diff --git a/src/client/scripts/initialize-sw.ts b/src/client/scripts/initialize-sw.ts
index abbfe4f4e2..7a364f10c3 100644
--- a/src/client/scripts/initialize-sw.ts
+++ b/src/client/scripts/initialize-sw.ts
@@ -2,6 +2,7 @@ import { instance } from '@/instance';
 import { $i } from '@/account';
 import { api } from '@/os';
 import { lang } from '@/config';
+import { SwMessage } from '@/sw/types';
 
 export async function initializeSw() {
 	if (instance.swPublickey &&
@@ -15,9 +16,10 @@ export async function initializeSw() {
 				msg: 'initialize',
 				lang,
 			});
+
 			// SEE: https://developer.mozilla.org/en-US/docs/Web/API/PushManager/subscribe#Parameters
 			registration.pushManager.subscribe({
-				userVisibleOnly: false,
+				userVisibleOnly: true,
 				applicationServerKey: urlBase64ToUint8Array(instance.swPublickey)
 			}).then(subscription => {
 				function encode(buffer: ArrayBuffer | null) {
@@ -48,6 +50,13 @@ export async function initializeSw() {
 	}
 }
 
+navigator.serviceWorker.addEventListener('message', ev => {
+	const data = ev.data as SwMessage;
+	if (data.type !== 'order') return;
+
+	data.order
+});
+
 /**
  * Convert the URL safe base64 string to a Uint8Array
  * @param base64String base64 string
diff --git a/src/client/sw/notification-read.ts b/src/client/sw/notification-read.ts
index e45f2623cf..bf0245fbf9 100644
--- a/src/client/sw/notification-read.ts
+++ b/src/client/sw/notification-read.ts
@@ -1,3 +1,5 @@
+declare var self: ServiceWorkerGlobalScope;
+
 import { get } from 'idb-keyval';
 import { pushNotificationData } from '../../types';
 
@@ -48,6 +50,8 @@ class SwNotificationRead {
 					i: account.token,
 					notificationIds: account.queue
 				})
+			}).then(res => {
+				self.registration.showNotification('notificationread', { body: `${account.queue}, ${res.ok}` });
 			});
 		}, 100);
 	}
diff --git a/src/client/sw/open-client.ts b/src/client/sw/open-client.ts
new file mode 100644
index 0000000000..89f921e7d4
--- /dev/null
+++ b/src/client/sw/open-client.ts
@@ -0,0 +1,41 @@
+/*
+ * Openers
+ * クライアントを開く関数。
+ * ユーザー、ノート、投稿フォーム、トークルーム
+ */
+declare var self: ServiceWorkerGlobalScope;
+
+import { SwMessage, swMessageOrderType } from './types';
+
+// acctからユーザーを開く
+export async function openUser(acct: string, loginId: string) {
+    open('push-user', { acct }, `${origin}/${acct}?loginId=${loginId}`, loginId)
+}
+
+// post-formのオプションから投稿フォームを開く
+export async function openPost(options: any, loginId: string) {
+    // Build share queries from options
+    let url = `${origin}/?`;
+    if (options.initialText) url += `text=${options.initialText}&`;
+    if (options.reply) url += `replyId=${options.reply.id}&`;
+    if (options.renote) url += `renoteId=${options.renote.id}&`;
+    url += `loginId=${loginId}`;
+
+    open('post', { options }, url, loginId)
+}
+
+async function open(order: swMessageOrderType, query: any, url: string, loginId: string) {
+    const client = await self.clients.matchAll({
+		includeUncontrolled: true,
+		type: 'window'
+	}).then(clients => clients.length > 0 ? clients[0] : null);
+
+    if (client) {
+        client.postMessage({ type: 'order', ...query, order, loginId, url } as SwMessage);
+
+        if ('focus' in client) (client as any).focus();
+        return;
+    }
+
+    return self.clients.openWindow(url);
+}
diff --git a/src/client/sw/sw.ts b/src/client/sw/sw.ts
index b92d337fd6..7e309c699b 100644
--- a/src/client/sw/sw.ts
+++ b/src/client/sw/sw.ts
@@ -10,7 +10,7 @@ import { pushNotificationData } from '../../types';
 
 //#region Lifecycle: Install
 self.addEventListener('install', ev => {
-	self.skipWaiting();
+	ev.waitUntil(self.skipWaiting());
 });
 //#endregion
 
@@ -38,7 +38,8 @@ self.addEventListener('fetch', ev => {
 self.addEventListener('push', ev => {
 	// クライアント取得
 	ev.waitUntil(self.clients.matchAll({
-		includeUncontrolled: true
+		includeUncontrolled: true,
+		type: 'window'
 	}).then(async clients => {
 		// // 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;
@@ -70,11 +71,21 @@ self.addEventListener('push', ev => {
 //#endregion
 
 //#region Notification
-self.addEventListener('notificationclick', ev => {
+self.addEventListener('notificationclick', async ev => {
 	const { action, notification } = ev;
 	console.log('click', action, notification)
 	const data: pushNotificationData = notification.data;
 	const { origin } = location;
+	const client = self.clients.matchAll({
+		includeUncontrolled: true,
+		type: 'window'
+	}).then(clients => {
+		for (const client of clients) {
+			client.postMessage(notification.data);
+			if ('focus' in client) (client as any).focus()
+			console.log('postMessage', client)
+		}
+	});
 
 	const suffix = `?loginId=${data.userId}`;
 
@@ -82,12 +93,12 @@ self.addEventListener('notificationclick', ev => {
 		case 'showUser':
 			switch (data.body.type) {
 				case 'reaction':
-					self.clients.openWindow(`${origin}/users/${data.body.user.id}${suffix}`);
+					await self.clients.openWindow(`${origin}/users/${data.body.user.id}${suffix}`);
 					break;
 
 				default:
 					if ('note' in data.body) {
-						self.clients.openWindow(`${origin}/users/${data.body.note.user.id}${suffix}`);
+						await self.clients.openWindow(`${origin}/users/${data.body.note.user.id}${suffix}`);
 					}
 			}
 			break;
diff --git a/src/client/sw/types.ts b/src/client/sw/types.ts
new file mode 100644
index 0000000000..6e8b7abfab
--- /dev/null
+++ b/src/client/sw/types.ts
@@ -0,0 +1,9 @@
+export type swMessageOrderType = 'post' | 'push-user' | 'push-note' | 'push-messaging-room'
+
+export type SwMessage = {
+    type: 'order';
+    order: swMessageOrderType;
+    loginId: string;
+    url: string;
+    [x: string]: any;
+};