diff --git a/strings/ja.json b/strings/ja.json
index 80af12d8..b5237352 100644
--- a/strings/ja.json
+++ b/strings/ja.json
@@ -1,3 +1,5 @@
 {
-  "ButtonAdd": "追加"
+  "ButtonAdd": "追加",
+  "ButtonCancel": "キャンセル",
+  "ButtonCancelTimer": "キャンセルタイマー"
 }