othello/ai/back.ts
@@ -44,7 +44,7 @@ process.on('message', async msg => {
 		//#region TLに投稿する
 		const game = msg.body;
 		const url = `${conf.url}/othello/${game.id}`;
-		const user = game.user1_id == id ? game.user2 : game.user1;
+		const user = game.user1Id == id ? game.user2 : game.user1;
 		const isSettai = form[0].value === 0;
 		const text = isSettai
 			? `?[${user.name}](${conf.url}/@${user.username})さんの接待を始めました！`
@@ -68,23 +68,23 @@ process.on('message', async msg => {
 		});
 
 		//#region TLに投稿する
-		const user = game.user1_id == id ? game.user2 : game.user1;
+		const user = game.user1Id == id ? game.user2 : game.user1;
 		const isSettai = form[0].value === 0;
 		const text = isSettai
-			? msg.body.winner_id === null
+			? msg.body.winnerId === null
 				? `?[${user.name}](${conf.url}/@${user.username})さんに接待で引き分けました...`
-				: msg.body.winner_id == id
+				: msg.body.winnerId == id
 					? `?[${user.name}](${conf.url}/@${user.username})さんに接待で勝ってしまいました...`
 					: `?[${user.name}](${conf.url}/@${user.username})さんに接待で負けてあげました♪`
-			: msg.body.winner_id === null
+			: msg.body.winnerId === null
 				? `?[${user.name}](${conf.url}/@${user.username})さんと引き分けました～`
-				: msg.body.winner_id == id
+				: msg.body.winnerId == id
 					? `?[${user.name}](${conf.url}/@${user.username})さんに勝ちました♪`
 					: `?[${user.name}](${conf.url}/@${user.username})さんに負けました...`;
 
 		await request.post(`${conf.api_url}/posts/create`, {
 			json: { i,
-				repost_id: post.id,
+				repostId: post.id,
 				text: text
 			}
 		});
@@ -114,9 +114,9 @@ function onGameStarted(g) {
 
 	// オセロエンジン初期化
 	o = new Othello(game.settings.map, {
-		isLlotheo: game.settings.is_llotheo,
-		canPutEverywhere: game.settings.can_put_everywhere,
-		loopedBoard: game.settings.looped_board
+		isLlotheo: game.settings.isLlotheo,
+		canPutEverywhere: game.settings.canPutEverywhere,
+		loopedBoard: game.settings.loopedBoard
 	});
 
 	// 各マスの価値を計算しておく
@@ -141,7 +141,7 @@ function onGameStarted(g) {
 		return count >= 4 ? 1 : 0;
 	});
 
-	botColor = game.user1_id == id && game.black == 1 || game.user2_id == id && game.black == 2;
+	botColor = game.user1Id == id && game.black == 1 || game.user2Id == id && game.black == 2;
 
 	if (botColor) {
 		think();
@@ -188,7 +188,7 @@ function think() {
 		});
 
 		// ロセオならスコアを反転
-		if (game.settings.is_llotheo) score = -score;
+		if (game.settings.isLlotheo) score = -score;
 
 		// 接待ならスコアを反転
 		if (isSettai) score = -score;
@@ -234,7 +234,7 @@ function think() {
 
 			let score;
 
-			if (game.settings.is_llotheo) {
+			if (game.settings.isLlotheo) {
 				// 勝ちは勝ちでも、より自分の石を少なくした方が美しい勝ちだと判定する
 				score = o.winner ? base - (o.blackCount * 100) : base - (o.whiteCount * 100);
 			} else {
@@ -317,7 +317,7 @@ function think() {
 
 			let score;
 
-			if (game.settings.is_llotheo) {
+			if (game.settings.isLlotheo) {
 				// 勝ちは勝ちでも、より自分の石を少なくした方が美しい勝ちだと判定する
 				score = o.winner ? base - (o.blackCount * 100) : base - (o.whiteCount * 100);
 			} else {
diff --git a/src/common/othello/ai/front.ts b/src/common/othello/ai/front.ts
index d892afbeda..e5496132f6 100644
--- a/src/common/othello/ai/front.ts
+++ b/src/common/othello/ai/front.ts
@@ -48,12 +48,12 @@ homeStream.on('message', message => {
 	if (msg.type == 'mention' || msg.type == 'reply') {
 		const post = msg.body;
 
-		if (post.user_id == id) return;
+		if (post.userId == id) return;
 
 		// リアクションする
 		request.post(`${conf.api_url}/posts/reactions/create`, {
 			json: { i,
-				post_id: post.id,
+				postId: post.id,
 				reaction: 'love'
 			}
 		});
@@ -62,12 +62,12 @@ homeStream.on('message', message => {
 			if (post.text.indexOf('オセロ') > -1) {
 				request.post(`${conf.api_url}/posts/create`, {
 					json: { i,
-						reply_id: post.id,
+						replyId: post.id,
 						text: '良いですよ～'
 					}
 				});
 
-				invite(post.user_id);
+				invite(post.userId);
 			}
 		}
 	}
@@ -79,12 +79,12 @@ homeStream.on('message', message => {
 			if (message.text.indexOf('オセロ') > -1) {
 				request.post(`${conf.api_url}/messaging/messages/create`, {
 					json: { i,
-						user_id: message.user_id,
+						userId: message.userId,
 						text: '良いですよ～'
 					}
 				});
 
-				invite(message.user_id);
+				invite(message.userId);
 			}
 		}
 	}
@@ -94,7 +94,7 @@ homeStream.on('message', message => {
 function invite(userId) {
 	request.post(`${conf.api_url}/othello/match`, {
 		json: { i,
-			user_id: userId
+			userId: userId
 		}
 	});
 }
@@ -225,7 +225,7 @@ async function onInviteMe(inviter) {
 	const game = await request.post(`${conf.api_url}/othello/match`, {
 		json: {
 			i,
-			user_id: inviter.id
+			userId: inviter.id
 		}
 	});
 
diff --git a/src/common/user/get-summary.ts b/src/common/user/get-summary.ts
index f9b7125e30..b314a5cefb 100644
--- a/src/common/user/get-summary.ts
+++ b/src/common/user/get-summary.ts
@@ -7,7 +7,7 @@ import getAcct from './get-acct';
  */
 export default function(user: IUser): string {
 	let string = `${user.name} (@${getAcct(user)})\n` +
-		`${user.posts_count}投稿、${user.following_count}フォロー、${user.followers_count}フォロワー\n`;
+		`${user.postsCount}投稿、${user.followingCount}フォロー、${user.followersCount}フォロワー\n`;
 
 	if (user.host === null) {
 		const account = user.account as ILocalAccount;
diff --git a/src/config.ts b/src/config.ts
index 6d3e7740b1..0d8df39f44 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -80,7 +80,7 @@ type Source = {
 	};
 	line_bot?: {
 		channel_secret: string;
-		channel_access_token: string;
+		channel_accessToken: string;
 	};
 	analysis?: {
 		mecab_command?: string;
diff --git a/src/tools/analysis/extract-user-domains.ts b/src/tools/analysis/extract-user-domains.ts
index bc120f5c17..0c4249a1b6 100644
--- a/src/tools/analysis/extract-user-domains.ts
+++ b/src/tools/analysis/extract-user-domains.ts
@@ -50,7 +50,7 @@ function extractDomainsOne(id) {
 
 		// Fetch recent posts
 		const recentPosts = await Post.find({
-			user_id: id,
+			userId: id,
 			text: {
 				$exists: true
 			}
diff --git a/src/tools/analysis/extract-user-keywords.ts b/src/tools/analysis/extract-user-keywords.ts
index b99ca93211..08d02e7057 100644
--- a/src/tools/analysis/extract-user-keywords.ts
+++ b/src/tools/analysis/extract-user-keywords.ts
@@ -96,7 +96,7 @@ function extractKeywordsOne(id) {
 
 		// Fetch recent posts
 		const recentPosts = await Post.find({
-			user_id: id,
+			userId: id,
 			text: {
 				$exists: true
 			}
diff --git a/src/tools/analysis/predict-user-interst.ts b/src/tools/analysis/predict-user-interst.ts
index 99bdfa4206..6904daeb07 100644
--- a/src/tools/analysis/predict-user-interst.ts
+++ b/src/tools/analysis/predict-user-interst.ts
@@ -6,7 +6,7 @@ export async function predictOne(id) {
 
 	// TODO: repostなども含める
 	const recentPosts = await Post.find({
-		user_id: id,
+		userId: id,
 		category: {
 			$exists: true
 		}
diff --git a/src/web/app/auth/views/form.vue b/src/web/app/auth/views/form.vue
index d86ed58b38..9d9e8cdb1b 100644
--- a/src/web/app/auth/views/form.vue
+++ b/src/web/app/auth/views/form.vue
@@ -7,7 +7,7 @@
 	<div class="app">
 		<section>
 			<h2>{{ app.name }}</h2>
-			<p class="nid">{{ app.name_id }}</p>
+			<p class="nid">{{ app.nameId }}</p>
 			<p class="description">{{ app.description }}</p>
 		</section>
 		<section>
diff --git a/src/web/app/ch/tags/channel.tag b/src/web/app/ch/tags/channel.tag
index dc4b8e1426..225129088d 100644
--- a/src/web/app/ch/tags/channel.tag
+++ b/src/web/app/ch/tags/channel.tag
@@ -77,7 +77,7 @@
 
 			// チャンネル概要読み込み
 			this.$root.$data.os.api('channels/show', {
-				channel_id: this.id
+				channelId: this.id
 			}).then(channel => {
 				if (fetched) {
 					Progress.done();
@@ -96,7 +96,7 @@
 
 			// 投稿読み込み
 			this.$root.$data.os.api('channels/posts', {
-				channel_id: this.id
+				channelId: this.id
 			}).then(posts => {
 				if (fetched) {
 					Progress.done();
@@ -125,7 +125,7 @@
 			this.posts.unshift(post);
 			this.update();
 
-			if (document.hidden && this.$root.$data.os.isSignedIn && post.user_id !== this.$root.$data.os.i.id) {
+			if (document.hidden && this.$root.$data.os.isSignedIn && post.userId !== this.$root.$data.os.i.id) {
 				this.unreadCount++;
 				document.title = `(${this.unreadCount}) ${this.channel.title} | Misskey`;
 			}
@@ -140,7 +140,7 @@
 
 		this.watch = () => {
 			this.$root.$data.os.api('channels/watch', {
-				channel_id: this.id
+				channelId: this.id
 			}).then(() => {
 				this.channel.is_watching = true;
 				this.update();
@@ -151,7 +151,7 @@
 
 		this.unwatch = () => {
 			this.$root.$data.os.api('channels/unwatch', {
-				channel_id: this.id
+				channelId: this.id
 			}).then(() => {
 				this.channel.is_watching = false;
 				this.update();
@@ -166,8 +166,8 @@
 	<header>
 		<a class="index" @click="reply">{ post.index }:</a>
 		<a class="name" href={ _URL_ + '/@' + acct }><b>{ post.user.name }</b></a>
-		<mk-time time={ post.created_at }/>
-		<mk-time time={ post.created_at } mode="detail"/>
+		<mk-time time={ post.createdAt }/>
+		<mk-time time={ post.createdAt } mode="detail"/>
 		<span>ID:<i>{ acct }</i></span>
 	</header>
 	<div>
@@ -328,9 +328,9 @@
 
 			this.$root.$data.os.api('posts/create', {
 				text: this.$refs.text.value == '' ? undefined : this.$refs.text.value,
-				media_ids: files,
-				reply_id: this.reply ? this.reply.id : undefined,
-				channel_id: this.channel.id
+				mediaIds: files,
+				replyId: this.reply ? this.reply.id : undefined,
+				channelId: this.channel.id
 			}).then(data => {
 				this.clear();
 			}).catch(err => {
diff --git a/src/web/app/common/define-widget.ts b/src/web/app/common/define-widget.ts
index d8d29873a4..27db59b5ee 100644
--- a/src/web/app/common/define-widget.ts
+++ b/src/web/app/common/define-widget.ts
@@ -56,14 +56,14 @@ export default function<T extends object>(data: {
 						id: this.id,
 						data: newProps
 					}).then(() => {
-						(this as any).os.i.account.client_settings.mobile_home.find(w => w.id == this.id).data = newProps;
+						(this as any).os.i.account.clientSettings.mobile_home.find(w => w.id == this.id).data = newProps;
 					});
 				} else {
 					(this as any).api('i/update_home', {
 						id: this.id,
 						data: newProps
 					}).then(() => {
-						(this as any).os.i.account.client_settings.home.find(w => w.id == this.id).data = newProps;
+						(this as any).os.i.account.clientSettings.home.find(w => w.id == this.id).data = newProps;
 					});
 				}
 			}, {
diff --git a/src/web/app/common/mios.ts b/src/web/app/common/mios.ts
index 2c6c9988e7..bcb8b60678 100644
--- a/src/web/app/common/mios.ts
+++ b/src/web/app/common/mios.ts
@@ -294,12 +294,12 @@ export default class MiOS extends EventEmitter {
 		const fetched = me => {
 			if (me) {
 				// デフォルトの設定をマージ
-				me.account.client_settings = Object.assign({
+				me.account.clientSettings = Object.assign({
 					fetchOnScroll: true,
 					showMaps: true,
 					showPostFormOnTopOfTl: false,
 					gradientWindowHeader: false
-				}, me.account.client_settings);
+				}, me.account.clientSettings);
 
 				// ローカルストレージにキャッシュ
 				localStorage.setItem('me', JSON.stringify(me));
diff --git a/src/web/app/common/scripts/streaming/home.ts b/src/web/app/common/scripts/streaming/home.ts
index ffcf6e5360..c198619400 100644
--- a/src/web/app/common/scripts/streaming/home.ts
+++ b/src/web/app/common/scripts/streaming/home.ts
@@ -16,7 +16,7 @@ export class HomeStream extends Stream {
 		// 最終利用日時を更新するため定期的にaliveメッセージを送信
 		setInterval(() => {
 			this.send({ type: 'alive' });
-			me.account.last_used_at = new Date();
+			me.account.lastUsedAt = new Date();
 		}, 1000 * 60);
 
 		// 自分の情報が更新されたとき
diff --git a/src/web/app/common/views/components/messaging-room.form.vue b/src/web/app/common/views/components/messaging-room.form.vue
index 01886b19c8..704f2016d8 100644
--- a/src/web/app/common/views/components/messaging-room.form.vue
+++ b/src/web/app/common/views/components/messaging-room.form.vue
@@ -151,9 +151,9 @@ export default Vue.extend({
 		send() {
 			this.sending = true;
 			(this as any).api('messaging/messages/create', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				text: this.text ? this.text : undefined,
-				file_id: this.file ? this.file.id : undefined
+				fileId: this.file ? this.file.id : undefined
 			}).then(message => {
 				this.clear();
 			}).catch(err => {
@@ -173,7 +173,7 @@ export default Vue.extend({
 			const data = JSON.parse(localStorage.getItem('message_drafts') || '{}');
 
 			data[this.draftId] = {
-				updated_at: new Date(),
+				updatedAt: new Date(),
 				data: {
 					text: this.text,
 					file: this.file
diff --git a/src/web/app/common/views/components/messaging-room.message.vue b/src/web/app/common/views/components/messaging-room.message.vue
index 5f2eb1ba86..d21cce1a0a 100644
--- a/src/web/app/common/views/components/messaging-room.message.vue
+++ b/src/web/app/common/views/components/messaging-room.message.vue
@@ -5,7 +5,7 @@
 	</router-link>
 	<div class="content">
 		<div class="balloon" :data-no-text="message.text == null">
-			<p class="read" v-if="isMe && message.is_read">%i18n:common.tags.mk-messaging-message.is-read%</p>
+			<p class="read" v-if="isMe && message.isRead">%i18n:common.tags.mk-messaging-message.is-read%</p>
 			<button class="delete-button" v-if="isMe" title="%i18n:common.delete%">
 				<img src="/assets/desktop/messaging/delete.png" alt="Delete"/>
 			</button>
@@ -25,7 +25,7 @@
 		<div></div>
 		<mk-url-preview v-for="url in urls" :url="url" :key="url"/>
 		<footer>
-			<mk-time :time="message.created_at"/>
+			<mk-time :time="message.createdAt"/>
 			<template v-if="message.is_edited">%fa:pencil-alt%</template>
 		</footer>
 	</div>
@@ -43,7 +43,7 @@ export default Vue.extend({
 			return getAcct(this.message.user);
 		},
 		isMe(): boolean {
-			return this.message.user_id == (this as any).os.i.id;
+			return this.message.userId == (this as any).os.i.id;
 		},
 		urls(): string[] {
 			if (this.message.ast) {
diff --git a/src/web/app/common/views/components/messaging-room.vue b/src/web/app/common/views/components/messaging-room.vue
index 6ff808b617..36c53fd3fe 100644
--- a/src/web/app/common/views/components/messaging-room.vue
+++ b/src/web/app/common/views/components/messaging-room.vue
@@ -52,8 +52,8 @@ export default Vue.extend({
 	computed: {
 		_messages(): any[] {
 			return (this.messages as any).map(message => {
-				const date = new Date(message.created_at).getDate();
-				const month = new Date(message.created_at).getMonth() + 1;
+				const date = new Date(message.createdAt).getDate();
+				const month = new Date(message.createdAt).getMonth() + 1;
 				message._date = date;
 				message._datetext = `${month}月 ${date}日`;
 				return message;
@@ -123,7 +123,7 @@ export default Vue.extend({
 				const max = this.existMoreMessages ? 20 : 10;
 
 				(this as any).api('messaging/messages', {
-					user_id: this.user.id,
+					userId: this.user.id,
 					limit: max + 1,
 					until_id: this.existMoreMessages ? this.messages[0].id : undefined
 				}).then(messages => {
@@ -158,7 +158,7 @@ export default Vue.extend({
 			const isBottom = this.isBottom();
 
 			this.messages.push(message);
-			if (message.user_id != (this as any).os.i.id && !document.hidden) {
+			if (message.userId != (this as any).os.i.id && !document.hidden) {
 				this.connection.send({
 					type: 'read',
 					id: message.id
@@ -170,7 +170,7 @@ export default Vue.extend({
 				this.$nextTick(() => {
 					this.scrollToBottom();
 				});
-			} else if (message.user_id != (this as any).os.i.id) {
+			} else if (message.userId != (this as any).os.i.id) {
 				// Notify
 				this.notify('%i18n:common.tags.mk-messaging-room.new-message%');
 			}
@@ -181,7 +181,7 @@ export default Vue.extend({
 			ids.forEach(id => {
 				if (this.messages.some(x => x.id == id)) {
 					const exist = this.messages.map(x => x.id).indexOf(id);
-					this.messages[exist].is_read = true;
+					this.messages[exist].isRead = true;
 				}
 			});
 		},
@@ -223,7 +223,7 @@ export default Vue.extend({
 		onVisibilitychange() {
 			if (document.hidden) return;
 			this.messages.forEach(message => {
-				if (message.user_id !== (this as any).os.i.id && !message.is_read) {
+				if (message.userId !== (this as any).os.i.id && !message.isRead) {
 					this.connection.send({
 						type: 'read',
 						id: message.id
diff --git a/src/web/app/common/views/components/messaging.vue b/src/web/app/common/views/components/messaging.vue
index 88574b94d1..0272c67073 100644
--- a/src/web/app/common/views/components/messaging.vue
+++ b/src/web/app/common/views/components/messaging.vue
@@ -26,7 +26,7 @@
 				class="user"
 				:href="`/i/messaging/${getAcct(isMe(message) ? message.recipient : message.user)}`"
 				:data-is-me="isMe(message)"
-				:data-is-read="message.is_read"
+				:data-is-read="message.isRead"
 				@click.prevent="navigate(isMe(message) ? message.recipient : message.user)"
 				:key="message.id"
 			>
@@ -35,7 +35,7 @@
 					<header>
 						<span class="name">{{ isMe(message) ? message.recipient.name : message.user.name }}</span>
 						<span class="username">@{{ getAcct(isMe(message) ? message.recipient : message.user) }}</span>
-						<mk-time :time="message.created_at"/>
+						<mk-time :time="message.createdAt"/>
 					</header>
 					<div class="body">
 						<p class="text"><span class="me" v-if="isMe(message)">%i18n:common.tags.mk-messaging.you%:</span>{{ message.text }}</p>
@@ -95,19 +95,19 @@ export default Vue.extend({
 	methods: {
 		getAcct,
 		isMe(message) {
-			return message.user_id == (this as any).os.i.id;
+			return message.userId == (this as any).os.i.id;
 		},
 		onMessage(message) {
 			this.messages = this.messages.filter(m => !(
-				(m.recipient_id == message.recipient_id && m.user_id == message.user_id) ||
-				(m.recipient_id == message.user_id && m.user_id == message.recipient_id)));
+				(m.recipientId == message.recipientId && m.userId == message.userId) ||
+				(m.recipientId == message.userId && m.userId == message.recipientId)));
 
 			this.messages.unshift(message);
 		},
 		onRead(ids) {
 			ids.forEach(id => {
 				const found = this.messages.find(m => m.id == id);
-				if (found) found.is_read = true;
+				if (found) found.isRead = true;
 			});
 		},
 		search() {
diff --git a/src/web/app/common/views/components/othello.game.vue b/src/web/app/common/views/components/othello.game.vue
index 414d819a55..8150fe07f0 100644
--- a/src/web/app/common/views/components/othello.game.vue
+++ b/src/web/app/common/views/components/othello.game.vue
@@ -3,19 +3,19 @@
 	<header><b>{{ blackUser.name }}</b>(黒) vs <b>{{ whiteUser.name }}</b>(白)</header>
 
 	<div style="overflow: hidden">
-		<p class="turn" v-if="!iAmPlayer && !game.is_ended">{{ turnUser.name }}のターンです<mk-ellipsis/></p>
+		<p class="turn" v-if="!iAmPlayer && !game.isEnded">{{ turnUser.name }}のターンです<mk-ellipsis/></p>
 		<p class="turn" v-if="logPos != logs.length">{{ turnUser.name }}のターン</p>
-		<p class="turn1" v-if="iAmPlayer && !game.is_ended && !isMyTurn">相手のターンです<mk-ellipsis/></p>
-		<p class="turn2" v-if="iAmPlayer && !game.is_ended && isMyTurn" v-animate-css="{ classes: 'tada', iteration: 'infinite' }">あなたのターンです</p>
-		<p class="result" v-if="game.is_ended && logPos == logs.length">
-			<template v-if="game.winner"><b>{{ game.winner.name }}</b>の勝ち{{ game.settings.is_llotheo ? ' (ロセオ)' : '' }}</template>
+		<p class="turn1" v-if="iAmPlayer && !game.isEnded && !isMyTurn">相手のターンです<mk-ellipsis/></p>
+		<p class="turn2" v-if="iAmPlayer && !game.isEnded && isMyTurn" v-animate-css="{ classes: 'tada', iteration: 'infinite' }">あなたのターンです</p>
+		<p class="result" v-if="game.isEnded && logPos == logs.length">
+			<template v-if="game.winner"><b>{{ game.winner.name }}</b>の勝ち{{ game.settings.isLlotheo ? ' (ロセオ)' : '' }}</template>
 			<template v-else>引き分け</template>
 		</p>
 	</div>
 
 	<div class="board" :style="{ 'grid-template-rows': `repeat(${ game.settings.map.length }, 1fr)`, 'grid-template-columns': `repeat(${ game.settings.map[0].length }, 1fr)` }">
 		<div v-for="(stone, i) in o.board"
-			:class="{ empty: stone == null, none: o.map[i] == 'null', isEnded: game.is_ended, myTurn: !game.is_ended && isMyTurn, can: turnUser ? o.canPut(turnUser.id == blackUser.id, i) : null, prev: o.prevPos == i }"
+			:class="{ empty: stone == null, none: o.map[i] == 'null', isEnded: game.isEnded, myTurn: !game.isEnded && isMyTurn, can: turnUser ? o.canPut(turnUser.id == blackUser.id, i) : null, prev: o.prevPos == i }"
 			@click="set(i)"
 			:title="'[' + (o.transformPosToXy(i)[0] + 1) + ', ' + (o.transformPosToXy(i)[1] + 1) + '] (' + i + ')'"
 		>
@@ -26,7 +26,7 @@
 
 	<p class="status"><b>{{ logPos }}ターン目</b> 黒:{{ o.blackCount }} 白:{{ o.whiteCount }} 合計:{{ o.blackCount + o.whiteCount }}</p>
 
-	<div class="player" v-if="game.is_ended">
+	<div class="player" v-if="game.isEnded">
 		<el-button-group>
 			<el-button type="primary" @click="logPos = 0" :disabled="logPos == 0">%fa:angle-double-left%</el-button>
 			<el-button type="primary" @click="logPos--" :disabled="logPos == 0">%fa:angle-left%</el-button>
@@ -62,12 +62,12 @@ export default Vue.extend({
 	computed: {
 		iAmPlayer(): boolean {
 			if (!(this as any).os.isSignedIn) return false;
-			return this.game.user1_id == (this as any).os.i.id || this.game.user2_id == (this as any).os.i.id;
+			return this.game.user1Id == (this as any).os.i.id || this.game.user2Id == (this as any).os.i.id;
 		},
 		myColor(): Color {
 			if (!this.iAmPlayer) return null;
-			if (this.game.user1_id == (this as any).os.i.id && this.game.black == 1) return true;
-			if (this.game.user2_id == (this as any).os.i.id && this.game.black == 2) return true;
+			if (this.game.user1Id == (this as any).os.i.id && this.game.black == 1) return true;
+			if (this.game.user2Id == (this as any).os.i.id && this.game.black == 2) return true;
 			return false;
 		},
 		opColor(): Color {
@@ -97,11 +97,11 @@ export default Vue.extend({
 
 	watch: {
 		logPos(v) {
-			if (!this.game.is_ended) return;
+			if (!this.game.isEnded) return;
 			this.o = new Othello(this.game.settings.map, {
-				isLlotheo: this.game.settings.is_llotheo,
-				canPutEverywhere: this.game.settings.can_put_everywhere,
-				loopedBoard: this.game.settings.looped_board
+				isLlotheo: this.game.settings.isLlotheo,
+				canPutEverywhere: this.game.settings.canPutEverywhere,
+				loopedBoard: this.game.settings.loopedBoard
 			});
 			this.logs.forEach((log, i) => {
 				if (i < v) {
@@ -116,9 +116,9 @@ export default Vue.extend({
 		this.game = this.initGame;
 
 		this.o = new Othello(this.game.settings.map, {
-			isLlotheo: this.game.settings.is_llotheo,
-			canPutEverywhere: this.game.settings.can_put_everywhere,
-			loopedBoard: this.game.settings.looped_board
+			isLlotheo: this.game.settings.isLlotheo,
+			canPutEverywhere: this.game.settings.canPutEverywhere,
+			loopedBoard: this.game.settings.loopedBoard
 		});
 
 		this.game.logs.forEach(log => {
@@ -129,7 +129,7 @@ export default Vue.extend({
 		this.logPos = this.logs.length;
 
 		// 通信を取りこぼしてもいいように定期的にポーリングさせる
-		if (this.game.is_started && !this.game.is_ended) {
+		if (this.game.isStarted && !this.game.isEnded) {
 			this.pollingClock = setInterval(() => {
 				const crc32 = CRC32.str(this.logs.map(x => x.pos.toString()).join(''));
 				this.connection.send({
@@ -154,7 +154,7 @@ export default Vue.extend({
 
 	methods: {
 		set(pos) {
-			if (this.game.is_ended) return;
+			if (this.game.isEnded) return;
 			if (!this.iAmPlayer) return;
 			if (!this.isMyTurn) return;
 			if (!this.o.canPut(this.myColor, pos)) return;
@@ -194,16 +194,16 @@ export default Vue.extend({
 		},
 
 		checkEnd() {
-			this.game.is_ended = this.o.isEnded;
-			if (this.game.is_ended) {
+			this.game.isEnded = this.o.isEnded;
+			if (this.game.isEnded) {
 				if (this.o.winner === true) {
-					this.game.winner_id = this.game.black == 1 ? this.game.user1_id : this.game.user2_id;
+					this.game.winnerId = this.game.black == 1 ? this.game.user1Id : this.game.user2Id;
 					this.game.winner = this.game.black == 1 ? this.game.user1 : this.game.user2;
 				} else if (this.o.winner === false) {
-					this.game.winner_id = this.game.black == 1 ? this.game.user2_id : this.game.user1_id;
+					this.game.winnerId = this.game.black == 1 ? this.game.user2Id : this.game.user1Id;
 					this.game.winner = this.game.black == 1 ? this.game.user2 : this.game.user1;
 				} else {
-					this.game.winner_id = null;
+					this.game.winnerId = null;
 					this.game.winner = null;
 				}
 			}
@@ -214,9 +214,9 @@ export default Vue.extend({
 			this.game = game;
 
 			this.o = new Othello(this.game.settings.map, {
-				isLlotheo: this.game.settings.is_llotheo,
-				canPutEverywhere: this.game.settings.can_put_everywhere,
-				loopedBoard: this.game.settings.looped_board
+				isLlotheo: this.game.settings.isLlotheo,
+				canPutEverywhere: this.game.settings.canPutEverywhere,
+				loopedBoard: this.game.settings.loopedBoard
 			});
 
 			this.game.logs.forEach(log => {
diff --git a/src/web/app/common/views/components/othello.gameroom.vue b/src/web/app/common/views/components/othello.gameroom.vue
index 38a25f6686..dba9ccd16d 100644
--- a/src/web/app/common/views/components/othello.gameroom.vue
+++ b/src/web/app/common/views/components/othello.gameroom.vue
@@ -1,6 +1,6 @@
 <template>
 <div>
-	<x-room v-if="!g.is_started" :game="g" :connection="connection"/>
+	<x-room v-if="!g.isStarted" :game="g" :connection="connection"/>
 	<x-game v-else :init-game="g" :connection="connection"/>
 </div>
 </template>
diff --git a/src/web/app/common/views/components/othello.room.vue b/src/web/app/common/views/components/othello.room.vue
index 3965414836..a32be6b74f 100644
--- a/src/web/app/common/views/components/othello.room.vue
+++ b/src/web/app/common/views/components/othello.room.vue
@@ -41,9 +41,9 @@
 			<div slot="header">
 				<span>ルール</span>
 			</div>
-			<mk-switch v-model="game.settings.is_llotheo" @change="updateSettings" text="石の少ない方が勝ち(ロセオ)"/>
-			<mk-switch v-model="game.settings.looped_board" @change="updateSettings" text="ループマップ"/>
-			<mk-switch v-model="game.settings.can_put_everywhere" @change="updateSettings" text="どこでも置けるモード"/>
+			<mk-switch v-model="game.settings.isLlotheo" @change="updateSettings" text="石の少ない方が勝ち(ロセオ)"/>
+			<mk-switch v-model="game.settings.loopedBoard" @change="updateSettings" text="ループマップ"/>
+			<mk-switch v-model="game.settings.canPutEverywhere" @change="updateSettings" text="どこでも置けるモード"/>
 		</el-card>
 
 		<el-card class="bot-form" v-if="form">
@@ -116,13 +116,13 @@ export default Vue.extend({
 			return categories.filter((item, pos) => categories.indexOf(item) == pos);
 		},
 		isAccepted(): boolean {
-			if (this.game.user1_id == (this as any).os.i.id && this.game.user1_accepted) return true;
-			if (this.game.user2_id == (this as any).os.i.id && this.game.user2_accepted) return true;
+			if (this.game.user1Id == (this as any).os.i.id && this.game.user1Accepted) return true;
+			if (this.game.user2Id == (this as any).os.i.id && this.game.user2Accepted) return true;
 			return false;
 		},
 		isOpAccepted(): boolean {
-			if (this.game.user1_id != (this as any).os.i.id && this.game.user1_accepted) return true;
-			if (this.game.user2_id != (this as any).os.i.id && this.game.user2_accepted) return true;
+			if (this.game.user1Id != (this as any).os.i.id && this.game.user1Accepted) return true;
+			if (this.game.user2Id != (this as any).os.i.id && this.game.user2Accepted) return true;
 			return false;
 		}
 	},
@@ -133,8 +133,8 @@ export default Vue.extend({
 		this.connection.on('init-form', this.onInitForm);
 		this.connection.on('message', this.onMessage);
 
-		if (this.game.user1_id != (this as any).os.i.id && this.game.settings.form1) this.form = this.game.settings.form1;
-		if (this.game.user2_id != (this as any).os.i.id && this.game.settings.form2) this.form = this.game.settings.form2;
+		if (this.game.user1Id != (this as any).os.i.id && this.game.settings.form1) this.form = this.game.settings.form1;
+		if (this.game.user2Id != (this as any).os.i.id && this.game.settings.form2) this.form = this.game.settings.form2;
 	},
 
 	beforeDestroy() {
@@ -162,8 +162,8 @@ export default Vue.extend({
 		},
 
 		onChangeAccepts(accepts) {
-			this.game.user1_accepted = accepts.user1;
-			this.game.user2_accepted = accepts.user2;
+			this.game.user1Accepted = accepts.user1;
+			this.game.user2Accepted = accepts.user2;
 			this.$forceUpdate();
 		},
 
@@ -185,12 +185,12 @@ export default Vue.extend({
 		},
 
 		onInitForm(x) {
-			if (x.user_id == (this as any).os.i.id) return;
+			if (x.userId == (this as any).os.i.id) return;
 			this.form = x.form;
 		},
 
 		onMessage(x) {
-			if (x.user_id == (this as any).os.i.id) return;
+			if (x.userId == (this as any).os.i.id) return;
 			this.messages.unshift(x.message);
 		},
 
diff --git a/src/web/app/common/views/components/othello.vue b/src/web/app/common/views/components/othello.vue
index d650322341..7bdb471005 100644
--- a/src/web/app/common/views/components/othello.vue
+++ b/src/web/app/common/views/components/othello.vue
@@ -34,7 +34,7 @@
 				<img :src="`${i.parent.avatar_url}?thumbnail&size=32`" alt="">
 				<span class="name"><b>{{ i.parent.name }}</b></span>
 				<span class="username">@{{ i.parent.username }}</span>
-				<mk-time :time="i.created_at"/>
+				<mk-time :time="i.createdAt"/>
 			</div>
 		</section>
 		<section v-if="myGames.length > 0">
@@ -43,7 +43,7 @@
 				<img :src="`${g.user1.avatar_url}?thumbnail&size=32`" alt="">
 				<img :src="`${g.user2.avatar_url}?thumbnail&size=32`" alt="">
 				<span><b>{{ g.user1.name }}</b> vs <b>{{ g.user2.name }}</b></span>
-				<span class="state">{{ g.is_ended ? '終了' : '進行中' }}</span>
+				<span class="state">{{ g.isEnded ? '終了' : '進行中' }}</span>
 			</a>
 		</section>
 		<section v-if="games.length > 0">
@@ -52,7 +52,7 @@
 				<img :src="`${g.user1.avatar_url}?thumbnail&size=32`" alt="">
 				<img :src="`${g.user2.avatar_url}?thumbnail&size=32`" alt="">
 				<span><b>{{ g.user1.name }}</b> vs <b>{{ g.user2.name }}</b></span>
-				<span class="state">{{ g.is_ended ? '終了' : '進行中' }}</span>
+				<span class="state">{{ g.isEnded ? '終了' : '進行中' }}</span>
 			</a>
 		</section>
 	</div>
@@ -147,7 +147,7 @@ export default Vue.extend({
 					username
 				}).then(user => {
 					(this as any).api('othello/match', {
-						user_id: user.id
+						userId: user.id
 					}).then(res => {
 						if (res == null) {
 							this.matching = user;
@@ -164,7 +164,7 @@ export default Vue.extend({
 		},
 		accept(invitation) {
 			(this as any).api('othello/match', {
-				user_id: invitation.parent.id
+				userId: invitation.parent.id
 			}).then(game => {
 				if (game) {
 					this.matching = null;
diff --git a/src/web/app/common/views/components/poll.vue b/src/web/app/common/views/components/poll.vue
index 8156c8bc58..e46e89f55d 100644
--- a/src/web/app/common/views/components/poll.vue
+++ b/src/web/app/common/views/components/poll.vue
@@ -49,7 +49,7 @@ export default Vue.extend({
 		vote(id) {
 			if (this.poll.choices.some(c => c.is_voted)) return;
 			(this as any).api('posts/polls/vote', {
-				post_id: this.post.id,
+				postId: this.post.id,
 				choice: id
 			}).then(() => {
 				this.poll.choices.forEach(c => {
diff --git a/src/web/app/common/views/components/post-menu.vue b/src/web/app/common/views/components/post-menu.vue
index a53680e55a..35116db7e2 100644
--- a/src/web/app/common/views/components/post-menu.vue
+++ b/src/web/app/common/views/components/post-menu.vue
@@ -2,7 +2,7 @@
 <div class="mk-post-menu">
 	<div class="backdrop" ref="backdrop" @click="close"></div>
 	<div class="popover" :class="{ compact }" ref="popover">
-		<button v-if="post.user_id == os.i.id" @click="pin">%i18n:common.tags.mk-post-menu.pin%</button>
+		<button v-if="post.userId == os.i.id" @click="pin">%i18n:common.tags.mk-post-menu.pin%</button>
 	</div>
 </div>
 </template>
@@ -51,7 +51,7 @@ export default Vue.extend({
 	methods: {
 		pin() {
 			(this as any).api('i/pin', {
-				post_id: this.post.id
+				postId: this.post.id
 			}).then(() => {
 				this.$destroy();
 			});
diff --git a/src/web/app/common/views/components/reaction-picker.vue b/src/web/app/common/views/components/reaction-picker.vue
index df8100f2fc..bcb6b2b965 100644
--- a/src/web/app/common/views/components/reaction-picker.vue
+++ b/src/web/app/common/views/components/reaction-picker.vue
@@ -69,7 +69,7 @@ export default Vue.extend({
 	methods: {
 		react(reaction) {
 			(this as any).api('posts/reactions/create', {
-				post_id: this.post.id,
+				postId: this.post.id,
 				reaction: reaction
 			}).then(() => {
 				if (this.cb) this.cb();
diff --git a/src/web/app/common/views/components/signin.vue b/src/web/app/common/views/components/signin.vue
index 273143262b..17154e6b31 100644
--- a/src/web/app/common/views/components/signin.vue
+++ b/src/web/app/common/views/components/signin.vue
@@ -6,7 +6,7 @@
 	<label class="password">
 		<input v-model="password" type="password" placeholder="%i18n:common.tags.mk-signin.password%" required/>%fa:lock%
 	</label>
-	<label class="token" v-if="user && user.account.two_factor_enabled">
+	<label class="token" v-if="user && user.account.twoFactorEnabled">
 		<input v-model="token" type="number" placeholder="%i18n:common.tags.mk-signin.token%" required/>%fa:lock%
 	</label>
 	<button type="submit" :disabled="signing">{{ signing ? '%i18n:common.tags.mk-signin.signing-in%' : '%i18n:common.tags.mk-signin.signin%' }}</button>
@@ -43,7 +43,7 @@ export default Vue.extend({
 			(this as any).api('signin', {
 				username: this.username,
 				password: this.password,
-				token: this.user && this.user.account.two_factor_enabled ? this.token : undefined
+				token: this.user && this.user.account.twoFactorEnabled ? this.token : undefined
 			}).then(() => {
 				location.reload();
 			}).catch(() => {
diff --git a/src/web/app/common/views/components/twitter-setting.vue b/src/web/app/common/views/components/twitter-setting.vue
index 15968d20a6..082d2b435d 100644
--- a/src/web/app/common/views/components/twitter-setting.vue
+++ b/src/web/app/common/views/components/twitter-setting.vue
@@ -1,13 +1,13 @@
 <template>
 <div class="mk-twitter-setting">
 	<p>%i18n:common.tags.mk-twitter-setting.description%<a :href="`${docsUrl}/link-to-twitter`" target="_blank">%i18n:common.tags.mk-twitter-setting.detail%</a></p>
-	<p class="account" v-if="os.i.account.twitter" :title="`Twitter ID: ${os.i.account.twitter.user_id}`">%i18n:common.tags.mk-twitter-setting.connected-to%: <a :href="`https://twitter.com/${os.i.account.twitter.screen_name}`" target="_blank">@{{ os.i.account.twitter.screen_name }}</a></p>
+	<p class="account" v-if="os.i.account.twitter" :title="`Twitter ID: ${os.i.account.twitter.userId}`">%i18n:common.tags.mk-twitter-setting.connected-to%: <a :href="`https://twitter.com/${os.i.account.twitter.screenName}`" target="_blank">@{{ os.i.account.twitter.screenName }}</a></p>
 	<p>
 		<a :href="`${apiUrl}/connect/twitter`" target="_blank" @click.prevent="connect">{{ os.i.account.twitter ? '%i18n:common.tags.mk-twitter-setting.reconnect%' : '%i18n:common.tags.mk-twitter-setting.connect%' }}</a>
 		<span v-if="os.i.account.twitter"> or </span>
 		<a :href="`${apiUrl}/disconnect/twitter`" target="_blank" v-if="os.i.account.twitter" @click.prevent="disconnect">%i18n:common.tags.mk-twitter-setting.disconnect%</a>
 	</p>
-	<p class="id" v-if="os.i.account.twitter">Twitter ID: {{ os.i.account.twitter.user_id }}</p>
+	<p class="id" v-if="os.i.account.twitter">Twitter ID: {{ os.i.account.twitter.userId }}</p>
 </div>
 </template>
 
diff --git a/src/web/app/common/views/components/uploader.vue b/src/web/app/common/views/components/uploader.vue
index 73006b16e9..c74a1edb41 100644
--- a/src/web/app/common/views/components/uploader.vue
+++ b/src/web/app/common/views/components/uploader.vue
@@ -53,7 +53,7 @@ export default Vue.extend({
 			data.append('i', (this as any).os.i.account.token);
 			data.append('file', file);
 
-			if (folder) data.append('folder_id', folder);
+			if (folder) data.append('folderId', folder);
 
 			const xhr = new XMLHttpRequest();
 			xhr.open('POST', apiUrl + '/drive/files/create', true);
diff --git a/src/web/app/common/views/components/welcome-timeline.vue b/src/web/app/common/views/components/welcome-timeline.vue
index 7586e9264e..c61cae0f76 100644
--- a/src/web/app/common/views/components/welcome-timeline.vue
+++ b/src/web/app/common/views/components/welcome-timeline.vue
@@ -10,7 +10,7 @@
 				<span class="username">@{{ getAcct(post.user) }}</span>
 				<div class="info">
 					<router-link class="created-at" :to="`/@${getAcct(post.user)}/${post.id}`">
-						<mk-time :time="post.created_at"/>
+						<mk-time :time="post.createdAt"/>
 					</router-link>
 				</div>
 			</header>
diff --git a/src/web/app/common/views/widgets/slideshow.vue b/src/web/app/common/views/widgets/slideshow.vue
index e9451663e2..ad32299f37 100644
--- a/src/web/app/common/views/widgets/slideshow.vue
+++ b/src/web/app/common/views/widgets/slideshow.vue
@@ -97,7 +97,7 @@ export default define({
 			this.fetching = true;
 
 			(this as any).api('drive/files', {
-				folder_id: this.props.folder,
+				folderId: this.props.folder,
 				type: 'image/*',
 				limit: 100
 			}).then(images => {
diff --git a/src/web/app/desktop/api/update-avatar.ts b/src/web/app/desktop/api/update-avatar.ts
index 8f748d853c..445ef7d745 100644
--- a/src/web/app/desktop/api/update-avatar.ts
+++ b/src/web/app/desktop/api/update-avatar.ts
@@ -49,7 +49,7 @@ export default (os: OS) => (cb, file = null) => {
 		}).$mount();
 		document.body.appendChild(dialog.$el);
 
-		if (folder) data.append('folder_id', folder.id);
+		if (folder) data.append('folderId', folder.id);
 
 		const xhr = new XMLHttpRequest();
 		xhr.open('POST', apiUrl + '/drive/files/create', true);
@@ -68,9 +68,9 @@ export default (os: OS) => (cb, file = null) => {
 
 	const set = file => {
 		os.api('i/update', {
-			avatar_id: file.id
+			avatarId: file.id
 		}).then(i => {
-			os.i.avatar_id = i.avatar_id;
+			os.i.avatarId = i.avatarId;
 			os.i.avatar_url = i.avatar_url;
 
 			os.apis.dialog({
diff --git a/src/web/app/desktop/api/update-banner.ts b/src/web/app/desktop/api/update-banner.ts
index 9ed48b2670..002efce8ce 100644
--- a/src/web/app/desktop/api/update-banner.ts
+++ b/src/web/app/desktop/api/update-banner.ts
@@ -49,7 +49,7 @@ export default (os: OS) => (cb, file = null) => {
 		}).$mount();
 		document.body.appendChild(dialog.$el);
 
-		if (folder) data.append('folder_id', folder.id);
+		if (folder) data.append('folderId', folder.id);
 
 		const xhr = new XMLHttpRequest();
 		xhr.open('POST', apiUrl + '/drive/files/create', true);
@@ -68,9 +68,9 @@ export default (os: OS) => (cb, file = null) => {
 
 	const set = file => {
 		os.api('i/update', {
-			banner_id: file.id
+			bannerId: file.id
 		}).then(i => {
-			os.i.banner_id = i.banner_id;
+			os.i.bannerId = i.bannerId;
 			os.i.banner_url = i.banner_url;
 
 			os.apis.dialog({
diff --git a/src/web/app/desktop/views/components/activity.vue b/src/web/app/desktop/views/components/activity.vue
index 33b53eb700..480b956ecc 100644
--- a/src/web/app/desktop/views/components/activity.vue
+++ b/src/web/app/desktop/views/components/activity.vue
@@ -43,7 +43,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('aggregation/users/activity', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			limit: 20 * 7
 		}).then(activity => {
 			this.activity = activity;
diff --git a/src/web/app/desktop/views/components/drive.file.vue b/src/web/app/desktop/views/components/drive.file.vue
index 924ff7052d..85f8361c9f 100644
--- a/src/web/app/desktop/views/components/drive.file.vue
+++ b/src/web/app/desktop/views/components/drive.file.vue
@@ -9,10 +9,10 @@
 	@contextmenu.prevent.stop="onContextmenu"
 	:title="title"
 >
-	<div class="label" v-if="os.i.avatar_id == file.id"><img src="/assets/label.svg"/>
+	<div class="label" v-if="os.i.avatarId == file.id"><img src="/assets/label.svg"/>
 		<p>%i18n:desktop.tags.mk-drive-browser-file.avatar%</p>
 	</div>
-	<div class="label" v-if="os.i.banner_id == file.id"><img src="/assets/label.svg"/>
+	<div class="label" v-if="os.i.bannerId == file.id"><img src="/assets/label.svg"/>
 		<p>%i18n:desktop.tags.mk-drive-browser-file.banner%</p>
 	</div>
 	<div class="thumbnail" ref="thumbnail" :style="`background-color: ${ background }`">
@@ -50,8 +50,8 @@ export default Vue.extend({
 			return `${this.file.name}\n${this.file.type} ${Vue.filter('bytes')(this.file.datasize)}`;
 		},
 		background(): string {
-			return this.file.properties.average_color
-				? `rgb(${this.file.properties.average_color.join(',')})`
+			return this.file.properties.avgColor
+				? `rgb(${this.file.properties.avgColor.join(',')})`
 				: 'transparent';
 		}
 	},
@@ -129,10 +129,10 @@ export default Vue.extend({
 		},
 
 		onThumbnailLoaded() {
-			if (this.file.properties.average_color) {
+			if (this.file.properties.avgColor) {
 				anime({
 					targets: this.$refs.thumbnail,
-					backgroundColor: `rgba(${this.file.properties.average_color.join(',')}, 0)`,
+					backgroundColor: `rgba(${this.file.properties.avgColor.join(',')}, 0)`,
 					duration: 100,
 					easing: 'linear'
 				});
@@ -147,7 +147,7 @@ export default Vue.extend({
 				allowEmpty: false
 			}).then(name => {
 				(this as any).api('drive/files/update', {
-					file_id: this.file.id,
+					fileId: this.file.id,
 					name: name
 				})
 			});
diff --git a/src/web/app/desktop/views/components/drive.folder.vue b/src/web/app/desktop/views/components/drive.folder.vue
index a8a9a01370..a926bf47b2 100644
--- a/src/web/app/desktop/views/components/drive.folder.vue
+++ b/src/web/app/desktop/views/components/drive.folder.vue
@@ -135,8 +135,8 @@ export default Vue.extend({
 				const file = JSON.parse(driveFile);
 				this.browser.removeFile(file.id);
 				(this as any).api('drive/files/update', {
-					file_id: file.id,
-					folder_id: this.folder.id
+					fileId: file.id,
+					folderId: this.folder.id
 				});
 			}
 			//#endregion
@@ -151,8 +151,8 @@ export default Vue.extend({
 
 				this.browser.removeFolder(folder.id);
 				(this as any).api('drive/folders/update', {
-					folder_id: folder.id,
-					parent_id: this.folder.id
+					folderId: folder.id,
+					parentId: this.folder.id
 				}).then(() => {
 					// noop
 				}).catch(err => {
@@ -204,7 +204,7 @@ export default Vue.extend({
 				default: this.folder.name
 			}).then(name => {
 				(this as any).api('drive/folders/update', {
-					folder_id: this.folder.id,
+					folderId: this.folder.id,
 					name: name
 				});
 			});
diff --git a/src/web/app/desktop/views/components/drive.nav-folder.vue b/src/web/app/desktop/views/components/drive.nav-folder.vue
index dfbf116bff..d885a72f7f 100644
--- a/src/web/app/desktop/views/components/drive.nav-folder.vue
+++ b/src/web/app/desktop/views/components/drive.nav-folder.vue
@@ -78,8 +78,8 @@ export default Vue.extend({
 				const file = JSON.parse(driveFile);
 				this.browser.removeFile(file.id);
 				(this as any).api('drive/files/update', {
-					file_id: file.id,
-					folder_id: this.folder ? this.folder.id : null
+					fileId: file.id,
+					folderId: this.folder ? this.folder.id : null
 				});
 			}
 			//#endregion
@@ -92,8 +92,8 @@ export default Vue.extend({
 				if (this.folder && folder.id == this.folder.id) return;
 				this.browser.removeFolder(folder.id);
 				(this as any).api('drive/folders/update', {
-					folder_id: folder.id,
-					parent_id: this.folder ? this.folder.id : null
+					folderId: folder.id,
+					parentId: this.folder ? this.folder.id : null
 				});
 			}
 			//#endregion
diff --git a/src/web/app/desktop/views/components/drive.vue b/src/web/app/desktop/views/components/drive.vue
index 0fafa8cf23..c766dfec12 100644
--- a/src/web/app/desktop/views/components/drive.vue
+++ b/src/web/app/desktop/views/components/drive.vue
@@ -160,7 +160,7 @@ export default Vue.extend({
 
 		onStreamDriveFileUpdated(file) {
 			const current = this.folder ? this.folder.id : null;
-			if (current != file.folder_id) {
+			if (current != file.folderId) {
 				this.removeFile(file);
 			} else {
 				this.addFile(file, true);
@@ -173,7 +173,7 @@ export default Vue.extend({
 
 		onStreamDriveFolderUpdated(folder) {
 			const current = this.folder ? this.folder.id : null;
-			if (current != folder.parent_id) {
+			if (current != folder.parentId) {
 				this.removeFolder(folder);
 			} else {
 				this.addFolder(folder, true);
@@ -282,8 +282,8 @@ export default Vue.extend({
 				if (this.files.some(f => f.id == file.id)) return;
 				this.removeFile(file.id);
 				(this as any).api('drive/files/update', {
-					file_id: file.id,
-					folder_id: this.folder ? this.folder.id : null
+					fileId: file.id,
+					folderId: this.folder ? this.folder.id : null
 				});
 			}
 			//#endregion
@@ -298,8 +298,8 @@ export default Vue.extend({
 				if (this.folders.some(f => f.id == folder.id)) return false;
 				this.removeFolder(folder.id);
 				(this as any).api('drive/folders/update', {
-					folder_id: folder.id,
-					parent_id: this.folder ? this.folder.id : null
+					folderId: folder.id,
+					parentId: this.folder ? this.folder.id : null
 				}).then(() => {
 					// noop
 				}).catch(err => {
@@ -332,7 +332,7 @@ export default Vue.extend({
 			}).then(url => {
 				(this as any).api('drive/files/upload_from_url', {
 					url: url,
-					folder_id: this.folder ? this.folder.id : undefined
+					folderId: this.folder ? this.folder.id : undefined
 				});
 
 				(this as any).apis.dialog({
@@ -352,7 +352,7 @@ export default Vue.extend({
 			}).then(name => {
 				(this as any).api('drive/folders/create', {
 					name: name,
-					folder_id: this.folder ? this.folder.id : undefined
+					folderId: this.folder ? this.folder.id : undefined
 				}).then(folder => {
 					this.addFolder(folder, true);
 				});
@@ -412,7 +412,7 @@ export default Vue.extend({
 			this.fetching = true;
 
 			(this as any).api('drive/folders/show', {
-				folder_id: target
+				folderId: target
 			}).then(folder => {
 				this.folder = folder;
 				this.hierarchyFolders = [];
@@ -431,7 +431,7 @@ export default Vue.extend({
 
 		addFolder(folder, unshift = false) {
 			const current = this.folder ? this.folder.id : null;
-			if (current != folder.parent_id) return;
+			if (current != folder.parentId) return;
 
 			if (this.folders.some(f => f.id == folder.id)) {
 				const exist = this.folders.map(f => f.id).indexOf(folder.id);
@@ -448,7 +448,7 @@ export default Vue.extend({
 
 		addFile(file, unshift = false) {
 			const current = this.folder ? this.folder.id : null;
-			if (current != file.folder_id) return;
+			if (current != file.folderId) return;
 
 			if (this.files.some(f => f.id == file.id)) {
 				const exist = this.files.map(f => f.id).indexOf(file.id);
@@ -514,7 +514,7 @@ export default Vue.extend({
 
 			// フォルダ一覧取得
 			(this as any).api('drive/folders', {
-				folder_id: this.folder ? this.folder.id : null,
+				folderId: this.folder ? this.folder.id : null,
 				limit: foldersMax + 1
 			}).then(folders => {
 				if (folders.length == foldersMax + 1) {
@@ -527,7 +527,7 @@ export default Vue.extend({
 
 			// ファイル一覧取得
 			(this as any).api('drive/files', {
-				folder_id: this.folder ? this.folder.id : null,
+				folderId: this.folder ? this.folder.id : null,
 				limit: filesMax + 1
 			}).then(files => {
 				if (files.length == filesMax + 1) {
@@ -557,7 +557,7 @@ export default Vue.extend({
 
 			// ファイル一覧取得
 			(this as any).api('drive/files', {
-				folder_id: this.folder ? this.folder.id : null,
+				folderId: this.folder ? this.folder.id : null,
 				limit: max + 1
 			}).then(files => {
 				if (files.length == max + 1) {
diff --git a/src/web/app/desktop/views/components/follow-button.vue b/src/web/app/desktop/views/components/follow-button.vue
index fc4f871888..01b7e2aefd 100644
--- a/src/web/app/desktop/views/components/follow-button.vue
+++ b/src/web/app/desktop/views/components/follow-button.vue
@@ -67,7 +67,7 @@ export default Vue.extend({
 			this.wait = true;
 			if (this.user.is_following) {
 				(this as any).api('following/delete', {
-					user_id: this.user.id
+					userId: this.user.id
 				}).then(() => {
 					this.user.is_following = false;
 				}).catch(err => {
@@ -77,7 +77,7 @@ export default Vue.extend({
 				});
 			} else {
 				(this as any).api('following/create', {
-					user_id: this.user.id
+					userId: this.user.id
 				}).then(() => {
 					this.user.is_following = true;
 				}).catch(err => {
diff --git a/src/web/app/desktop/views/components/followers.vue b/src/web/app/desktop/views/components/followers.vue
index 4541a00072..e8330289ca 100644
--- a/src/web/app/desktop/views/components/followers.vue
+++ b/src/web/app/desktop/views/components/followers.vue
@@ -1,7 +1,7 @@
 <template>
 <mk-users-list
 	:fetch="fetch"
-	:count="user.followers_count"
+	:count="user.followersCount"
 	:you-know-count="user.followers_you_know_count"
 >
 	フォロワーはいないようです。
@@ -15,7 +15,7 @@ export default Vue.extend({
 	methods: {
 		fetch(iknow, limit, cursor, cb) {
 			(this as any).api('users/followers', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				iknow: iknow,
 				limit: limit,
 				cursor: cursor ? cursor : undefined
diff --git a/src/web/app/desktop/views/components/following.vue b/src/web/app/desktop/views/components/following.vue
index e0b9f11695..0dab6ac7b3 100644
--- a/src/web/app/desktop/views/components/following.vue
+++ b/src/web/app/desktop/views/components/following.vue
@@ -1,7 +1,7 @@
 <template>
 <mk-users-list
 	:fetch="fetch"
-	:count="user.following_count"
+	:count="user.followingCount"
 	:you-know-count="user.following_you_know_count"
 >
 	フォロー中のユーザーはいないようです。
@@ -15,7 +15,7 @@ export default Vue.extend({
 	methods: {
 		fetch(iknow, limit, cursor, cb) {
 			(this as any).api('users/following', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				iknow: iknow,
 				limit: limit,
 				cursor: cursor ? cursor : undefined
diff --git a/src/web/app/desktop/views/components/home.vue b/src/web/app/desktop/views/components/home.vue
index a4ce1ef94b..7145ddce03 100644
--- a/src/web/app/desktop/views/components/home.vue
+++ b/src/web/app/desktop/views/components/home.vue
@@ -53,7 +53,7 @@
 			<div class="main">
 				<a @click="hint">カスタマイズのヒント</a>
 				<div>
-					<mk-post-form v-if="os.i.account.client_settings.showPostFormOnTopOfTl"/>
+					<mk-post-form v-if="os.i.account.clientSettings.showPostFormOnTopOfTl"/>
 					<mk-timeline ref="tl" @loaded="onTlLoaded"/>
 				</div>
 			</div>
@@ -63,7 +63,7 @@
 				<component v-for="widget in widgets[place]" :is="`mkw-${widget.name}`" :key="widget.id" :ref="widget.id" :widget="widget" @chosen="warp"/>
 			</div>
 			<div class="main">
-				<mk-post-form v-if="os.i.account.client_settings.showPostFormOnTopOfTl"/>
+				<mk-post-form v-if="os.i.account.clientSettings.showPostFormOnTopOfTl"/>
 				<mk-timeline ref="tl" @loaded="onTlLoaded" v-if="mode == 'timeline'"/>
 				<mk-mentions @loaded="onTlLoaded" v-if="mode == 'mentions'"/>
 			</div>
@@ -104,16 +104,16 @@ export default Vue.extend({
 		home: {
 			get(): any[] {
 				//#region 互換性のため
-				(this as any).os.i.account.client_settings.home.forEach(w => {
+				(this as any).os.i.account.clientSettings.home.forEach(w => {
 					if (w.name == 'rss-reader') w.name = 'rss';
 					if (w.name == 'user-recommendation') w.name = 'users';
 					if (w.name == 'recommended-polls') w.name = 'polls';
 				});
 				//#endregion
-				return (this as any).os.i.account.client_settings.home;
+				return (this as any).os.i.account.clientSettings.home;
 			},
 			set(value) {
-				(this as any).os.i.account.client_settings.home = value;
+				(this as any).os.i.account.clientSettings.home = value;
 			}
 		},
 		left(): any[] {
@@ -126,7 +126,7 @@ export default Vue.extend({
 	created() {
 		this.widgets.left = this.left;
 		this.widgets.right = this.right;
-		this.$watch('os.i.account.client_settings', i => {
+		this.$watch('os.i.account.clientSettings', i => {
 			this.widgets.left = this.left;
 			this.widgets.right = this.right;
 		}, {
@@ -161,17 +161,17 @@ export default Vue.extend({
 		},
 		onHomeUpdated(data) {
 			if (data.home) {
-				(this as any).os.i.account.client_settings.home = data.home;
+				(this as any).os.i.account.clientSettings.home = data.home;
 				this.widgets.left = data.home.filter(w => w.place == 'left');
 				this.widgets.right = data.home.filter(w => w.place == 'right');
 			} else {
-				const w = (this as any).os.i.account.client_settings.home.find(w => w.id == data.id);
+				const w = (this as any).os.i.account.clientSettings.home.find(w => w.id == data.id);
 				if (w != null) {
 					w.data = data.data;
 					this.$refs[w.id][0].preventSave = true;
 					this.$refs[w.id][0].props = w.data;
-					this.widgets.left = (this as any).os.i.account.client_settings.home.filter(w => w.place == 'left');
-					this.widgets.right = (this as any).os.i.account.client_settings.home.filter(w => w.place == 'right');
+					this.widgets.left = (this as any).os.i.account.clientSettings.home.filter(w => w.place == 'left');
+					this.widgets.right = (this as any).os.i.account.clientSettings.home.filter(w => w.place == 'right');
 				}
 			}
 		},
diff --git a/src/web/app/desktop/views/components/media-image.vue b/src/web/app/desktop/views/components/media-image.vue
index bc02d0f9be..51309a0578 100644
--- a/src/web/app/desktop/views/components/media-image.vue
+++ b/src/web/app/desktop/views/components/media-image.vue
@@ -18,7 +18,7 @@ export default Vue.extend({
 	computed: {
 		style(): any {
 			return {
-				'background-color': this.image.properties.average_color ? `rgb(${this.image.properties.average_color.join(',')})` : 'transparent',
+				'background-color': this.image.properties.avgColor ? `rgb(${this.image.properties.avgColor.join(',')})` : 'transparent',
 				'background-image': `url(${this.image.url}?thumbnail&size=512)`
 			};
 		}
diff --git a/src/web/app/desktop/views/components/notifications.vue b/src/web/app/desktop/views/components/notifications.vue
index b48ffc1746..62593cf97e 100644
--- a/src/web/app/desktop/views/components/notifications.vue
+++ b/src/web/app/desktop/views/components/notifications.vue
@@ -3,7 +3,7 @@
 	<div class="notifications" v-if="notifications.length != 0">
 		<template v-for="(notification, i) in _notifications">
 			<div class="notification" :class="notification.type" :key="notification.id">
-				<mk-time :time="notification.created_at"/>
+				<mk-time :time="notification.createdAt"/>
 				<template v-if="notification.type == 'reaction'">
 					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.user)}`" v-user-preview="notification.user.id">
 						<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
@@ -19,12 +19,12 @@
 					</div>
 				</template>
 				<template v-if="notification.type == 'repost'">
-					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:retweet%
-							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">{{ notification.post.user.name }}</router-link>
 						</p>
 						<router-link class="post-ref" :to="`/@${getAcct(notification.post.user)}/${notification.post.id}`">
 							%fa:quote-left%{{ getPostSummary(notification.post.repost) }}%fa:quote-right%
@@ -32,12 +32,12 @@
 					</div>
 				</template>
 				<template v-if="notification.type == 'quote'">
-					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:quote-left%
-							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">{{ notification.post.user.name }}</router-link>
 						</p>
 						<router-link class="post-preview" :to="`/@${getAcct(notification.post.user)}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</router-link>
 					</div>
@@ -53,23 +53,23 @@
 					</div>
 				</template>
 				<template v-if="notification.type == 'reply'">
-					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:reply%
-							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">{{ notification.post.user.name }}</router-link>
 						</p>
 						<router-link class="post-preview" :to="`/@${getAcct(notification.post.user)}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</router-link>
 					</div>
 				</template>
 				<template v-if="notification.type == 'mention'">
-					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">
+					<router-link class="avatar-anchor" :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">
 						<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=48`" alt="avatar"/>
 					</router-link>
 					<div class="text">
 						<p>%fa:at%
-							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.user_id">{{ notification.post.user.name }}</router-link>
+							<router-link :to="`/@${getAcct(notification.post.user)}`" v-user-preview="notification.post.userId">{{ notification.post.user.name }}</router-link>
 						</p>
 						<a class="post-preview" :href="`/@${getAcct(notification.post.user)}/${notification.post.id}`">{{ getPostSummary(notification.post) }}</a>
 					</div>
@@ -120,8 +120,8 @@ export default Vue.extend({
 	computed: {
 		_notifications(): any[] {
 			return (this.notifications as any).map(notification => {
-				const date = new Date(notification.created_at).getDate();
-				const month = new Date(notification.created_at).getMonth() + 1;
+				const date = new Date(notification.createdAt).getDate();
+				const month = new Date(notification.createdAt).getMonth() + 1;
 				notification._date = date;
 				notification._datetext = `${month}月 ${date}日`;
 				return notification;
diff --git a/src/web/app/desktop/views/components/post-detail.sub.vue b/src/web/app/desktop/views/components/post-detail.sub.vue
index 59d8db04ce..7453a8bfcf 100644
--- a/src/web/app/desktop/views/components/post-detail.sub.vue
+++ b/src/web/app/desktop/views/components/post-detail.sub.vue
@@ -1,17 +1,17 @@
 <template>
 <div class="sub" :title="title">
 	<router-link class="avatar-anchor" :to="`/@${acct}`">
-		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.user_id"/>
+		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.userId"/>
 	</router-link>
 	<div class="main">
 		<header>
 			<div class="left">
-				<router-link class="name" :to="`/@${acct}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
+				<router-link class="name" :to="`/@${acct}`" v-user-preview="post.userId">{{ post.user.name }}</router-link>
 				<span class="username">@{{ acct }}</span>
 			</div>
 			<div class="right">
 				<router-link class="time" :to="`/@${acct}/${post.id}`">
-					<mk-time :time="post.created_at"/>
+					<mk-time :time="post.createdAt"/>
 				</router-link>
 			</div>
 		</header>
@@ -37,7 +37,7 @@ export default Vue.extend({
 			return getAcct(this.post.user);
 		},
 		title(): string {
-			return dateStringify(this.post.created_at);
+			return dateStringify(this.post.createdAt);
 		}
 	}
 });
diff --git a/src/web/app/desktop/views/components/post-detail.vue b/src/web/app/desktop/views/components/post-detail.vue
index f09bf4cbd5..1ab751aaf8 100644
--- a/src/web/app/desktop/views/components/post-detail.vue
+++ b/src/web/app/desktop/views/components/post-detail.vue
@@ -2,7 +2,7 @@
 <div class="mk-post-detail" :title="title">
 	<button
 		class="read-more"
-		v-if="p.reply && p.reply.reply_id && context == null"
+		v-if="p.reply && p.reply.replyId && context == null"
 		title="会話をもっと読み込む"
 		@click="fetchContext"
 		:disabled="contextFetching"
@@ -18,7 +18,7 @@
 	</div>
 	<div class="repost" v-if="isRepost">
 		<p>
-			<router-link class="avatar-anchor" :to="`/@${acct}`" v-user-preview="post.user_id">
+			<router-link class="avatar-anchor" :to="`/@${acct}`" v-user-preview="post.userId">
 				<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=32`" alt="avatar"/>
 			</router-link>
 			%fa:retweet%
@@ -34,7 +34,7 @@
 			<router-link class="name" :to="`/@${acct}`" v-user-preview="p.user.id">{{ p.user.name }}</router-link>
 			<span class="username">@{{ acct }}</span>
 			<router-link class="time" :to="`/@${acct}/${p.id}`">
-				<mk-time :time="p.created_at"/>
+				<mk-time :time="p.createdAt"/>
 			</router-link>
 		</header>
 		<div class="body">
@@ -115,7 +115,7 @@ export default Vue.extend({
 		isRepost(): boolean {
 			return (this.post.repost &&
 				this.post.text == null &&
-				this.post.media_ids == null &&
+				this.post.mediaIds == null &&
 				this.post.poll == null);
 		},
 		p(): any {
@@ -129,7 +129,7 @@ export default Vue.extend({
 				: 0;
 		},
 		title(): string {
-			return dateStringify(this.p.created_at);
+			return dateStringify(this.p.createdAt);
 		},
 		urls(): string[] {
 			if (this.p.ast) {
@@ -145,7 +145,7 @@ export default Vue.extend({
 		// Get replies
 		if (!this.compact) {
 			(this as any).api('posts/replies', {
-				post_id: this.p.id,
+				postId: this.p.id,
 				limit: 8
 			}).then(replies => {
 				this.replies = replies;
@@ -154,7 +154,7 @@ export default Vue.extend({
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.client_settings.showMaps : true;
+			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.clientSettings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.latitude, this.p.geo.longitude);
@@ -176,7 +176,7 @@ export default Vue.extend({
 
 			// Fetch context
 			(this as any).api('posts/context', {
-				post_id: this.p.reply_id
+				postId: this.p.replyId
 			}).then(context => {
 				this.contextFetching = false;
 				this.context = context.reverse();
diff --git a/src/web/app/desktop/views/components/post-form.vue b/src/web/app/desktop/views/components/post-form.vue
index 78f6d445af..11028ceb52 100644
--- a/src/web/app/desktop/views/components/post-form.vue
+++ b/src/web/app/desktop/views/components/post-form.vue
@@ -219,9 +219,9 @@ export default Vue.extend({
 
 			(this as any).api('posts/create', {
 				text: this.text == '' ? undefined : this.text,
-				media_ids: this.files.length > 0 ? this.files.map(f => f.id) : undefined,
-				reply_id: this.reply ? this.reply.id : undefined,
-				repost_id: this.repost ? this.repost.id : undefined,
+				mediaIds: this.files.length > 0 ? this.files.map(f => f.id) : undefined,
+				replyId: this.reply ? this.reply.id : undefined,
+				repostId: this.repost ? this.repost.id : undefined,
 				poll: this.poll ? (this.$refs.poll as any).get() : undefined,
 				geo: this.geo ? {
 					latitude: this.geo.latitude,
@@ -255,7 +255,7 @@ export default Vue.extend({
 			const data = JSON.parse(localStorage.getItem('drafts') || '{}');
 
 			data[this.draftId] = {
-				updated_at: new Date(),
+				updatedAt: new Date(),
 				data: {
 					text: this.text,
 					files: this.files,
diff --git a/src/web/app/desktop/views/components/post-preview.vue b/src/web/app/desktop/views/components/post-preview.vue
index 808220c0e0..450632656d 100644
--- a/src/web/app/desktop/views/components/post-preview.vue
+++ b/src/web/app/desktop/views/components/post-preview.vue
@@ -1,14 +1,14 @@
 <template>
 <div class="mk-post-preview" :title="title">
 	<router-link class="avatar-anchor" :to="`/@${acct}`">
-		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.user_id"/>
+		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.userId"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/@${acct}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${acct}`" v-user-preview="post.userId">{{ post.user.name }}</router-link>
 			<span class="username">@{{ acct }}</span>
 			<router-link class="time" :to="`/@${acct}/${post.id}`">
-				<mk-time :time="post.created_at"/>
+				<mk-time :time="post.createdAt"/>
 			</router-link>
 		</header>
 		<div class="body">
@@ -30,7 +30,7 @@ export default Vue.extend({
 			return getAcct(this.post.user);
 		},
 		title(): string {
-			return dateStringify(this.post.created_at);
+			return dateStringify(this.post.createdAt);
 		}
 	}
 });
diff --git a/src/web/app/desktop/views/components/posts.post.sub.vue b/src/web/app/desktop/views/components/posts.post.sub.vue
index 120700877c..7d2695d6b9 100644
--- a/src/web/app/desktop/views/components/posts.post.sub.vue
+++ b/src/web/app/desktop/views/components/posts.post.sub.vue
@@ -1,14 +1,14 @@
 <template>
 <div class="sub" :title="title">
 	<router-link class="avatar-anchor" :to="`/@${acct}`">
-		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.user_id"/>
+		<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=64`" alt="avatar" v-user-preview="post.userId"/>
 	</router-link>
 	<div class="main">
 		<header>
-			<router-link class="name" :to="`/@${acct}`" v-user-preview="post.user_id">{{ post.user.name }}</router-link>
+			<router-link class="name" :to="`/@${acct}`" v-user-preview="post.userId">{{ post.user.name }}</router-link>
 			<span class="username">@{{ acct }}</span>
 			<router-link class="created-at" :to="`/@${acct}/${post.id}`">
-				<mk-time :time="post.created_at"/>
+				<mk-time :time="post.createdAt"/>
 			</router-link>
 		</header>
 		<div class="body">
@@ -30,7 +30,7 @@ export default Vue.extend({
 			return getAcct(this.post.user);
 		},
 		title(): string {
-			return dateStringify(this.post.created_at);
+			return dateStringify(this.post.createdAt);
 		}
 	}
 });
diff --git a/src/web/app/desktop/views/components/posts.post.vue b/src/web/app/desktop/views/components/posts.post.vue
index 6b4d3d2789..185a621aae 100644
--- a/src/web/app/desktop/views/components/posts.post.vue
+++ b/src/web/app/desktop/views/components/posts.post.vue
@@ -5,15 +5,15 @@
 	</div>
 	<div class="repost" v-if="isRepost">
 		<p>
-			<router-link class="avatar-anchor" :to="`/@${acct}`" v-user-preview="post.user_id">
+			<router-link class="avatar-anchor" :to="`/@${acct}`" v-user-preview="post.userId">
 				<img class="avatar" :src="`${post.user.avatar_url}?thumbnail&size=32`" alt="avatar"/>
 			</router-link>
 			%fa:retweet%
 			<span>{{ '%i18n:desktop.tags.mk-timeline-post.reposted-by%'.substr(0, '%i18n:desktop.tags.mk-timeline-post.reposted-by%'.indexOf('{')) }}</span>
-			<a class="name" :href="`/@${acct}`" v-user-preview="post.user_id">{{ post.user.name }}</a>
+			<a class="name" :href="`/@${acct}`" v-user-preview="post.userId">{{ post.user.name }}</a>
 			<span>{{ '%i18n:desktop.tags.mk-timeline-post.reposted-by%'.substr('%i18n:desktop.tags.mk-timeline-post.reposted-by%'.indexOf('}') + 1) }}</span>
 		</p>
-		<mk-time :time="post.created_at"/>
+		<mk-time :time="post.createdAt"/>
 	</div>
 	<article>
 		<router-link class="avatar-anchor" :to="`/@${acct}`">
@@ -22,13 +22,13 @@
 		<div class="main">
 			<header>
 				<router-link class="name" :to="`/@${acct}`" v-user-preview="p.user.id">{{ acct }}</router-link>
-				<span class="is-bot" v-if="p.user.host === null && p.user.account.is_bot">bot</span>
+				<span class="is-bot" v-if="p.user.host === null && p.user.account.isBot">bot</span>
 				<span class="username">@{{ acct }}</span>
 				<div class="info">
 					<span class="app" v-if="p.app">via <b>{{ p.app.name }}</b></span>
-					<span class="mobile" v-if="p.via_mobile">%fa:mobile-alt%</span>
+					<span class="mobile" v-if="p.viaMobile">%fa:mobile-alt%</span>
 					<router-link class="created-at" :to="url">
-						<mk-time :time="p.created_at"/>
+						<mk-time :time="p.createdAt"/>
 					</router-link>
 				</div>
 			</header>
@@ -122,7 +122,7 @@ export default Vue.extend({
 		isRepost(): boolean {
 			return (this.post.repost &&
 				this.post.text == null &&
-				this.post.media_ids == null &&
+				this.post.mediaIds == null &&
 				this.post.poll == null);
 		},
 		p(): any {
@@ -136,7 +136,7 @@ export default Vue.extend({
 				: 0;
 		},
 		title(): string {
-			return dateStringify(this.p.created_at);
+			return dateStringify(this.p.createdAt);
 		},
 		url(): string {
 			return `/@${this.acct}/${this.p.id}`;
@@ -166,7 +166,7 @@ export default Vue.extend({
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.client_settings.showMaps : true;
+			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.clientSettings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.latitude, this.p.geo.longitude);
@@ -216,7 +216,7 @@ export default Vue.extend({
 			const post = data.post;
 			if (post.id == this.post.id) {
 				this.$emit('update:post', post);
-			} else if (post.id == this.post.repost_id) {
+			} else if (post.id == this.post.repostId) {
 				this.post.repost = post;
 			}
 		},
diff --git a/src/web/app/desktop/views/components/posts.vue b/src/web/app/desktop/views/components/posts.vue
index ffceff8762..5031667c7c 100644
--- a/src/web/app/desktop/views/components/posts.vue
+++ b/src/web/app/desktop/views/components/posts.vue
@@ -30,8 +30,8 @@ export default Vue.extend({
 	computed: {
 		_posts(): any[] {
 			return (this.posts as any).map(post => {
-				const date = new Date(post.created_at).getDate();
-				const month = new Date(post.created_at).getMonth() + 1;
+				const date = new Date(post.createdAt).getDate();
+				const month = new Date(post.createdAt).getMonth() + 1;
 				post._date = date;
 				post._datetext = `${month}月 ${date}日`;
 				return post;
diff --git a/src/web/app/desktop/views/components/repost-form.vue b/src/web/app/desktop/views/components/repost-form.vue
index f2774b817c..3a5e3a7c56 100644
--- a/src/web/app/desktop/views/components/repost-form.vue
+++ b/src/web/app/desktop/views/components/repost-form.vue
@@ -29,7 +29,7 @@ export default Vue.extend({
 		ok() {
 			this.wait = true;
 			(this as any).api('posts/create', {
-				repost_id: this.post.id
+				repostId: this.post.id
 			}).then(data => {
 				this.$emit('posted');
 				(this as any).apis.notify('%i18n:desktop.tags.mk-repost-form.success%');
diff --git a/src/web/app/desktop/views/components/settings.2fa.vue b/src/web/app/desktop/views/components/settings.2fa.vue
index 85f2d6ba5e..b8dd1dfd9b 100644
--- a/src/web/app/desktop/views/components/settings.2fa.vue
+++ b/src/web/app/desktop/views/components/settings.2fa.vue
@@ -2,8 +2,8 @@
 <div class="2fa">
 	<p>%i18n:desktop.tags.mk-2fa-setting.intro%<a href="%i18n:desktop.tags.mk-2fa-setting.url%" target="_blank">%i18n:desktop.tags.mk-2fa-setting.detail%</a></p>
 	<div class="ui info warn"><p>%fa:exclamation-triangle%%i18n:desktop.tags.mk-2fa-setting.caution%</p></div>
-	<p v-if="!data && !os.i.account.two_factor_enabled"><button @click="register" class="ui primary">%i18n:desktop.tags.mk-2fa-setting.register%</button></p>
-	<template v-if="os.i.account.two_factor_enabled">
+	<p v-if="!data && !os.i.account.twoFactorEnabled"><button @click="register" class="ui primary">%i18n:desktop.tags.mk-2fa-setting.register%</button></p>
+	<template v-if="os.i.account.twoFactorEnabled">
 		<p>%i18n:desktop.tags.mk-2fa-setting.already-registered%</p>
 		<button @click="unregister" class="ui">%i18n:desktop.tags.mk-2fa-setting.unregister%</button>
 	</template>
@@ -54,7 +54,7 @@ export default Vue.extend({
 					password: password
 				}).then(() => {
 					(this as any).apis.notify('%i18n:desktop.tags.mk-2fa-setting.unregistered%');
-					(this as any).os.i.account.two_factor_enabled = false;
+					(this as any).os.i.account.twoFactorEnabled = false;
 				});
 			});
 		},
@@ -64,7 +64,7 @@ export default Vue.extend({
 				token: this.token
 			}).then(() => {
 				(this as any).apis.notify('%i18n:desktop.tags.mk-2fa-setting.success%');
-				(this as any).os.i.account.two_factor_enabled = true;
+				(this as any).os.i.account.twoFactorEnabled = true;
 			}).catch(() => {
 				(this as any).apis.notify('%i18n:desktop.tags.mk-2fa-setting.failed%');
 			});
diff --git a/src/web/app/desktop/views/components/settings.profile.vue b/src/web/app/desktop/views/components/settings.profile.vue
index 67a211c792..f34d8ff00d 100644
--- a/src/web/app/desktop/views/components/settings.profile.vue
+++ b/src/web/app/desktop/views/components/settings.profile.vue
@@ -24,7 +24,7 @@
 	<button class="ui primary" @click="save">%i18n:desktop.tags.mk-profile-setting.save%</button>
 	<section>
 		<h2>その他</h2>
-		<mk-switch v-model="os.i.account.is_bot" @change="onChangeIsBot" text="このアカウントはbotです"/>
+		<mk-switch v-model="os.i.account.isBot" @change="onChangeIsBot" text="このアカウントはbotです"/>
 	</section>
 </div>
 </template>
@@ -63,7 +63,7 @@ export default Vue.extend({
 		},
 		onChangeIsBot() {
 			(this as any).api('i/update', {
-				is_bot: (this as any).os.i.account.is_bot
+				isBot: (this as any).os.i.account.isBot
 			});
 		}
 	}
diff --git a/src/web/app/desktop/views/components/settings.signins.vue b/src/web/app/desktop/views/components/settings.signins.vue
index ddc567f06f..a414c95c27 100644
--- a/src/web/app/desktop/views/components/settings.signins.vue
+++ b/src/web/app/desktop/views/components/settings.signins.vue
@@ -6,7 +6,7 @@
 			<template v-if="signin.success">%fa:check%</template>
 			<template v-else>%fa:times%</template>
 			<span class="ip">{{ signin.ip }}</span>
-			<mk-time :time="signin.created_at"/>
+			<mk-time :time="signin.createdAt"/>
 		</header>
 		<div class="headers" v-show="signin._show">
 			<tree-view :data="signin.headers"/>
diff --git a/src/web/app/desktop/views/components/settings.vue b/src/web/app/desktop/views/components/settings.vue
index 3e6a477ced..cf75e52be2 100644
--- a/src/web/app/desktop/views/components/settings.vue
+++ b/src/web/app/desktop/views/components/settings.vue
@@ -20,7 +20,7 @@
 
 		<section class="web" v-show="page == 'web'">
 			<h1>動作</h1>
-			<mk-switch v-model="os.i.account.client_settings.fetchOnScroll" @change="onChangeFetchOnScroll" text="スクロールで自動読み込み">
+			<mk-switch v-model="os.i.account.clientSettings.fetchOnScroll" @change="onChangeFetchOnScroll" text="スクロールで自動読み込み">
 				<span>ページを下までスクロールしたときに自動で追加のコンテンツを読み込みます。</span>
 			</mk-switch>
 			<mk-switch v-model="autoPopout" text="ウィンドウの自動ポップアウト">
@@ -33,11 +33,11 @@
 			<div class="div">
 				<button class="ui button" @click="customizeHome">ホームをカスタマイズ</button>
 			</div>
-			<mk-switch v-model="os.i.account.client_settings.showPostFormOnTopOfTl" @change="onChangeShowPostFormOnTopOfTl" text="タイムライン上部に投稿フォームを表示する"/>
-			<mk-switch v-model="os.i.account.client_settings.showMaps" @change="onChangeShowMaps" text="マップの自動展開">
+			<mk-switch v-model="os.i.account.clientSettings.showPostFormOnTopOfTl" @change="onChangeShowPostFormOnTopOfTl" text="タイムライン上部に投稿フォームを表示する"/>
+			<mk-switch v-model="os.i.account.clientSettings.showMaps" @change="onChangeShowMaps" text="マップの自動展開">
 				<span>位置情報が添付された投稿のマップを自動的に展開します。</span>
 			</mk-switch>
-			<mk-switch v-model="os.i.account.client_settings.gradientWindowHeader" @change="onChangeGradientWindowHeader" text="ウィンドウのタイトルバーにグラデーションを使用"/>
+			<mk-switch v-model="os.i.account.clientSettings.gradientWindowHeader" @change="onChangeGradientWindowHeader" text="ウィンドウのタイトルバーにグラデーションを使用"/>
 		</section>
 
 		<section class="web" v-show="page == 'web'">
@@ -57,7 +57,7 @@
 
 		<section class="web" v-show="page == 'web'">
 			<h1>モバイル</h1>
-			<mk-switch v-model="os.i.account.client_settings.disableViaMobile" @change="onChangeDisableViaMobile" text="「モバイルからの投稿」フラグを付けない"/>
+			<mk-switch v-model="os.i.account.clientSettings.disableViaMobile" @change="onChangeDisableViaMobile" text="「モバイルからの投稿」フラグを付けない"/>
 		</section>
 
 		<section class="web" v-show="page == 'web'">
diff --git a/src/web/app/desktop/views/components/sub-post-content.vue b/src/web/app/desktop/views/components/sub-post-content.vue
index 8c8f42c801..f13822331b 100644
--- a/src/web/app/desktop/views/components/sub-post-content.vue
+++ b/src/web/app/desktop/views/components/sub-post-content.vue
@@ -1,9 +1,9 @@
 <template>
 <div class="mk-sub-post-content">
 	<div class="body">
-		<a class="reply" v-if="post.reply_id">%fa:reply%</a>
+		<a class="reply" v-if="post.replyId">%fa:reply%</a>
 		<mk-post-html :ast="post.ast" :i="os.i"/>
-		<a class="rp" v-if="post.repost_id" :href="`/post:${post.repost_id}`">RP: ...</a>
+		<a class="rp" v-if="post.repostId" :href="`/post:${post.repostId}`">RP: ...</a>
 		<mk-url-preview v-for="url in urls" :url="url" :key="url"/>
 	</div>
 	<details v-if="post.media">
diff --git a/src/web/app/desktop/views/components/timeline.vue b/src/web/app/desktop/views/components/timeline.vue
index 47a9688b6d..c0eae2cd9e 100644
--- a/src/web/app/desktop/views/components/timeline.vue
+++ b/src/web/app/desktop/views/components/timeline.vue
@@ -34,7 +34,7 @@ export default Vue.extend({
 	},
 	computed: {
 		alone(): boolean {
-			return (this as any).os.i.following_count == 0;
+			return (this as any).os.i.followingCount == 0;
 		}
 	},
 	mounted() {
@@ -107,7 +107,7 @@ export default Vue.extend({
 			this.fetch();
 		},
 		onScroll() {
-			if ((this as any).os.i.account.client_settings.fetchOnScroll !== false) {
+			if ((this as any).os.i.account.clientSettings.fetchOnScroll !== false) {
 				const current = window.scrollY + window.innerHeight;
 				if (current > document.body.offsetHeight - 8) this.more();
 			}
diff --git a/src/web/app/desktop/views/components/ui.header.vue b/src/web/app/desktop/views/components/ui.header.vue
index 8af0e2fbed..7e337d2ae5 100644
--- a/src/web/app/desktop/views/components/ui.header.vue
+++ b/src/web/app/desktop/views/components/ui.header.vue
@@ -44,9 +44,9 @@ export default Vue.extend({
 	},
 	mounted() {
 		if ((this as any).os.isSignedIn) {
-			const ago = (new Date().getTime() - new Date((this as any).os.i.account.last_used_at).getTime()) / 1000
+			const ago = (new Date().getTime() - new Date((this as any).os.i.account.lastUsedAt).getTime()) / 1000
 			const isHisasiburi = ago >= 3600;
-			(this as any).os.i.account.last_used_at = new Date();
+			(this as any).os.i.account.lastUsedAt = new Date();
 			if (isHisasiburi) {
 				(this.$refs.welcomeback as any).style.display = 'block';
 				(this.$refs.main as any).style.overflow = 'hidden';
diff --git a/src/web/app/desktop/views/components/user-preview.vue b/src/web/app/desktop/views/components/user-preview.vue
index 24d613f120..4535ad8902 100644
--- a/src/web/app/desktop/views/components/user-preview.vue
+++ b/src/web/app/desktop/views/components/user-preview.vue
@@ -12,13 +12,13 @@
 		<div class="description">{{ u.description }}</div>
 		<div class="status">
 			<div>
-				<p>投稿</p><a>{{ u.posts_count }}</a>
+				<p>投稿</p><a>{{ u.postsCount }}</a>
 			</div>
 			<div>
-				<p>フォロー</p><a>{{ u.following_count }}</a>
+				<p>フォロー</p><a>{{ u.followingCount }}</a>
 			</div>
 			<div>
-				<p>フォロワー</p><a>{{ u.followers_count }}</a>
+				<p>フォロワー</p><a>{{ u.followersCount }}</a>
 			</div>
 		</div>
 		<mk-follow-button v-if="os.isSignedIn && user.id != os.i.id" :user="u"/>
@@ -58,7 +58,7 @@ export default Vue.extend({
 		} else {
 			const query = this.user[0] == '@' ?
 				parseAcct(this.user[0].substr(1)) :
-				{ user_id: this.user[0] };
+				{ userId: this.user[0] };
 
 			(this as any).api('users/show', query).then(user => {
 				this.u = user;
diff --git a/src/web/app/desktop/views/components/widget-container.vue b/src/web/app/desktop/views/components/widget-container.vue
index dd42be63bb..68c5bcb8dc 100644
--- a/src/web/app/desktop/views/components/widget-container.vue
+++ b/src/web/app/desktop/views/components/widget-container.vue
@@ -24,8 +24,8 @@ export default Vue.extend({
 	computed: {
 		withGradient(): boolean {
 			return (this as any).os.isSignedIn
-				? (this as any).os.i.account.client_settings.gradientWindowHeader != null
-					? (this as any).os.i.account.client_settings.gradientWindowHeader
+				? (this as any).os.i.account.clientSettings.gradientWindowHeader != null
+					? (this as any).os.i.account.clientSettings.gradientWindowHeader
 					: false
 				: false;
 		}
diff --git a/src/web/app/desktop/views/components/window.vue b/src/web/app/desktop/views/components/window.vue
index 75f725d4b0..48dc46febd 100644
--- a/src/web/app/desktop/views/components/window.vue
+++ b/src/web/app/desktop/views/components/window.vue
@@ -92,8 +92,8 @@ export default Vue.extend({
 		},
 		withGradient(): boolean {
 			return (this as any).os.isSignedIn
-				? (this as any).os.i.account.client_settings.gradientWindowHeader != null
-					? (this as any).os.i.account.client_settings.gradientWindowHeader
+				? (this as any).os.i.account.clientSettings.gradientWindowHeader != null
+					? (this as any).os.i.account.clientSettings.gradientWindowHeader
 					: false
 				: false;
 		}
diff --git a/src/web/app/desktop/views/pages/home.vue b/src/web/app/desktop/views/pages/home.vue
index e1464bab1d..69e134f79f 100644
--- a/src/web/app/desktop/views/pages/home.vue
+++ b/src/web/app/desktop/views/pages/home.vue
@@ -45,7 +45,7 @@ export default Vue.extend({
 		},
 
 		onStreamPost(post) {
-			if (document.hidden && post.user_id != (this as any).os.i.id) {
+			if (document.hidden && post.userId != (this as any).os.i.id) {
 				this.unreadCount++;
 				document.title = `(${this.unreadCount}) ${getPostSummary(post)}`;
 			}
diff --git a/src/web/app/desktop/views/pages/post.vue b/src/web/app/desktop/views/pages/post.vue
index c7b8729b72..dbd707e049 100644
--- a/src/web/app/desktop/views/pages/post.vue
+++ b/src/web/app/desktop/views/pages/post.vue
@@ -31,7 +31,7 @@ export default Vue.extend({
 			this.fetching = true;
 
 			(this as any).api('posts/show', {
-				post_id: this.$route.params.post
+				postId: this.$route.params.post
 			}).then(post => {
 				this.post = post;
 				this.fetching = false;
diff --git a/src/web/app/desktop/views/pages/user/user.followers-you-know.vue b/src/web/app/desktop/views/pages/user/user.followers-you-know.vue
index 80b38e8acc..9f67f5cf76 100644
--- a/src/web/app/desktop/views/pages/user/user.followers-you-know.vue
+++ b/src/web/app/desktop/views/pages/user/user.followers-you-know.vue
@@ -28,7 +28,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/followers', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			iknow: true,
 			limit: 16
 		}).then(x => {
diff --git a/src/web/app/desktop/views/pages/user/user.friends.vue b/src/web/app/desktop/views/pages/user/user.friends.vue
index 57e6def27b..cc0bcef257 100644
--- a/src/web/app/desktop/views/pages/user/user.friends.vue
+++ b/src/web/app/desktop/views/pages/user/user.friends.vue
@@ -35,7 +35,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/get_frequently_replied_users', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			limit: 4
 		}).then(docs => {
 			this.users = docs.map(doc => doc.user);
diff --git a/src/web/app/desktop/views/pages/user/user.home.vue b/src/web/app/desktop/views/pages/user/user.home.vue
index 2483a6c726..071c9bb61c 100644
--- a/src/web/app/desktop/views/pages/user/user.home.vue
+++ b/src/web/app/desktop/views/pages/user/user.home.vue
@@ -5,16 +5,16 @@
 			<x-profile :user="user"/>
 			<x-photos :user="user"/>
 			<x-followers-you-know v-if="os.isSignedIn && os.i.id != user.id" :user="user"/>
-			<p v-if="user.host === null">%i18n:desktop.tags.mk-user.last-used-at%: <b><mk-time :time="user.account.last_used_at"/></b></p>
+			<p v-if="user.host === null">%i18n:desktop.tags.mk-user.last-used-at%: <b><mk-time :time="user.account.lastUsedAt"/></b></p>
 		</div>
 	</div>
 	<main>
-		<mk-post-detail v-if="user.pinned_post" :post="user.pinned_post" :compact="true"/>
+		<mk-post-detail v-if="user.pinnedPost" :post="user.pinnedPost" :compact="true"/>
 		<x-timeline class="timeline" ref="tl" :user="user"/>
 	</main>
 	<div>
 		<div ref="right">
-			<mk-calendar @chosen="warp" :start="new Date(user.created_at)"/>
+			<mk-calendar @chosen="warp" :start="new Date(user.createdAt)"/>
 			<mk-activity :user="user"/>
 			<x-friends :user="user"/>
 			<div class="nav"><mk-nav/></div>
diff --git a/src/web/app/desktop/views/pages/user/user.photos.vue b/src/web/app/desktop/views/pages/user/user.photos.vue
index db29a9945a..2baf042bc0 100644
--- a/src/web/app/desktop/views/pages/user/user.photos.vue
+++ b/src/web/app/desktop/views/pages/user/user.photos.vue
@@ -23,7 +23,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/posts', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			with_media: true,
 			limit: 9
 		}).then(posts => {
diff --git a/src/web/app/desktop/views/pages/user/user.profile.vue b/src/web/app/desktop/views/pages/user/user.profile.vue
index b51aae18fa..0d91df2a59 100644
--- a/src/web/app/desktop/views/pages/user/user.profile.vue
+++ b/src/web/app/desktop/views/pages/user/user.profile.vue
@@ -11,12 +11,12 @@
 		<p>%fa:birthday-cake%{{ user.account.profile.birthday.replace('-', '年').replace('-', '月') + '日' }} ({{ age }}歳)</p>
 	</div>
 	<div class="twitter" v-if="user.host === null && user.account.twitter">
-		<p>%fa:B twitter%<a :href="`https://twitter.com/${user.account.twitter.screen_name}`" target="_blank">@{{ user.account.twitter.screen_name }}</a></p>
+		<p>%fa:B twitter%<a :href="`https://twitter.com/${user.account.twitter.screenName}`" target="_blank">@{{ user.account.twitter.screenName }}</a></p>
 	</div>
 	<div class="status">
-		<p class="posts-count">%fa:angle-right%<a>{{ user.posts_count }}</a><b>投稿</b></p>
-		<p class="following">%fa:angle-right%<a @click="showFollowing">{{ user.following_count }}</a>人を<b>フォロー</b></p>
-		<p class="followers">%fa:angle-right%<a @click="showFollowers">{{ user.followers_count }}</a>人の<b>フォロワー</b></p>
+		<p class="posts-count">%fa:angle-right%<a>{{ user.postsCount }}</a><b>投稿</b></p>
+		<p class="following">%fa:angle-right%<a @click="showFollowing">{{ user.followingCount }}</a>人を<b>フォロー</b></p>
+		<p class="followers">%fa:angle-right%<a @click="showFollowers">{{ user.followersCount }}</a>人の<b>フォロワー</b></p>
 	</div>
 </div>
 </template>
@@ -49,7 +49,7 @@ export default Vue.extend({
 
 		mute() {
 			(this as any).api('mute/create', {
-				user_id: this.user.id
+				userId: this.user.id
 			}).then(() => {
 				this.user.is_muted = true;
 			}, () => {
@@ -59,7 +59,7 @@ export default Vue.extend({
 
 		unmute() {
 			(this as any).api('mute/delete', {
-				user_id: this.user.id
+				userId: this.user.id
 			}).then(() => {
 				this.user.is_muted = false;
 			}, () => {
diff --git a/src/web/app/desktop/views/pages/user/user.timeline.vue b/src/web/app/desktop/views/pages/user/user.timeline.vue
index 60eef8951b..1f0d0b1985 100644
--- a/src/web/app/desktop/views/pages/user/user.timeline.vue
+++ b/src/web/app/desktop/views/pages/user/user.timeline.vue
@@ -61,7 +61,7 @@ export default Vue.extend({
 		},
 		fetch(cb?) {
 			(this as any).api('users/posts', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				until_date: this.date ? this.date.getTime() : undefined,
 				with_replies: this.mode == 'with-replies'
 			}).then(posts => {
@@ -74,7 +74,7 @@ export default Vue.extend({
 			if (this.moreFetching || this.fetching || this.posts.length == 0) return;
 			this.moreFetching = true;
 			(this as any).api('users/posts', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				with_replies: this.mode == 'with-replies',
 				until_id: this.posts[this.posts.length - 1].id
 			}).then(posts => {
diff --git a/src/web/app/desktop/views/widgets/channel.channel.form.vue b/src/web/app/desktop/views/widgets/channel.channel.form.vue
index 392ba5924b..aaf327f1ef 100644
--- a/src/web/app/desktop/views/widgets/channel.channel.form.vue
+++ b/src/web/app/desktop/views/widgets/channel.channel.form.vue
@@ -30,8 +30,8 @@ export default Vue.extend({
 
 			(this as any).api('posts/create', {
 				text: this.text,
-				reply_id: reply ? reply.id : undefined,
-				channel_id: (this.$parent as any).channel.id
+				replyId: reply ? reply.id : undefined,
+				channelId: (this.$parent as any).channel.id
 			}).then(data => {
 				this.text = '';
 			}).catch(err => {
diff --git a/src/web/app/desktop/views/widgets/channel.channel.vue b/src/web/app/desktop/views/widgets/channel.channel.vue
index de5885bfc1..e9fb9e3fd7 100644
--- a/src/web/app/desktop/views/widgets/channel.channel.vue
+++ b/src/web/app/desktop/views/widgets/channel.channel.vue
@@ -44,7 +44,7 @@ export default Vue.extend({
 			this.fetching = true;
 
 			(this as any).api('channels/posts', {
-				channel_id: this.channel.id
+				channelId: this.channel.id
 			}).then(posts => {
 				this.posts = posts;
 				this.fetching = false;
diff --git a/src/web/app/desktop/views/widgets/channel.vue b/src/web/app/desktop/views/widgets/channel.vue
index fc143bb1df..c9b62dfeab 100644
--- a/src/web/app/desktop/views/widgets/channel.vue
+++ b/src/web/app/desktop/views/widgets/channel.vue
@@ -48,7 +48,7 @@ export default define({
 			this.fetching = true;
 
 			(this as any).api('channels/show', {
-				channel_id: this.props.channel
+				channelId: this.props.channel
 			}).then(channel => {
 				this.channel = channel;
 				this.fetching = false;
diff --git a/src/web/app/dev/views/app.vue b/src/web/app/dev/views/app.vue
index 2c2a3c83ce..a35b032b73 100644
--- a/src/web/app/dev/views/app.vue
+++ b/src/web/app/dev/views/app.vue
@@ -28,7 +28,7 @@ export default Vue.extend({
 		fetch() {
 			this.fetching = true;
 			(this as any).api('app/show', {
-				app_id: this.$route.params.id
+				appId: this.$route.params.id
 			}).then(app => {
 				this.app = app;
 				this.fetching = false;
diff --git a/src/web/app/dev/views/new-app.vue b/src/web/app/dev/views/new-app.vue
index 1a796299cb..cd07cc4d49 100644
--- a/src/web/app/dev/views/new-app.vue
+++ b/src/web/app/dev/views/new-app.vue
@@ -77,8 +77,8 @@ export default Vue.extend({
 
 			this.nidState = 'wait';
 
-			(this as any).api('app/name_id/available', {
-				name_id: this.nid
+			(this as any).api('app/nameId/available', {
+				nameId: this.nid
 			}).then(result => {
 				this.nidState = result.available ? 'ok' : 'unavailable';
 			}).catch(err => {
@@ -90,7 +90,7 @@ export default Vue.extend({
 		onSubmit() {
 			(this as any).api('app/create', {
 				name: this.name,
-				name_id: this.nid,
+				nameId: this.nid,
 				description: this.description,
 				callback_url: this.cb,
 				permission: this.permission
diff --git a/src/web/app/mobile/api/post.ts b/src/web/app/mobile/api/post.ts
index 9b78ce10c2..841103fee1 100644
--- a/src/web/app/mobile/api/post.ts
+++ b/src/web/app/mobile/api/post.ts
@@ -18,7 +18,7 @@ export default (os) => (opts) => {
 		const text = window.prompt(`「${getPostSummary(o.repost)}」をRepost`);
 		if (text == null) return;
 		os.api('posts/create', {
-			repost_id: o.repost.id,
+			repostId: o.repost.id,
 			text: text == '' ? undefined : text
 		});
 	} else {
diff --git a/src/web/app/mobile/views/components/activity.vue b/src/web/app/mobile/views/components/activity.vue
index b50044b3de..2e44017e77 100644
--- a/src/web/app/mobile/views/components/activity.vue
+++ b/src/web/app/mobile/views/components/activity.vue
@@ -29,7 +29,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('aggregation/users/activity', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			limit: 30
 		}).then(data => {
 			data.forEach(d => d.total = d.posts + d.replies + d.reposts);
diff --git a/src/web/app/mobile/views/components/drive.file-detail.vue b/src/web/app/mobile/views/components/drive.file-detail.vue
index e41ebbb451..f3274f677f 100644
--- a/src/web/app/mobile/views/components/drive.file-detail.vue
+++ b/src/web/app/mobile/views/components/drive.file-detail.vue
@@ -29,7 +29,7 @@
 			<span class="separator"></span>
 			<span class="data-size">{{ file.datasize | bytes }}</span>
 			<span class="separator"></span>
-			<span class="created-at" @click="showCreatedAt">%fa:R clock%<mk-time :time="file.created_at"/></span>
+			<span class="created-at" @click="showCreatedAt">%fa:R clock%<mk-time :time="file.createdAt"/></span>
 		</div>
 	</div>
 	<div class="menu">
@@ -86,8 +86,8 @@ export default Vue.extend({
 			return this.file.type.split('/')[0];
 		},
 		style(): any {
-			return this.file.properties.average_color ? {
-				'background-color': `rgb(${ this.file.properties.average_color.join(',') })`
+			return this.file.properties.avgColor ? {
+				'background-color': `rgb(${ this.file.properties.avgColor.join(',') })`
 			} : {};
 		}
 	},
@@ -96,7 +96,7 @@ export default Vue.extend({
 			const name = window.prompt('名前を変更', this.file.name);
 			if (name == null || name == '' || name == this.file.name) return;
 			(this as any).api('drive/files/update', {
-				file_id: this.file.id,
+				fileId: this.file.id,
 				name: name
 			}).then(() => {
 				this.browser.cf(this.file, true);
@@ -105,15 +105,15 @@ export default Vue.extend({
 		move() {
 			(this as any).apis.chooseDriveFolder().then(folder => {
 				(this as any).api('drive/files/update', {
-					file_id: this.file.id,
-					folder_id: folder == null ? null : folder.id
+					fileId: this.file.id,
+					folderId: folder == null ? null : folder.id
 				}).then(() => {
 					this.browser.cf(this.file, true);
 				});
 			});
 		},
 		showCreatedAt() {
-			alert(new Date(this.file.created_at).toLocaleString());
+			alert(new Date(this.file.createdAt).toLocaleString());
 		},
 		onImageLoaded() {
 			const self = this;
diff --git a/src/web/app/mobile/views/components/drive.file.vue b/src/web/app/mobile/views/components/drive.file.vue
index db73816282..7d1957042b 100644
--- a/src/web/app/mobile/views/components/drive.file.vue
+++ b/src/web/app/mobile/views/components/drive.file.vue
@@ -19,7 +19,7 @@
 				<p class="data-size">{{ file.datasize | bytes }}</p>
 				<p class="separator"></p>
 				<p class="created-at">
-					%fa:R clock%<mk-time :time="file.created_at"/>
+					%fa:R clock%<mk-time :time="file.createdAt"/>
 				</p>
 			</footer>
 		</div>
@@ -42,7 +42,7 @@ export default Vue.extend({
 		},
 		thumbnail(): any {
 			return {
-				'background-color': this.file.properties.average_color ? `rgb(${this.file.properties.average_color.join(',')})` : 'transparent',
+				'background-color': this.file.properties.avgColor ? `rgb(${this.file.properties.avgColor.join(',')})` : 'transparent',
 				'background-image': `url(${this.file.url}?thumbnail&size=128)`
 			};
 		}
diff --git a/src/web/app/mobile/views/components/drive.vue b/src/web/app/mobile/views/components/drive.vue
index 696c63e2a4..dd4d97e960 100644
--- a/src/web/app/mobile/views/components/drive.vue
+++ b/src/web/app/mobile/views/components/drive.vue
@@ -129,7 +129,7 @@ export default Vue.extend({
 
 		onStreamDriveFileUpdated(file) {
 			const current = this.folder ? this.folder.id : null;
-			if (current != file.folder_id) {
+			if (current != file.folderId) {
 				this.removeFile(file);
 			} else {
 				this.addFile(file, true);
@@ -142,7 +142,7 @@ export default Vue.extend({
 
 		onStreamDriveFolderUpdated(folder) {
 			const current = this.folder ? this.folder.id : null;
-			if (current != folder.parent_id) {
+			if (current != folder.parentId) {
 				this.removeFolder(folder);
 			} else {
 				this.addFolder(folder, true);
@@ -167,7 +167,7 @@ export default Vue.extend({
 			this.fetching = true;
 
 			(this as any).api('drive/folders/show', {
-				folder_id: target
+				folderId: target
 			}).then(folder => {
 				this.folder = folder;
 				this.hierarchyFolders = [];
@@ -182,7 +182,7 @@ export default Vue.extend({
 		addFolder(folder, unshift = false) {
 			const current = this.folder ? this.folder.id : null;
 			// 追加しようとしているフォルダが、今居る階層とは違う階層のものだったら中断
-			if (current != folder.parent_id) return;
+			if (current != folder.parentId) return;
 
 			// 追加しようとしているフォルダを既に所有してたら中断
 			if (this.folders.some(f => f.id == folder.id)) return;
@@ -197,7 +197,7 @@ export default Vue.extend({
 		addFile(file, unshift = false) {
 			const current = this.folder ? this.folder.id : null;
 			// 追加しようとしているファイルが、今居る階層とは違う階層のものだったら中断
-			if (current != file.folder_id) return;
+			if (current != file.folderId) return;
 
 			if (this.files.some(f => f.id == file.id)) {
 				const exist = this.files.map(f => f.id).indexOf(file.id);
@@ -262,7 +262,7 @@ export default Vue.extend({
 
 			// フォルダ一覧取得
 			(this as any).api('drive/folders', {
-				folder_id: this.folder ? this.folder.id : null,
+				folderId: this.folder ? this.folder.id : null,
 				limit: foldersMax + 1
 			}).then(folders => {
 				if (folders.length == foldersMax + 1) {
@@ -275,7 +275,7 @@ export default Vue.extend({
 
 			// ファイル一覧取得
 			(this as any).api('drive/files', {
-				folder_id: this.folder ? this.folder.id : null,
+				folderId: this.folder ? this.folder.id : null,
 				limit: filesMax + 1
 			}).then(files => {
 				if (files.length == filesMax + 1) {
@@ -318,7 +318,7 @@ export default Vue.extend({
 
 			// ファイル一覧取得
 			(this as any).api('drive/files', {
-				folder_id: this.folder ? this.folder.id : null,
+				folderId: this.folder ? this.folder.id : null,
 				limit: max + 1,
 				until_id: this.files[this.files.length - 1].id
 			}).then(files => {
@@ -357,7 +357,7 @@ export default Vue.extend({
 			this.fetching = true;
 
 			(this as any).api('drive/files/show', {
-				file_id: file
+				fileId: file
 			}).then(file => {
 				this.file = file;
 				this.folder = null;
@@ -405,7 +405,7 @@ export default Vue.extend({
 			if (name == null || name == '') return;
 			(this as any).api('drive/folders/create', {
 				name: name,
-				parent_id: this.folder ? this.folder.id : undefined
+				parentId: this.folder ? this.folder.id : undefined
 			}).then(folder => {
 				this.addFolder(folder, true);
 			});
@@ -420,7 +420,7 @@ export default Vue.extend({
 			if (name == null || name == '') return;
 			(this as any).api('drive/folders/update', {
 				name: name,
-				folder_id: this.folder.id
+				folderId: this.folder.id
 			}).then(folder => {
 				this.cd(folder);
 			});
@@ -433,8 +433,8 @@ export default Vue.extend({
 			}
 			(this as any).apis.chooseDriveFolder().then(folder => {
 				(this as any).api('drive/folders/update', {
-					parent_id: folder ? folder.id : null,
-					folder_id: this.folder.id
+					parentId: folder ? folder.id : null,
+					folderId: this.folder.id
 				}).then(folder => {
 					this.cd(folder);
 				});
@@ -446,7 +446,7 @@ export default Vue.extend({
 			if (url == null || url == '') return;
 			(this as any).api('drive/files/upload_from_url', {
 				url: url,
-				folder_id: this.folder ? this.folder.id : undefined
+				folderId: this.folder ? this.folder.id : undefined
 			});
 			alert('アップロードをリクエストしました。アップロードが完了するまで時間がかかる場合があります。');
 		},
diff --git a/src/web/app/mobile/views/components/follow-button.vue b/src/web/app/mobile/views/components/follow-button.vue
index fb6eaa39c6..838ea404eb 100644
--- a/src/web/app/mobile/views/components/follow-button.vue
+++ b/src/web/app/mobile/views/components/follow-button.vue
@@ -57,7 +57,7 @@ export default Vue.extend({
 			this.wait = true;
 			if (this.user.is_following) {
 				(this as any).api('following/delete', {
-					user_id: this.user.id
+					userId: this.user.id
 				}).then(() => {
 					this.user.is_following = false;
 				}).catch(err => {
@@ -67,7 +67,7 @@ export default Vue.extend({
 				});
 			} else {
 				(this as any).api('following/create', {
-					user_id: this.user.id
+					userId: this.user.id
 				}).then(() => {
 					this.user.is_following = true;
 				}).catch(err => {
diff --git a/src/web/app/mobile/views/components/media-image.vue b/src/web/app/mobile/views/components/media-image.vue
index faf8bad48a..cfc2134988 100644
--- a/src/web/app/mobile/views/components/media-image.vue
+++ b/src/web/app/mobile/views/components/media-image.vue
@@ -10,7 +10,7 @@ export default Vue.extend({
 	computed: {
 		style(): any {
 			return {
-				'background-color': this.image.properties.average_color ? `rgb(${this.image.properties.average_color.join(',')})` : 'transparent',
+				'background-color': this.image.properties.avgColor ? `rgb(${this.image.properties.avgColor.join(',')})` : 'transparent',
 				'background-image': `url(${this.image.url}?thumbnail&size=512)`
 			};
 		}
diff --git a/src/web/app/mobile/views/components/notification.vue b/src/web/app/mobile/views/components/notification.vue
index 150ac0fd8b..aac8f82900 100644
--- a/src/web/app/mobile/views/components/notification.vue
+++ b/src/web/app/mobile/views/components/notification.vue
@@ -1,7 +1,7 @@
 <template>
 <div class="mk-notification">
 	<div class="notification reaction" v-if="notification.type == 'reaction'">
-		<mk-time :time="notification.created_at"/>
+		<mk-time :time="notification.createdAt"/>
 		<router-link class="avatar-anchor" :to="`/@${acct}`">
 			<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
@@ -18,7 +18,7 @@
 	</div>
 
 	<div class="notification repost" v-if="notification.type == 'repost'">
-		<mk-time :time="notification.created_at"/>
+		<mk-time :time="notification.createdAt"/>
 		<router-link class="avatar-anchor" :to="`/@${acct}`">
 			<img class="avatar" :src="`${notification.post.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
@@ -38,7 +38,7 @@
 	</template>
 
 	<div class="notification follow" v-if="notification.type == 'follow'">
-		<mk-time :time="notification.created_at"/>
+		<mk-time :time="notification.createdAt"/>
 		<router-link class="avatar-anchor" :to="`/@${acct}`">
 			<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
@@ -59,7 +59,7 @@
 	</template>
 
 	<div class="notification poll_vote" v-if="notification.type == 'poll_vote'">
-		<mk-time :time="notification.created_at"/>
+		<mk-time :time="notification.createdAt"/>
 		<router-link class="avatar-anchor" :to="`/@${acct}`">
 			<img class="avatar" :src="`${notification.user.avatar_url}?thumbnail&size=64`" alt="avatar"/>
 		</router-link>
diff --git a/src/web/app/mobile/views/components/notifications.vue b/src/web/app/mobile/views/components/notifications.vue
index 1cd6e2bc13..4365198f16 100644
--- a/src/web/app/mobile/views/components/notifications.vue
+++ b/src/web/app/mobile/views/components/notifications.vue
@@ -34,8 +34,8 @@ export default Vue.extend({
 	computed: {
 		_notifications(): any[] {
 			return (this.notifications as any).map(notification => {
-				const date = new Date(notification.created_at).getDate();
-				const month = new Date(notification.created_at).getMonth() + 1;
+				const date = new Date(notification.createdAt).getDate();
+				const month = new Date(notification.createdAt).getMonth() + 1;
 				notification._date = date;
 				notification._datetext = `${month}月 ${date}日`;
 				return notification;
diff --git a/src/web/app/mobile/views/components/post-card.vue b/src/web/app/mobile/views/components/post-card.vue
index 8ca7550c2e..10dfd92415 100644
--- a/src/web/app/mobile/views/components/post-card.vue
+++ b/src/web/app/mobile/views/components/post-card.vue
@@ -7,7 +7,7 @@
 		<div>
 			{{ text }}
 		</div>
-		<mk-time :time="post.created_at"/>
+		<mk-time :time="post.createdAt"/>
 	</a>
 </div>
 </template>
diff --git a/src/web/app/mobile/views/components/post-detail.sub.vue b/src/web/app/mobile/views/components/post-detail.sub.vue
index 6906cf570e..427e054fd6 100644
--- a/src/web/app/mobile/views/components/post-detail.sub.vue
+++ b/src/web/app/mobile/views/components/post-detail.sub.vue
@@ -8,7 +8,7 @@
 			<router-link class="name" :to="`/@${acct}`">{{ post.user.name }}</router-link>
 			<span class="username">@{{ acct }}</span>
 			<router-link class="time" :to="`/@${acct}/${post.id}`">
-				<mk-time :time="post.created_at"/>
+				<mk-time :time="post.createdAt"/>
 			</router-link>
 		</header>
 		<div class="body">
diff --git a/src/web/app/mobile/views/components/post-detail.vue b/src/web/app/mobile/views/components/post-detail.vue
index b5c9158300..9a8c33a80d 100644
--- a/src/web/app/mobile/views/components/post-detail.vue
+++ b/src/web/app/mobile/views/components/post-detail.vue
@@ -2,7 +2,7 @@
 <div class="mk-post-detail">
 	<button
 		class="more"
-		v-if="p.reply && p.reply.reply_id && context == null"
+		v-if="p.reply && p.reply.replyId && context == null"
 		@click="fetchContext"
 		:disabled="fetchingContext"
 	>
@@ -54,7 +54,7 @@
 			</div>
 		</div>
 		<router-link class="time" :to="`/@${pAcct}/${p.id}`">
-			<mk-time :time="p.created_at" mode="detail"/>
+			<mk-time :time="p.createdAt" mode="detail"/>
 		</router-link>
 		<footer>
 			<mk-reactions-viewer :post="p"/>
@@ -115,7 +115,7 @@ export default Vue.extend({
 		isRepost(): boolean {
 			return (this.post.repost &&
 				this.post.text == null &&
-				this.post.media_ids == null &&
+				this.post.mediaIds == null &&
 				this.post.poll == null);
 		},
 		p(): any {
@@ -142,7 +142,7 @@ export default Vue.extend({
 		// Get replies
 		if (!this.compact) {
 			(this as any).api('posts/replies', {
-				post_id: this.p.id,
+				postId: this.p.id,
 				limit: 8
 			}).then(replies => {
 				this.replies = replies;
@@ -151,7 +151,7 @@ export default Vue.extend({
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.client_settings.showMaps : true;
+			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.clientSettings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.latitude, this.p.geo.longitude);
@@ -173,7 +173,7 @@ export default Vue.extend({
 
 			// Fetch context
 			(this as any).api('posts/context', {
-				post_id: this.p.reply_id
+				postId: this.p.replyId
 			}).then(context => {
 				this.contextFetching = false;
 				this.context = context.reverse();
diff --git a/src/web/app/mobile/views/components/post-form.vue b/src/web/app/mobile/views/components/post-form.vue
index 2aa3c6f6c0..929dc5933b 100644
--- a/src/web/app/mobile/views/components/post-form.vue
+++ b/src/web/app/mobile/views/components/post-form.vue
@@ -111,11 +111,11 @@ export default Vue.extend({
 		},
 		post() {
 			this.posting = true;
-			const viaMobile = (this as any).os.i.account.client_settings.disableViaMobile !== true;
+			const viaMobile = (this as any).os.i.account.clientSettings.disableViaMobile !== true;
 			(this as any).api('posts/create', {
 				text: this.text == '' ? undefined : this.text,
-				media_ids: this.files.length > 0 ? this.files.map(f => f.id) : undefined,
-				reply_id: this.reply ? this.reply.id : undefined,
+				mediaIds: this.files.length > 0 ? this.files.map(f => f.id) : undefined,
+				replyId: this.reply ? this.reply.id : undefined,
 				poll: this.poll ? (this.$refs.poll as any).get() : undefined,
 				geo: this.geo ? {
 					latitude: this.geo.latitude,
@@ -126,7 +126,7 @@ export default Vue.extend({
 					heading: isNaN(this.geo.heading) ? null : this.geo.heading,
 					speed: this.geo.speed,
 				} : null,
-				via_mobile: viaMobile
+				viaMobile: viaMobile
 			}).then(data => {
 				this.$emit('post');
 				this.$destroy();
diff --git a/src/web/app/mobile/views/components/post-preview.vue b/src/web/app/mobile/views/components/post-preview.vue
index 0bd0a355b3..e640843419 100644
--- a/src/web/app/mobile/views/components/post-preview.vue
+++ b/src/web/app/mobile/views/components/post-preview.vue
@@ -8,7 +8,7 @@
 			<router-link class="name" :to="`/@${acct}`">{{ post.user.name }}</router-link>
 			<span class="username">@{{ acct }}</span>
 			<router-link class="time" :to="`/@${acct}/${post.id}`">
-				<mk-time :time="post.created_at"/>
+				<mk-time :time="post.createdAt"/>
 			</router-link>
 		</header>
 		<div class="body">
diff --git a/src/web/app/mobile/views/components/post.sub.vue b/src/web/app/mobile/views/components/post.sub.vue
index b6ee7c1e08..8a11239da7 100644
--- a/src/web/app/mobile/views/components/post.sub.vue
+++ b/src/web/app/mobile/views/components/post.sub.vue
@@ -8,7 +8,7 @@
 			<router-link class="name" :to="`/@${acct}`">{{ post.user.name }}</router-link>
 			<span class="username">@{{ acct }}</span>
 			<router-link class="created-at" :to="`/@${acct}/${post.id}`">
-				<mk-time :time="post.created_at"/>
+				<mk-time :time="post.createdAt"/>
 			</router-link>
 		</header>
 		<div class="body">
diff --git a/src/web/app/mobile/views/components/post.vue b/src/web/app/mobile/views/components/post.vue
index e5bc964792..243e7d9c2e 100644
--- a/src/web/app/mobile/views/components/post.vue
+++ b/src/web/app/mobile/views/components/post.vue
@@ -13,7 +13,7 @@
 			<router-link class="name" :to="`/@${acct}`">{{ post.user.name }}</router-link>
 			<span>{{ '%i18n:mobile.tags.mk-timeline-post.reposted-by%'.substr('%i18n:mobile.tags.mk-timeline-post.reposted-by%'.indexOf('}') + 1) }}</span>
 		</p>
-		<mk-time :time="post.created_at"/>
+		<mk-time :time="post.createdAt"/>
 	</div>
 	<article>
 		<router-link class="avatar-anchor" :to="`/@${pAcct}`">
@@ -22,12 +22,12 @@
 		<div class="main">
 			<header>
 				<router-link class="name" :to="`/@${pAcct}`">{{ p.user.name }}</router-link>
-				<span class="is-bot" v-if="p.user.host === null && p.user.account.is_bot">bot</span>
+				<span class="is-bot" v-if="p.user.host === null && p.user.account.isBot">bot</span>
 				<span class="username">@{{ pAcct }}</span>
 				<div class="info">
-					<span class="mobile" v-if="p.via_mobile">%fa:mobile-alt%</span>
+					<span class="mobile" v-if="p.viaMobile">%fa:mobile-alt%</span>
 					<router-link class="created-at" :to="url">
-						<mk-time :time="p.created_at"/>
+						<mk-time :time="p.createdAt"/>
 					</router-link>
 				</div>
 			</header>
@@ -103,7 +103,7 @@ export default Vue.extend({
 		isRepost(): boolean {
 			return (this.post.repost &&
 				this.post.text == null &&
-				this.post.media_ids == null &&
+				this.post.mediaIds == null &&
 				this.post.poll == null);
 		},
 		p(): any {
@@ -144,7 +144,7 @@ export default Vue.extend({
 
 		// Draw map
 		if (this.p.geo) {
-			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.client_settings.showMaps : true;
+			const shouldShowMap = (this as any).os.isSignedIn ? (this as any).os.i.account.clientSettings.showMaps : true;
 			if (shouldShowMap) {
 				(this as any).os.getGoogleMaps().then(maps => {
 					const uluru = new maps.LatLng(this.p.geo.latitude, this.p.geo.longitude);
@@ -194,7 +194,7 @@ export default Vue.extend({
 			const post = data.post;
 			if (post.id == this.post.id) {
 				this.$emit('update:post', post);
-			} else if (post.id == this.post.repost_id) {
+			} else if (post.id == this.post.repostId) {
 				this.post.repost = post;
 			}
 		},
diff --git a/src/web/app/mobile/views/components/posts.vue b/src/web/app/mobile/views/components/posts.vue
index 7e71fa0982..4695f1beaa 100644
--- a/src/web/app/mobile/views/components/posts.vue
+++ b/src/web/app/mobile/views/components/posts.vue
@@ -28,8 +28,8 @@ export default Vue.extend({
 	computed: {
 		_posts(): any[] {
 			return (this.posts as any).map(post => {
-				const date = new Date(post.created_at).getDate();
-				const month = new Date(post.created_at).getMonth() + 1;
+				const date = new Date(post.createdAt).getDate();
+				const month = new Date(post.createdAt).getMonth() + 1;
 				post._date = date;
 				post._datetext = `${month}月 ${date}日`;
 				return post;
diff --git a/src/web/app/mobile/views/components/sub-post-content.vue b/src/web/app/mobile/views/components/sub-post-content.vue
index 389fc420ea..b95883de77 100644
--- a/src/web/app/mobile/views/components/sub-post-content.vue
+++ b/src/web/app/mobile/views/components/sub-post-content.vue
@@ -1,9 +1,9 @@
 <template>
 <div class="mk-sub-post-content">
 	<div class="body">
-		<a class="reply" v-if="post.reply_id">%fa:reply%</a>
+		<a class="reply" v-if="post.replyId">%fa:reply%</a>
 		<mk-post-html v-if="post.ast" :ast="post.ast" :i="os.i"/>
-		<a class="rp" v-if="post.repost_id">RP: ...</a>
+		<a class="rp" v-if="post.repostId">RP: ...</a>
 	</div>
 	<details v-if="post.media">
 		<summary>({{ post.media.length }}個のメディア)</summary>
diff --git a/src/web/app/mobile/views/components/timeline.vue b/src/web/app/mobile/views/components/timeline.vue
index c0e766523f..999f4a1f1e 100644
--- a/src/web/app/mobile/views/components/timeline.vue
+++ b/src/web/app/mobile/views/components/timeline.vue
@@ -41,7 +41,7 @@ export default Vue.extend({
 	},
 	computed: {
 		alone(): boolean {
-			return (this as any).os.i.following_count == 0;
+			return (this as any).os.i.followingCount == 0;
 		}
 	},
 	mounted() {
diff --git a/src/web/app/mobile/views/components/ui.header.vue b/src/web/app/mobile/views/components/ui.header.vue
index 66e10a0f8a..2bf47a90a9 100644
--- a/src/web/app/mobile/views/components/ui.header.vue
+++ b/src/web/app/mobile/views/components/ui.header.vue
@@ -57,9 +57,9 @@ export default Vue.extend({
 				}
 			});
 
-			const ago = (new Date().getTime() - new Date((this as any).os.i.account.last_used_at).getTime()) / 1000
+			const ago = (new Date().getTime() - new Date((this as any).os.i.account.lastUsedAt).getTime()) / 1000
 			const isHisasiburi = ago >= 3600;
-			(this as any).os.i.account.last_used_at = new Date();
+			(this as any).os.i.account.lastUsedAt = new Date();
 			if (isHisasiburi) {
 				(this.$refs.welcomeback as any).style.display = 'block';
 				(this.$refs.main as any).style.overflow = 'hidden';
diff --git a/src/web/app/mobile/views/components/user-timeline.vue b/src/web/app/mobile/views/components/user-timeline.vue
index 39f959187c..73ff440dc2 100644
--- a/src/web/app/mobile/views/components/user-timeline.vue
+++ b/src/web/app/mobile/views/components/user-timeline.vue
@@ -33,7 +33,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/posts', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			with_media: this.withMedia,
 			limit: limit + 1
 		}).then(posts => {
@@ -50,7 +50,7 @@ export default Vue.extend({
 		more() {
 			this.moreFetching = true;
 			(this as any).api('users/posts', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				with_media: this.withMedia,
 				limit: limit + 1,
 				until_id: this.posts[this.posts.length - 1].id
diff --git a/src/web/app/mobile/views/pages/followers.vue b/src/web/app/mobile/views/pages/followers.vue
index 1edf4e38ad..b5267bebf4 100644
--- a/src/web/app/mobile/views/pages/followers.vue
+++ b/src/web/app/mobile/views/pages/followers.vue
@@ -7,7 +7,7 @@
 	<mk-users-list
 		v-if="!fetching"
 		:fetch="fetchUsers"
-		:count="user.followers_count"
+		:count="user.followersCount"
 		:you-know-count="user.followers_you_know_count"
 		@loaded="onLoaded"
 	>
@@ -54,7 +54,7 @@ export default Vue.extend({
 		},
 		fetchUsers(iknow, limit, cursor, cb) {
 			(this as any).api('users/followers', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				iknow: iknow,
 				limit: limit,
 				cursor: cursor ? cursor : undefined
diff --git a/src/web/app/mobile/views/pages/following.vue b/src/web/app/mobile/views/pages/following.vue
index 0dd171cce1..d8c31c9f01 100644
--- a/src/web/app/mobile/views/pages/following.vue
+++ b/src/web/app/mobile/views/pages/following.vue
@@ -7,7 +7,7 @@
 	<mk-users-list
 		v-if="!fetching"
 		:fetch="fetchUsers"
-		:count="user.following_count"
+		:count="user.followingCount"
 		:you-know-count="user.following_you_know_count"
 		@loaded="onLoaded"
 	>
@@ -54,7 +54,7 @@ export default Vue.extend({
 		},
 		fetchUsers(iknow, limit, cursor, cb) {
 			(this as any).api('users/following', {
-				user_id: this.user.id,
+				userId: this.user.id,
 				iknow: iknow,
 				limit: limit,
 				cursor: cursor ? cursor : undefined
diff --git a/src/web/app/mobile/views/pages/home.vue b/src/web/app/mobile/views/pages/home.vue
index b110fc4091..be9101aa7f 100644
--- a/src/web/app/mobile/views/pages/home.vue
+++ b/src/web/app/mobile/views/pages/home.vue
@@ -82,8 +82,8 @@ export default Vue.extend({
 		};
 	},
 	created() {
-		if ((this as any).os.i.account.client_settings.mobile_home == null) {
-			Vue.set((this as any).os.i.account.client_settings, 'mobile_home', [{
+		if ((this as any).os.i.account.clientSettings.mobile_home == null) {
+			Vue.set((this as any).os.i.account.clientSettings, 'mobile_home', [{
 				name: 'calendar',
 				id: 'a', data: {}
 			}, {
@@ -105,14 +105,14 @@ export default Vue.extend({
 				name: 'version',
 				id: 'g', data: {}
 			}]);
-			this.widgets = (this as any).os.i.account.client_settings.mobile_home;
+			this.widgets = (this as any).os.i.account.clientSettings.mobile_home;
 			this.saveHome();
 		} else {
-			this.widgets = (this as any).os.i.account.client_settings.mobile_home;
+			this.widgets = (this as any).os.i.account.clientSettings.mobile_home;
 		}
 
-		this.$watch('os.i.account.client_settings', i => {
-			this.widgets = (this as any).os.i.account.client_settings.mobile_home;
+		this.$watch('os.i.account.clientSettings', i => {
+			this.widgets = (this as any).os.i.account.clientSettings.mobile_home;
 		}, {
 			deep: true
 		});
@@ -144,7 +144,7 @@ export default Vue.extend({
 			Progress.done();
 		},
 		onStreamPost(post) {
-			if (document.hidden && post.user_id !== (this as any).os.i.id) {
+			if (document.hidden && post.userId !== (this as any).os.i.id) {
 				this.unreadCount++;
 				document.title = `(${this.unreadCount}) ${getPostSummary(post)}`;
 			}
@@ -157,15 +157,15 @@ export default Vue.extend({
 		},
 		onHomeUpdated(data) {
 			if (data.home) {
-				(this as any).os.i.account.client_settings.mobile_home = data.home;
+				(this as any).os.i.account.clientSettings.mobile_home = data.home;
 				this.widgets = data.home;
 			} else {
-				const w = (this as any).os.i.account.client_settings.mobile_home.find(w => w.id == data.id);
+				const w = (this as any).os.i.account.clientSettings.mobile_home.find(w => w.id == data.id);
 				if (w != null) {
 					w.data = data.data;
 					this.$refs[w.id][0].preventSave = true;
 					this.$refs[w.id][0].props = w.data;
-					this.widgets = (this as any).os.i.account.client_settings.mobile_home;
+					this.widgets = (this as any).os.i.account.clientSettings.mobile_home;
 				}
 			}
 		},
@@ -194,7 +194,7 @@ export default Vue.extend({
 			this.saveHome();
 		},
 		saveHome() {
-			(this as any).os.i.account.client_settings.mobile_home = this.widgets;
+			(this as any).os.i.account.clientSettings.mobile_home = this.widgets;
 			(this as any).api('i/update_mobile_home', {
 				home: this.widgets
 			});
diff --git a/src/web/app/mobile/views/pages/post.vue b/src/web/app/mobile/views/pages/post.vue
index 2ed2ebfcfd..49a4bfd9dc 100644
--- a/src/web/app/mobile/views/pages/post.vue
+++ b/src/web/app/mobile/views/pages/post.vue
@@ -38,7 +38,7 @@ export default Vue.extend({
 			this.fetching = true;
 
 			(this as any).api('posts/show', {
-				post_id: this.$route.params.post
+				postId: this.$route.params.post
 			}).then(post => {
 				this.post = post;
 				this.fetching = false;
diff --git a/src/web/app/mobile/views/pages/profile-setting.vue b/src/web/app/mobile/views/pages/profile-setting.vue
index 941165c99e..d4bb254877 100644
--- a/src/web/app/mobile/views/pages/profile-setting.vue
+++ b/src/web/app/mobile/views/pages/profile-setting.vue
@@ -69,7 +69,7 @@ export default Vue.extend({
 				this.avatarSaving = true;
 
 				(this as any).api('i/update', {
-					avatar_id: file.id
+					avatarId: file.id
 				}).then(() => {
 					this.avatarSaving = false;
 					alert('%i18n:mobile.tags.mk-profile-setting.avatar-saved%');
@@ -83,7 +83,7 @@ export default Vue.extend({
 				this.bannerSaving = true;
 
 				(this as any).api('i/update', {
-					banner_id: file.id
+					bannerId: file.id
 				}).then(() => {
 					this.bannerSaving = false;
 					alert('%i18n:mobile.tags.mk-profile-setting.banner-saved%');
diff --git a/src/web/app/mobile/views/pages/user.vue b/src/web/app/mobile/views/pages/user.vue
index 7ff897e42d..c4d6b67e6c 100644
--- a/src/web/app/mobile/views/pages/user.vue
+++ b/src/web/app/mobile/views/pages/user.vue
@@ -27,15 +27,15 @@
 				</div>
 				<div class="status">
 					<a>
-						<b>{{ user.posts_count | number }}</b>
+						<b>{{ user.postsCount | number }}</b>
 						<i>%i18n:mobile.tags.mk-user.posts%</i>
 					</a>
 					<a :href="`@${acct}/following`">
-						<b>{{ user.following_count | number }}</b>
+						<b>{{ user.followingCount | number }}</b>
 						<i>%i18n:mobile.tags.mk-user.following%</i>
 					</a>
 					<a :href="`@${acct}/followers`">
-						<b>{{ user.followers_count | number }}</b>
+						<b>{{ user.followersCount | number }}</b>
 						<i>%i18n:mobile.tags.mk-user.followers%</i>
 					</a>
 				</div>
diff --git a/src/web/app/mobile/views/pages/user/home.followers-you-know.vue b/src/web/app/mobile/views/pages/user/home.followers-you-know.vue
index 1a2b8f7083..508ab4b4a7 100644
--- a/src/web/app/mobile/views/pages/user/home.followers-you-know.vue
+++ b/src/web/app/mobile/views/pages/user/home.followers-you-know.vue
@@ -27,7 +27,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/followers', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			iknow: true,
 			limit: 30
 		}).then(res => {
diff --git a/src/web/app/mobile/views/pages/user/home.friends.vue b/src/web/app/mobile/views/pages/user/home.friends.vue
index b37f1a2fe8..469781abb9 100644
--- a/src/web/app/mobile/views/pages/user/home.friends.vue
+++ b/src/web/app/mobile/views/pages/user/home.friends.vue
@@ -20,7 +20,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/get_frequently_replied_users', {
-			user_id: this.user.id
+			userId: this.user.id
 		}).then(res => {
 			this.users = res.map(x => x.user);
 			this.fetching = false;
diff --git a/src/web/app/mobile/views/pages/user/home.photos.vue b/src/web/app/mobile/views/pages/user/home.photos.vue
index f12f59a407..94b5af5531 100644
--- a/src/web/app/mobile/views/pages/user/home.photos.vue
+++ b/src/web/app/mobile/views/pages/user/home.photos.vue
@@ -29,7 +29,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/posts', {
-			user_id: this.user.id,
+			userId: this.user.id,
 			with_media: true,
 			limit: 6
 		}).then(posts => {
diff --git a/src/web/app/mobile/views/pages/user/home.posts.vue b/src/web/app/mobile/views/pages/user/home.posts.vue
index 70b20ce943..654f7f63e0 100644
--- a/src/web/app/mobile/views/pages/user/home.posts.vue
+++ b/src/web/app/mobile/views/pages/user/home.posts.vue
@@ -20,7 +20,7 @@ export default Vue.extend({
 	},
 	mounted() {
 		(this as any).api('users/posts', {
-			user_id: this.user.id
+			userId: this.user.id
 		}).then(posts => {
 			this.posts = posts;
 			this.fetching = false;
diff --git a/src/web/app/mobile/views/pages/user/home.vue b/src/web/app/mobile/views/pages/user/home.vue
index e3def61512..1afcd1f5ba 100644
--- a/src/web/app/mobile/views/pages/user/home.vue
+++ b/src/web/app/mobile/views/pages/user/home.vue
@@ -1,6 +1,6 @@
 <template>
 <div class="root home">
-	<mk-post-detail v-if="user.pinned_post" :post="user.pinned_post" :compact="true"/>
+	<mk-post-detail v-if="user.pinnedPost" :post="user.pinnedPost" :compact="true"/>
 	<section class="recent-posts">
 		<h2>%fa:R comments%%i18n:mobile.tags.mk-user-overview.recent-posts%</h2>
 		<div>
@@ -31,7 +31,7 @@
 			<x-followers-you-know :user="user"/>
 		</div>
 	</section>
-	<p v-if="user.host === null">%i18n:mobile.tags.mk-user-overview.last-used-at%: <b><mk-time :time="user.account.last_used_at"/></b></p>
+	<p v-if="user.host === null">%i18n:mobile.tags.mk-user-overview.last-used-at%: <b><mk-time :time="user.account.lastUsedAt"/></b></p>
 </div>
 </template>
 
diff --git a/src/web/app/mobile/views/pages/welcome.vue b/src/web/app/mobile/views/pages/welcome.vue
index 8557448346..7a809702c5 100644
--- a/src/web/app/mobile/views/pages/welcome.vue
+++ b/src/web/app/mobile/views/pages/welcome.vue
@@ -8,7 +8,7 @@
 			<form @submit.prevent="onSubmit">
 				<input v-model="username" type="text" pattern="^[a-zA-Z0-9_]+$" placeholder="ユーザー名" autofocus required @change="onUsernameChange"/>
 				<input v-model="password" type="password" placeholder="パスワード" required/>
-				<input v-if="user && user.account.two_factor_enabled" v-model="token" type="number" placeholder="トークン" required/>
+				<input v-if="user && user.account.twoFactorEnabled" v-model="token" type="number" placeholder="トークン" required/>
 				<button type="submit" :disabled="signing">{{ signing ? 'ログインしています' : 'ログイン' }}</button>
 			</form>
 			<div>
@@ -70,7 +70,7 @@ export default Vue.extend({
 			(this as any).api('signin', {
 				username: this.username,
 				password: this.password,
-				token: this.user && this.user.account.two_factor_enabled ? this.token : undefined
+				token: this.user && this.user.account.twoFactorEnabled ? this.token : undefined
 			}).then(() => {
 				location.reload();
 			}).catch(() => {
diff --git a/src/web/app/stats/tags/index.tag b/src/web/app/stats/tags/index.tag
index 4b167ccbc8..bf08c38c3a 100644
--- a/src/web/app/stats/tags/index.tag
+++ b/src/web/app/stats/tags/index.tag
@@ -57,7 +57,7 @@
 </mk-index>
 
 <mk-posts>
-	<h2>%i18n:stats.posts-count% <b>{ stats.posts_count }</b></h2>
+	<h2>%i18n:stats.posts-count% <b>{ stats.postsCount }</b></h2>
 	<mk-posts-chart v-if="!initializing" data={ data }/>
 	<style lang="stylus" scoped>
 		:scope
diff --git a/src/web/docs/api/endpoints/posts/create.yaml b/src/web/docs/api/endpoints/posts/create.yaml
index 5e2307dab4..70d35008c0 100644
--- a/src/web/docs/api/endpoints/posts/create.yaml
+++ b/src/web/docs/api/endpoints/posts/create.yaml
@@ -11,19 +11,19 @@ params:
     desc:
       ja: "投稿の本文"
       en: "The text of your post"
-  - name: "media_ids"
+  - name: "mediaIds"
     type: "id(DriveFile)[]"
     optional: true
     desc:
       ja: "添付するメディア(1~4つ)"
       en: "Media you want to attach (1~4)"
-  - name: "reply_id"
+  - name: "replyId"
     type: "id(Post)"
     optional: true
     desc:
       ja: "返信する投稿"
       en: "The post you want to reply"
-  - name: "repost_id"
+  - name: "repostId"
     type: "id(Post)"
     optional: true
     desc:
diff --git a/src/web/docs/api/entities/drive-file.yaml b/src/web/docs/api/entities/drive-file.yaml
index 2ebbb089ab..02ab0d608e 100644
--- a/src/web/docs/api/entities/drive-file.yaml
+++ b/src/web/docs/api/entities/drive-file.yaml
@@ -11,13 +11,13 @@ props:
     desc:
       ja: "ファイルID"
       en: "The ID of this file"
-  - name: "created_at"
+  - name: "createdAt"
     type: "date"
     optional: false
     desc:
       ja: "アップロード日時"
       en: "The upload date of this file"
-  - name: "user_id"
+  - name: "userId"
     type: "id(User)"
     optional: false
     desc:
@@ -59,7 +59,7 @@ props:
     desc:
       ja: "ファイルのURL"
       en: "The URL of this file"
-  - name: "folder_id"
+  - name: "folderId"
     type: "id(DriveFolder)"
     optional: true
     desc:
diff --git a/src/web/docs/api/entities/post.yaml b/src/web/docs/api/entities/post.yaml
index f780263144..8a616f088b 100644
--- a/src/web/docs/api/entities/post.yaml
+++ b/src/web/docs/api/entities/post.yaml
@@ -11,13 +11,13 @@ props:
     desc:
       ja: "投稿ID"
       en: "The ID of this post"
-  - name: "created_at"
+  - name: "createdAt"
     type: "date"
     optional: false
     desc:
       ja: "投稿日時"
       en: "The posted date of this post"
-  - name: "via_mobile"
+  - name: "viaMobile"
     type: "boolean"
     optional: true
     desc:
@@ -29,7 +29,7 @@ props:
     desc:
       ja: "投稿の本文"
       en: "The text of this post"
-  - name: "media_ids"
+  - name: "mediaIds"
     type: "id(DriveFile)[]"
     optional: true
     desc:
@@ -41,7 +41,7 @@ props:
     desc:
       ja: "添付されているメディア"
       en: "The attached media"
-  - name: "user_id"
+  - name: "userId"
     type: "id(User)"
     optional: false
     desc:
@@ -64,7 +64,7 @@ props:
     optional: false
     desc:
       ja: "<a href='/docs/api/reactions'>リアクション</a>をキーとし、この投稿に対するそのリアクションの数を値としたオブジェクト"
-  - name: "reply_id"
+  - name: "replyId"
     type: "id(Post)"
     optional: true
     desc:
@@ -76,7 +76,7 @@ props:
     desc:
       ja: "返信した投稿"
       en: "The replyed post"
-  - name: "repost_id"
+  - name: "repostId"
     type: "id(Post)"
     optional: true
     desc:
diff --git a/src/web/docs/api/entities/user.yaml b/src/web/docs/api/entities/user.yaml
index a451a40807..60f2c86084 100644
--- a/src/web/docs/api/entities/user.yaml
+++ b/src/web/docs/api/entities/user.yaml
@@ -11,7 +11,7 @@ props:
     desc:
       ja: "ユーザーID"
       en: "The ID of this user"
-  - name: "created_at"
+  - name: "createdAt"
     type: "date"
     optional: false
     desc:
@@ -29,7 +29,7 @@ props:
     desc:
       ja: "アカウントの説明(自己紹介)"
       en: "The description of this user"
-  - name: "avatar_id"
+  - name: "avatarId"
     type: "id(DriveFile)"
     optional: true
     desc:
@@ -41,7 +41,7 @@ props:
     desc:
       ja: "アバターのURL"
       en: "The URL of the avatar of this user"
-  - name: "banner_id"
+  - name: "bannerId"
     type: "id(DriveFile)"
     optional: true
     desc:
@@ -53,13 +53,13 @@ props:
     desc:
       ja: "バナーのURL"
       en: "The URL of the banner of this user"
-  - name: "followers_count"
+  - name: "followersCount"
     type: "number"
     optional: false
     desc:
       ja: "フォロワーの数"
       en: "The number of the followers for this user"
-  - name: "following_count"
+  - name: "followingCount"
     type: "number"
     optional: false
     desc:
@@ -81,25 +81,25 @@ props:
     desc:
       ja: "自分がこのユーザーをミュートしているか"
       en: "Whether you muted this user"
-  - name: "posts_count"
+  - name: "postsCount"
     type: "number"
     optional: false
     desc:
       ja: "投稿の数"
       en: "The number of the posts of this user"
-  - name: "pinned_post"
+  - name: "pinnedPost"
     type: "entity(Post)"
     optional: true
     desc:
       ja: "ピン留めされた投稿"
       en: "The pinned post of this user"
-  - name: "pinned_post_id"
+  - name: "pinnedPostId"
     type: "id(Post)"
     optional: true
     desc:
       ja: "ピン留めされた投稿のID"
       en: "The ID of the pinned post of this user"
-  - name: "drive_capacity"
+  - name: "driveCapacity"
     type: "number"
     optional: false
     desc:
@@ -119,13 +119,13 @@ props:
       en: "The account of this user on this server"
     defName: "account"
     def:
-      - name: "last_used_at"
+      - name: "lastUsedAt"
         type: "date"
         optional: false
         desc:
           ja: "最終利用日時"
           en: "The last used date of this user"
-      - name: "is_bot"
+      - name: "isBot"
         type: "boolean"
         optional: true
         desc:
@@ -139,13 +139,13 @@ props:
           en: "The info of the connected twitter account of this user"
         defName: "twitter"
         def:
-          - name: "user_id"
+          - name: "userId"
             type: "string"
             optional: false
             desc:
               ja: "ユーザーID"
               en: "The user ID"
-          - name: "screen_name"
+          - name: "screenName"
             type: "string"
             optional: false
             desc: