diff --git a/js/locales/bootstrap-datepicker.ja.js b/js/locales/bootstrap-datepicker.ja.js
index ed0bc0f9d..699b6aefb 100644
--- a/js/locales/bootstrap-datepicker.ja.js
+++ b/js/locales/bootstrap-datepicker.ja.js
@@ -10,6 +10,7 @@
 		months: ["1月", "2月", "3月", "4月", "5月", "6月", "7月", "8月", "9月", "10月", "11月", "12月"],
 		monthsShort: ["1月", "2月", "3月", "4月", "5月", "6月", "7月", "8月", "9月", "10月", "11月", "12月"],
 		today: "今日",
-		format: "yyyy/mm/dd"
+		format: "yyyy/mm/dd",
+		clear: "クリア"
 	};
 }(jQuery));