diff --git a/src/lang/ja.json b/src/lang/ja.json
index 6398be15e..407c7f8c8 100644
--- a/src/lang/ja.json
+++ b/src/lang/ja.json
@@ -981,6 +981,7 @@
   "FIELD_HIDE_OTHER_LAYERS": "他のレイヤーを非表示",
   "FIELD_SHOW_TILE_VALUES": "タイルの値を表示",
   "FIELD_SUBMIT_PLUGIN": "プラグインを申請",
+  "FIELD_WAIT_UNTIL_BUTTON_PRESSED": "ボタンが押されるまで待つ",
   "// 7": "Asset Viewer ---------------------------------------------",
   "ASSET_SEARCH": "検索...",
   "ASSET_EDIT": "編集",