diff --git a/locales/index.d.ts b/locales/index.d.ts
index 0c6e73aac4..b9c2125ae6 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -1174,10 +1174,6 @@ export interface Locale extends ILocale {
      * 保存しました
      */
     "saved": string;
-    /**
-     * チャット
-     */
-    "messaging": string;
     /**
      * アップロード
      */
@@ -8722,6 +8718,14 @@ export interface Locale extends ILocale {
          * 違反を報告する
          */
         "write:report-abuse": string;
+        /**
+         * チャットを操作する
+         */
+        "write:chat": string;
+        /**
+         * チャットを閲覧する
+         */
+        "read:chat": string;
     };
     "_auth": {
         /**
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 492d700f7d..d60425566e 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -289,7 +289,6 @@ deleteAreYouSure: "「{x}」を削除しますか？"
 resetAreYouSure: "リセットしますか？"
 areYouSure: "よろしいですか？"
 saved: "保存しました"
-messaging: "チャット"
 upload: "アップロード"
 keepOriginalUploading: "オリジナル画像を保持"
 keepOriginalUploadingDescription: "画像をアップロードする時にオリジナル版を保持します。オフにするとアップロード時にブラウザでWeb公開用画像を生成します。"
diff --git a/packages/backend/src/server/api/stream/ChannelsService.ts b/packages/backend/src/server/api/stream/ChannelsService.ts
index 253409259f..9ec0a25171 100644
--- a/packages/backend/src/server/api/stream/ChannelsService.ts
+++ b/packages/backend/src/server/api/stream/ChannelsService.ts
@@ -19,6 +19,7 @@ import { AntennaChannelService } from './channels/antenna.js';
 import { DriveChannelService } from './channels/drive.js';
 import { HashtagChannelService } from './channels/hashtag.js';
 import { RoleTimelineChannelService } from './channels/role-timeline.js';
+import { ChatChannelService } from './channels/chat.js';
 import { ReversiChannelService } from './channels/reversi.js';
 import { ReversiGameChannelService } from './channels/reversi-game.js';
 import { type MiChannelService } from './channel.js';
@@ -40,6 +41,7 @@ export class ChannelsService {
 		private serverStatsChannelService: ServerStatsChannelService,
 		private queueStatsChannelService: QueueStatsChannelService,
 		private adminChannelService: AdminChannelService,
+		private chatChannelService: ChatChannelService,
 		private reversiChannelService: ReversiChannelService,
 		private reversiGameChannelService: ReversiGameChannelService,
 	) {
@@ -62,6 +64,7 @@ export class ChannelsService {
 			case 'serverStats': return this.serverStatsChannelService;
 			case 'queueStats': return this.queueStatsChannelService;
 			case 'admin': return this.adminChannelService;
+			case 'chat': return this.chatChannelService;
 			case 'reversi': return this.reversiChannelService;
 			case 'reversiGame': return this.reversiGameChannelService;
 
diff --git a/packages/backend/src/server/api/stream/channels/chat.ts b/packages/backend/src/server/api/stream/channels/chat.ts
new file mode 100644
index 0000000000..de453323e1
--- /dev/null
+++ b/packages/backend/src/server/api/stream/channels/chat.ts
@@ -0,0 +1,63 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import { bindThis } from '@/decorators.js';
+import type { GlobalEvents } from '@/core/GlobalEventService.js';
+import type { JsonObject } from '@/misc/json-value.js';
+import Channel, { type MiChannelService } from '../channel.js';
+
+class ChatChannel extends Channel {
+	public readonly chName = 'chat';
+	public static shouldShare = false;
+	public static requireCredential = true as const;
+	public static kind = 'read:chat';
+	private otherId: string;
+
+	constructor(
+		id: string,
+		connection: Channel['connection'],
+	) {
+		super(id, connection);
+	}
+
+	@bindThis
+	public async init(params: JsonObject) {
+		if (typeof params.otherId !== 'string') return;
+		this.otherId = params.otherId;
+
+		this.subscriber.on(`chatStream:${this.user.id}-${this.otherId}`, this.onEvent);
+	}
+
+	@bindThis
+	private async onEvent(data: GlobalEvents['chat']['payload']) {
+		this.send(data.type, data.body);
+	}
+
+	@bindThis
+	public dispose() {
+		// Unsubscribe events
+		this.subscriber.off(`chatStream:${this.user.id}-${this.otherId}`, this.onEvent);
+	}
+}
+
+@Injectable()
+export class ChatChannelService implements MiChannelService<true> {
+	public readonly shouldShare = ChatChannel.shouldShare;
+	public readonly requireCredential = ChatChannel.requireCredential;
+	public readonly kind = ChatChannel.kind;
+
+	constructor(
+	) {
+	}
+
+	@bindThis
+	public create(id: string, connection: Channel['connection']): ChatChannel {
+		return new ChatChannel(
+			id,
+			connection,
+		);
+	}
+}