diff --git a/locales/ja.yml b/locales/ja.yml
index 87de0f662..efc4e575e 100644
--- a/locales/ja.yml
+++ b/locales/ja.yml
@@ -648,6 +648,7 @@ desktop/views/components/post-form.vue:
   geolocation-alert: "お使いの端末は位置情報に対応していません"
   error: "エラー"
   enter-username: "ユーザー名を入力してください"
+  annotations: "内容への注釈 (オプション)"
 
 desktop/views/components/post-form-window.vue:
   note: "新規投稿"
diff --git a/src/client/app/desktop/views/components/post-form.vue b/src/client/app/desktop/views/components/post-form.vue
index 9b8a0c0f1..334a45750 100644
--- a/src/client/app/desktop/views/components/post-form.vue
+++ b/src/client/app/desktop/views/components/post-form.vue
@@ -14,7 +14,7 @@
 			<b>%i18n:@recent-tags%:</b>
 			<a v-for="tag in recentHashtags.slice(0, 5)" @click="addTag(tag)" title="%@click-to-tagging%">#{{ tag }}</a>
 		</div>
-		<input v-show="useCw" v-model="cw" placeholder="内容への注釈 (オプション)">
+		<input v-show="useCw" v-model="cw" placeholder="%i18n:@annotations%">
 		<textarea :class="{ with: (files.length != 0 || poll) }"
 			ref="text" v-model="text" :disabled="posting"
 			@keydown="onKeydown" @paste="onPaste" :placeholder="placeholder"