diff --git a/src/locales/ja/translation.json b/src/locales/ja/translation.json
index de35bf91..143267bb 100644
--- a/src/locales/ja/translation.json
+++ b/src/locales/ja/translation.json
@@ -81,7 +81,7 @@
   "Close modal": "モーダルを閉じる",
   "Debug": "デバッグ",
   "Options": "設定",
-  "<0>Open in OSM</0> &mdash; Opens the current view on openstreetmap.org": "__STRING_NOT_TRANSLATED__",
+  "<0>Open in OSM</0> &mdash; Opens the current view on openstreetmap.org": "<0>OSMで開く</0> &mdash; 現在の地図を openstreetmap.org で開く",
   "Export Style": "スタイルをエクスポート",
   "Download Style": "スタイルをダウンロード",
   "Download a JSON style to your computer.": "パソコンにJSONスタイルをダウンロードします。",