diff --git a/app/javascript/mastodon/locales/ja.json b/app/javascript/mastodon/locales/ja.json
index 7b8ddbe65f..ed008e916b 100644
--- a/app/javascript/mastodon/locales/ja.json
+++ b/app/javascript/mastodon/locales/ja.json
@@ -385,6 +385,7 @@
   "mute_modal.hide_notifications": "このユーザーからの通知を隠しますか？",
   "mute_modal.indefinite": "無期限",
   "navigation_bar.about": "概要",
+  "navigation_bar.advanced_interface": "上級者向けUIに戻る",
   "navigation_bar.blocks": "ブロックしたユーザー",
   "navigation_bar.bookmarks": "ブックマーク",
   "navigation_bar.community_timeline": "ローカルタイムライン",