diff --git a/src/client/sw/create-notification.ts b/src/client/sw/create-notification.ts
new file mode 100644
index 0000000000..2935eb100c
--- /dev/null
+++ b/src/client/sw/create-notification.ts
@@ -0,0 +1,116 @@
+/*
+ * Notification manager for SW
+ */
+declare var self: ServiceWorkerGlobalScope;
+
+import { getNoteSummary } from '../../misc/get-note-summary';
+import getUserName from '../../misc/get-user-name';
+import { swLang } from '@/sw/lang';
+import { I18n } from '@/scripts/i18n';
+import { pushNotificationData } from '../../types';
+
+export async function createNotification(data: pushNotificationData) {
+	const n = await composeNotification(data);
+	if (n) return self.registration.showNotification(...n);
+}
+
+async function composeNotification(data: pushNotificationData): Promise<[string, NotificationOptions] | null | undefined> {
+	if (!swLang.i18n) swLang.fetchLocale();
+	const i18n = await swLang.i18n as I18n<any>;
+	const { t } = i18n;
+
+	switch (data.type) {
+		/*
+		case 'driveFileCreated': // TODO (Server Side)
+			return [t('_notification.fileUploaded'), {
+				body: data.body.name,
+				icon: data.body.url,
+				data
+			}];
+		*/
+		case 'notification':
+			switch (data.body.type) {
+				case 'mention':
+					return [t('_notification.youGotMention', { name: getUserName(data.body.user) }), {
+						body: getNoteSummary(data.body.note, i18n.locale),
+						icon: data.body.user.avatarUrl,
+						data,
+						actions: [
+							{
+								action: 'showUser',
+								title: 'showUser'
+							}
+						]
+					}];
+
+				case 'reply':
+					return [t('_notification.youGotReply', { name: getUserName(data.body.user) }), {
+						body: getNoteSummary(data.body.note, i18n.locale),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'renote':
+					return [t('_notification.youRenoted', { name: getUserName(data.body.user) }), {
+						body: getNoteSummary(data.body.note, i18n.locale),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'quote':
+					return [t('_notification.youGotQuote', { name: getUserName(data.body.user) }), {
+						body: getNoteSummary(data.body.note, i18n.locale),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'reaction':
+					return [`${data.body.reaction} ${getUserName(data.body.user)}`, {
+						body: getNoteSummary(data.body.note, i18n.locale),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'pollVote':
+					return [t('_notification.youGotPoll', { name: getUserName(data.body.user) }), {
+						body: getNoteSummary(data.body.note, i18n.locale),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'follow':
+					return [t('_notification.youWereFollowed'), {
+						body: getUserName(data.body.user),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'receiveFollowRequest':
+					return [t('_notification.youReceivedFollowRequest'), {
+						body: getUserName(data.body.user),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'followRequestAccepted':
+					return [t('_notification.yourFollowRequestAccepted'), {
+						body: getUserName(data.body.user),
+						icon: data.body.user.avatarUrl
+					}];
+
+				case 'groupInvited':
+					return [t('_notification.youWereInvitedToGroup'), {
+						body: data.body.group.name
+					}];
+
+				default:
+					return null;
+			}
+		case 'unreadMessagingMessage':
+			if (data.body.groupId === null) {
+				return [t('_notification.youGotMessagingMessageFromUser', { name: getUserName(data.body.user) }), {
+					icon: data.body.user.avatarUrl,
+					tag: `messaging:user:${data.body.user.id}`
+				}];
+			}
+			return [t('_notification.youGotMessagingMessageFromGroup', { name: data.body.group.name }), {
+				icon: data.body.user.avatarUrl,
+				tag: `messaging:group:${data.body.group.id}`
+			}];
+		default:
+			return null;
+	}
+}
diff --git a/src/client/sw/lang.ts b/src/client/sw/lang.ts
index 21ea53e781..58657f381c 100644
--- a/src/client/sw/lang.ts
+++ b/src/client/sw/lang.ts
@@ -14,10 +14,9 @@ class SwLang {
 		return prelang;
 	});
 
-	public i18n: I18n<any> | null = null;
+	public i18n: Promise<I18n<any>> | null = null;
 
 	public setLang(newLang: string) {
-		this.i18n = null;
 		this.lang = Promise.resolve(newLang);
 		set('lang', newLang);
 		return this.fetchLocale();
@@ -25,18 +24,20 @@ class SwLang {
 
 	public async fetchLocale() {
 		// Service Workerは何度も起動しそのたびにlocaleを読み込むので、CacheStorageを使う
-		const localeUrl = `/assets/locales/${await this.lang}.${_VERSION_}.json`;
-		let localeRes = await caches.match(localeUrl);
+		return this.i18n = new Promise(async (res, rej) => {
+			const localeUrl = `/assets/locales/${await this.lang}.${_VERSION_}.json`;
+			let localeRes = await caches.match(localeUrl);
+	
+			if (!localeRes) {
+				localeRes = await fetch(localeUrl);
+				const clone = localeRes?.clone();
+				if (!clone?.clone().ok) rej('locale fetching error');
 
-		if (!localeRes) {
-			localeRes = await fetch(localeUrl);
-			const clone = localeRes?.clone();
-			if (!clone?.clone().ok) return;
+				caches.open(this.cacheName).then(cache => cache.put(localeUrl, clone));
+			}
 
-			caches.open(this.cacheName).then(cache => cache.put(localeUrl, clone));
-		}
-
-		return this.i18n = new I18n(await localeRes.json());
+			res(new I18n(await localeRes.json()));
+		});
 	}
 }
 
diff --git a/src/client/sw/notification-read.ts b/src/client/sw/notification-read.ts
new file mode 100644
index 0000000000..b4fad05632
--- /dev/null
+++ b/src/client/sw/notification-read.ts
@@ -0,0 +1,56 @@
+import { get } from "idb-keyval";
+import { pushNotificationData } from '../../types';
+
+type Accounts = {
+    [x: string]: {
+        queue: string[],
+        timeout: number | null,
+        token: string,
+    }
+};
+
+class SwNotificationRead {
+	private accounts: Accounts = {};
+
+    public async construct() {
+        const accounts = await get('accounts') as { i: string, id: string }[];
+        if (accounts) Error('Account is not recorded');
+
+		this.accounts = accounts.reduce((acc, e) => {
+            acc[e.id] = {
+                queue: [],
+                timeout: null,
+                token: e.i,
+            };
+            return acc;
+        }, {} as Accounts);
+
+        return this;
+    }
+
+	// プッシュ通知の既読をサーバーに送信
+	public async read(data: pushNotificationData) {
+        if (data.type !== 'notification' || !(data.userId in this.accounts)) return;
+
+        const account = this.accounts[data.userId]
+
+        account.queue.push(data.body.id)
+
+        // 最後の呼び出しから100ms待ってまとめて処理する
+		if (account.timeout) clearTimeout(account.timeout);
+		account.timeout = setTimeout(() => {
+			account.timeout = null;
+
+            console.info(account.token, account.queue)
+			fetch(`${location.origin}/api/notifications/read`, {
+				method: 'POST',
+				body: JSON.stringify({
+					i: account.token,
+					notificationIds: account.queue
+				})
+			});
+		}, 100);
+	}
+}
+
+export const swNotificationRead = (new SwNotificationRead()).construct();
diff --git a/src/client/sw/notification.ts b/src/client/sw/notification.ts
deleted file mode 100644
index 1a29844993..0000000000
--- a/src/client/sw/notification.ts
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * Notification manager for SW
- */
-declare var self: ServiceWorkerGlobalScope;
-
-import { getNoteSummary } from '../../misc/get-note-summary';
-import getUserName from '../../misc/get-user-name';
-import { swLang } from '@/sw/lang';
-
-class SwNotification {
-	private queue: any[] = [];
-
-	private fetching = false;
-
-	public async append(data) {
-		if (swLang.i18n) {
-			const n = await this.composeNotification(data);
-			if (n) return self.registration.showNotification(...n);
-		} else {
-			this.queue.push(data);
-			if (this.fetching == false) {
-				this.fetching = true;
-				await swLang.fetchLocale();
-				const promises = this.queue.map(this.composeNotification).map(n => {
-					if (!n) return;
-					return self.registration.showNotification(...n);
-				});
-				this.fetching = false;
-				this.queue = [];
-				return Promise.all(promises);
-			}
-		}
-	}
-
-	private composeNotification(data): [string, NotificationOptions] | null | undefined {
-		const { i18n } = swLang;
-		if (!i18n) return;
-		const { t } = i18n;
-
-		switch (data.type) {
-			case 'driveFileCreated': // TODO (Server Side)
-				return [t('_notification.fileUploaded'), {
-					body: data.body.name,
-					icon: data.body.url,
-					data
-				}];
-			case 'notification':
-				switch (data.body.type) {
-					case 'mention':
-						return [t('_notification.youGotMention', { name: getUserName(data.body.user) }), {
-							body: getNoteSummary(data.body.note, i18n.locale),
-							icon: data.body.user.avatarUrl,
-							data,
-							actions: [
-								{
-									action: 'showUser',
-									title: 'showUser'
-								}
-							]
-						}];
-
-					case 'reply':
-						return [t('_notification.youGotReply', { name: getUserName(data.body.user) }), {
-							body: getNoteSummary(data.body.note, i18n.locale),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'renote':
-						return [t('_notification.youRenoted', { name: getUserName(data.body.user) }), {
-							body: getNoteSummary(data.body.note, i18n.locale),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'quote':
-						return [t('_notification.youGotQuote', { name: getUserName(data.body.user) }), {
-							body: getNoteSummary(data.body.note, i18n.locale),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'reaction':
-						return [`${data.body.reaction} ${getUserName(data.body.user)}`, {
-							body: getNoteSummary(data.body.note, i18n.locale),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'pollVote':
-						return [t('_notification.youGotPoll', { name: getUserName(data.body.user) }), {
-							body: getNoteSummary(data.body.note, i18n.locale),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'follow':
-						return [t('_notification.youWereFollowed'), {
-							body: getUserName(data.body.user),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'receiveFollowRequest':
-						return [t('_notification.youReceivedFollowRequest'), {
-							body: getUserName(data.body.user),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'followRequestAccepted':
-						return [t('_notification.yourFollowRequestAccepted'), {
-							body: getUserName(data.body.user),
-							icon: data.body.user.avatarUrl
-						}];
-
-					case 'groupInvited':
-						return [t('_notification.youWereInvitedToGroup'), {
-							body: data.body.group.name
-						}];
-
-					default:
-						return null;
-				}
-			case 'unreadMessagingMessage':
-				if (data.body.groupId === null) {
-					return [t('_notification.youGotMessagingMessageFromUser', { name: getUserName(data.body.user) }), {
-						icon: data.body.user.avatarUrl,
-						tag: `messaging:user:${data.body.user.id}`
-					}];
-				}
-				return [t('_notification.youGotMessagingMessageFromGroup', { name: data.body.group.name }), {
-					icon: data.body.user.avatarUrl,
-					tag: `messaging:group:${data.body.group.id}`
-				}];
-			default:
-				return null;
-		}
-	}
-
-}
-
-export const swNotification = new SwNotification();
diff --git a/src/client/sw/sw.ts b/src/client/sw/sw.ts
index 5f9028ec3e..e76a49392d 100644
--- a/src/client/sw/sw.ts
+++ b/src/client/sw/sw.ts
@@ -3,9 +3,10 @@
  */
 declare var self: ServiceWorkerGlobalScope;
 
-import { get } from 'idb-keyval';
-import { swNotification } from '@/sw/notification';
+import { createNotification } from '@/sw/create-notification';
 import { swLang } from '@/sw/lang';
+import { swNotificationRead } from '@/sw/notification-read';
+import { pushNotificationData } from '../../types';
 
 //#region Variables
 // const cacheName = `mk-cache-${_VERSION_}`;
@@ -55,21 +56,23 @@ self.addEventListener('push', ev => {
 		// // クライアントがあったらストリームに接続しているということなので通知しない
 		// if (clients.length != 0) return;
 
-		const data = ev.data?.json();
+		const data: pushNotificationData = ev.data?.json();
 
 		switch (data.type) {
 			case 'notification':
-			case 'driveFileCreated':
+			// case 'driveFileCreated':
 			case 'unreadMessagingMessage':
-				return swNotification.append(data);
+				return createNotification(data);
 			case 'readAllNotifications':
 				for (const n of await self.registration.getNotifications()) {
 					n.close();
 				}
 				break;
 			case 'readNotifications':
-				for (const n of await self.registration.getNotifications()) {
-					if (data.notificationIds.includes(n.data.body.id)) n.close();
+				for (const notification of await self.registration.getNotifications()) {
+					if (data.body.notificationIds.includes(notification.data.body.id)) {
+						notification.close()
+					};
 				}
 				break;
 		}
@@ -80,7 +83,7 @@ self.addEventListener('push', ev => {
 //#region Notification
 self.addEventListener('notificationclick', ev => {
 	const { action, notification } = ev;
-	const { data } = notification;
+	const data: pushNotificationData = notification.data;
 	const { origin } = location;
 
 	const suffix = `?loginId=${data.userId}`;
@@ -104,30 +107,17 @@ self.addEventListener('notificationclick', ev => {
 	notification.close();
 });
 
-self.addEventListener('notificationclose', async ev => {
+self.addEventListener('notificationclose', ev => {
 	const { notification } = ev;
+
 	if (notification.title !== 'notificationclose') {
-		self.registration.showNotification('notificationclose', { body: `${notification.data.id}` });
+		self.registration.showNotification('notificationclose', { body: `${notification.data.body.id}` });
 	}
-	const { data } = notification;
+	const data: pushNotificationData = notification.data;
 
-	if (data.isNotification) {
-		const { origin } = location;
-
-		const accounts = await get('accounts');
-		const account = accounts.find(i => i.id === data.userId);
-
-		if (!account) return;
-
-		if (data.type === 'notification') {
-			fetch(`${origin}/api/notifications/read`, {
-				method: 'POST',
-				body: JSON.stringify({
-					i: account.token,
-					notificationIds: [data.body.id]
-				})
-			});
-		}
+	if (data.type === 'notification') {
+		console.log('close', data);
+		swNotificationRead.then(that => that.read(data));
 	}
 });
 //#endregion
diff --git a/src/services/push-notification.ts b/src/services/push-notification.ts
index f879dc094e..70300de018 100644
--- a/src/services/push-notification.ts
+++ b/src/services/push-notification.ts
@@ -4,6 +4,7 @@ import { SwSubscriptions } from '../models';
 import { fetchMeta } from '../misc/fetch-meta';
 import { PackedNotification } from '../models/repositories/notification';
 import { PackedMessagingMessage } from '../models/repositories/messaging-message';
+import { pushNotificationData } from '../types';
 
 type pushNotificationsTypes = {
 	'notification': PackedNotification;
@@ -38,7 +39,7 @@ export async function pushNotification<T extends keyof pushNotificationsTypes>(u
 
 		push.sendNotification(pushSubscription, JSON.stringify({
 			type, body, userId
-		}), {
+		} as pushNotificationData), {
 			proxy: config.proxy
 		}).catch((err: any) => {
 			//swLogger.info(err.statusCode);
diff --git a/src/types.ts b/src/types.ts
index d8eb442810..e012baf849 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -3,3 +3,9 @@ export const notificationTypes = ['follow', 'mention', 'reply', 'renote', 'quote
 export const noteVisibilities = ['public', 'home', 'followers', 'specified'] as const;
 
 export const mutedNoteReasons = ['word', 'manual', 'spam', 'other'] as const;
+
+export type pushNotificationData = {
+    type: 'notification' | 'unreadMessagingMessage' | 'readNotifications' | 'readAllNotifications',
+    body: any,
+    userId: string
+};