diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 0316927952..d4457b6594 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -925,12 +925,6 @@ desktop/views/input-dialog.vue:
   cancel: "キャンセル"
   ok: "決定"
 
-desktop/views/components/messaging-room-window.vue:
-  title: "メッセージ:"
-
-desktop/views/components/messaging-window.vue:
-  title: "メッセージ"
-
 desktop/views/components/note-detail.vue:
   private: "この投稿は非公開です"
   deleted: "この投稿は削除されました"
@@ -1100,7 +1094,7 @@ desktop/views/components/timeline.vue:
   hybrid: "ソーシャル"
   global: "グローバル"
   mentions: "あなた宛て"
-  messages: "メッセージ"
+  messages: "ダイレクト投稿"
   list: "リスト"
   hashtag: "ハッシュタグ"
   add-tag-timeline: "ハッシュタグを追加"
@@ -1535,9 +1529,6 @@ desktop/views/pages/user/user.timeline.vue:
   with-media: "メディア"
   my-posts: "私の投稿"
 
-desktop/views/widgets/messaging.vue:
-  title: "メッセージ"
-
 desktop/views/widgets/notifications.vue:
   title: "通知"
 
@@ -1685,7 +1676,7 @@ mobile/views/pages/home.vue:
   hybrid: "ソーシャル"
   global: "グローバル"
   mentions: "あなた宛て"
-  messages: "メッセージ"
+  messages: "ダイレクト投稿"
 
 mobile/views/pages/tag.vue:
   no-posts-found: "ハッシュタグ「{q}」が付けられた投稿は見つかりませんでした。"
diff --git a/src/client/app/desktop/views/components/messaging-room-window.vue b/src/client/app/desktop/views/components/messaging-room-window.vue
index ea94fa1bd7..00cd423cd2 100644
--- a/src/client/app/desktop/views/components/messaging-room-window.vue
+++ b/src/client/app/desktop/views/components/messaging-room-window.vue
@@ -1,6 +1,6 @@
 <template>
 <mk-window ref="window" width="500px" height="560px" :popout-url="popout" @closed="destroyDom">
-	<template #header><fa icon="comments"/> {{ $t('title') }} <mk-user-name :user="user"/></template>
+	<template #header><fa icon="comments"/> {{ $t('@.messaging') }}: <mk-user-name :user="user"/></template>
 	<x-messaging-room :user="user" :class="$style.content"/>
 </mk-window>
 </template>
@@ -12,7 +12,7 @@ import { url } from '../../../config';
 import getAcct from '../../../../../misc/acct/render';
 
 export default Vue.extend({
-	i18n: i18n('desktop/views/components/messaging-room-window.vue'),
+	i18n: i18n(),
 	components: {
 		XMessagingRoom: () => import('../../../common/views/components/messaging-room.vue').then(m => m.default)
 	},
diff --git a/src/client/app/desktop/views/components/messaging-window.vue b/src/client/app/desktop/views/components/messaging-window.vue
index 51f7e2fe51..1572c40669 100644
--- a/src/client/app/desktop/views/components/messaging-window.vue
+++ b/src/client/app/desktop/views/components/messaging-window.vue
@@ -1,6 +1,6 @@
 <template>
 <mk-window ref="window" width="500px" height="560px" @closed="destroyDom">
-	<template #header :class="$style.header"><fa icon="comments"/>{{ $t('title') }}</template>
+	<template #header :class="$style.header"><fa icon="comments"/>{{ $t('@.messaging') }}</template>
 	<x-messaging :class="$style.content" @navigate="navigate"/>
 </mk-window>
 </template>
@@ -11,7 +11,7 @@ import i18n from '../../../i18n';
 import MkMessagingRoomWindow from './messaging-room-window.vue';
 
 export default Vue.extend({
-	i18n: i18n('desktop/views/components/messaging-window.vue'),
+	i18n: i18n(),
 	components: {
 		XMessaging: () => import('../../../common/views/components/messaging.vue').then(m => m.default)
 	},
diff --git a/src/client/app/desktop/views/pages/messaging-room.vue b/src/client/app/desktop/views/pages/messaging-room.vue
index 5bc28947cb..376b402d30 100644
--- a/src/client/app/desktop/views/pages/messaging-room.vue
+++ b/src/client/app/desktop/views/pages/messaging-room.vue
@@ -12,7 +12,7 @@ import parseAcct from '../../../../../misc/acct/parse';
 import getUserName from '../../../../../misc/get-user-name';
 
 export default Vue.extend({
-	i18n: i18n('.vue'),
+	i18n: i18n(),
 	components: {
 		XMessagingRoom: () => import('../../../common/views/components/messaging-room.vue').then(m => m.default)
 	},
@@ -51,7 +51,7 @@ export default Vue.extend({
 				this.user = user;
 				this.fetching = false;
 
-				document.title = `メッセージ: ${getUserName(this.user)}`;
+				document.title = this.$t('@.messaging') + ': ' + getUserName(this.user);
 
 				Progress.done();
 			});
diff --git a/src/client/app/desktop/views/widgets/messaging.vue b/src/client/app/desktop/views/widgets/messaging.vue
index 1cb4f0a670..1e82ae3d3a 100644
--- a/src/client/app/desktop/views/widgets/messaging.vue
+++ b/src/client/app/desktop/views/widgets/messaging.vue
@@ -1,7 +1,7 @@
 <template>
 <div class="mkw-messaging">
 	<ui-container :show-header="props.design == 0">
-		<template #header><fa icon="comments"/>{{ $t('title') }}</template>
+		<template #header><fa icon="comments"/>{{ $t('@.messaging') }}</template>
 		<template #func><button @click="add"><fa icon="plus"/></button></template>
 
 		<x-messaging ref="index" compact @navigate="navigate"/>
@@ -21,7 +21,7 @@ export default define({
 		design: 0
 	})
 }).extend({
-	i18n: i18n('desktop/views/widgets/messaging.vue'),
+	i18n: i18n(''),
 	components: {
 		XMessaging: () => import('../../../common/views/components/messaging.vue').then(m => m.default)
 	},