diff --git a/js/src/i18n/ja.json b/js/src/i18n/ja.json
index 684369979..fcb236bd1 100644
--- a/js/src/i18n/ja.json
+++ b/js/src/i18n/ja.json
@@ -1,3 +1,5 @@
 {
-  "About Mobilizon": "Mobilizon について"
+  "About Mobilizon": "Mobilizon について",
+  "Cancel": "キャンセル",
+  "Category": "カテゴリ"
 }