diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 01b1dfa2c4..1735376b2a 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1280,6 +1280,8 @@ admin/views/users.vue:
   unverify: "公式アカウントを解除する"
   unverify-confirm: "公式アカウントを解除しますか？"
   unverified: "公式アカウントを解除しました"
+  update-remote-user: "リモートユーザー情報の更新"
+  remote-user-updated: "リモートユーザー情報を更新しました"
   users:
     title: "ユーザー"
     sort:
diff --git a/src/client/app/admin/views/users.vue b/src/client/app/admin/views/users.vue
index 6b829a2f8d..09d074eee2 100644
--- a/src/client/app/admin/views/users.vue
+++ b/src/client/app/admin/views/users.vue
@@ -20,6 +20,7 @@
 						<ui-button @click="suspendUser" :disabled="suspending"><fa :icon="faSnowflake"/> {{ $t('suspend') }}</ui-button>
 						<ui-button @click="unsuspendUser" :disabled="unsuspending">{{ $t('unsuspend') }}</ui-button>
 					</ui-horizon-group>
+					<ui-button v-if="user.host != null" @click="updateRemoteUser"><fa :icon="faSync"/> {{ $t('update-remote-user') }}</ui-button>
 					<ui-textarea v-if="user" :value="user | json5" readonly tall style="margin-top:16px;"></ui-textarea>
 				</div>
 			</div>
@@ -65,7 +66,7 @@
 import Vue from 'vue';
 import i18n from '../../i18n';
 import parseAcct from "../../../../misc/acct/parse";
-import { faCertificate, faUsers, faTerminal, faSearch, faKey } from '@fortawesome/free-solid-svg-icons';
+import { faCertificate, faUsers, faTerminal, faSearch, faKey, faSync } from '@fortawesome/free-solid-svg-icons';
 import { faSnowflake } from '@fortawesome/free-regular-svg-icons';
 import XUser from './users.user.vue';
 
@@ -89,7 +90,7 @@ export default Vue.extend({
 			offset: 0,
 			users: [],
 			existMore: false,
-			faTerminal, faCertificate, faUsers, faSnowflake, faSearch, faKey
+			faTerminal, faCertificate, faUsers, faSnowflake, faSearch, faKey, faSync
 		};
 	},
 
@@ -265,6 +266,17 @@ export default Vue.extend({
 			this.refreshUser();
 		},
 
+		async updateRemoteUser() {
+			this.$root.api('admin/update-remote-user', { userId: this.user._id }).then(res => {
+				this.$root.dialog({
+					type: 'success',
+					text: this.$t('remote-user-updated')
+				});
+			});
+
+			this.refreshUser();
+		},
+
 		async getConfirmed(text: string): Promise<Boolean> {
 			const confirm = await this.$root.dialog({
 				type: 'warning',
diff --git a/src/server/api/common/getters.ts b/src/server/api/common/getters.ts
index 1fce58b20a..1cd054cab1 100644
--- a/src/server/api/common/getters.ts
+++ b/src/server/api/common/getters.ts
@@ -1,5 +1,6 @@
 import * as mongo from 'mongodb';
 import Note from "../../../models/note";
+import User, { isRemoteUser, isLocalUser } from "../../../models/user";
 
 /**
  * Get valied note for API processing
@@ -16,3 +17,44 @@ export async function getValiedNote(noteId: mongo.ObjectID) {
 
 	return note;
 }
+
+/**
+ * Get user for API processing
+ */
+export async function getUser(userId: mongo.ObjectID) {
+	const user = await User.findOne({
+		_id: userId
+	});
+
+	if (user == null) {
+		throw 'user not found';
+	}
+
+	return user;
+}
+
+/**
+ * Get remote user for API processing
+ */
+export async function getRemoteUser(userId: mongo.ObjectID) {
+	const user = await getUser(userId);
+
+	if (!isRemoteUser(user)) {
+		throw 'user is not a remote user';
+	}
+
+	return user;
+}
+
+/**
+ * Get local user for API processing
+ */
+export async function getLocalUser(userId: mongo.ObjectID) {
+	const user = await getUser(userId);
+
+	if (!isLocalUser(user)) {
+		throw 'user is not a local user';
+	}
+
+	return user;
+}
diff --git a/src/server/api/endpoints/admin/update-remote-user.ts b/src/server/api/endpoints/admin/update-remote-user.ts
new file mode 100644
index 0000000000..9288ce1fb7
--- /dev/null
+++ b/src/server/api/endpoints/admin/update-remote-user.ts
@@ -0,0 +1,36 @@
+import * as mongo from 'mongodb';
+import $ from 'cafy';
+import ID, { transform } from '../../../../misc/cafy-id';
+import define from '../../define';
+import { getRemoteUser } from '../../common/getters';
+import { updatePerson } from '../../../../remote/activitypub/models/person';
+
+export const meta = {
+	desc: {
+		'ja-JP': '指定されたリモートユーザーの情報を更新します。',
+		'en-US': 'Update specified remote user information.'
+	},
+
+	requireCredential: true,
+	requireModerator: true,
+
+	params: {
+		userId: {
+			validator: $.type(ID),
+			transform: transform,
+			desc: {
+				'ja-JP': '対象のユーザーID',
+				'en-US': 'The user ID which you want to update'
+			}
+		},
+	}
+};
+
+export default define(meta, (ps) => new Promise((res, rej) => {
+	updatePersonById(ps.userId).then(() => res(), e => rej(e));
+}));
+
+async function updatePersonById(userId: mongo.ObjectID) {
+	const user = await getRemoteUser(userId);
+	await updatePerson(user.uri);
+}