diff --git a/js/src/i18n/ja.json b/js/src/i18n/ja.json
index 0967ef42..68436997 100644
--- a/js/src/i18n/ja.json
+++ b/js/src/i18n/ja.json
@@ -1 +1,3 @@
-{}
+{
+  "About Mobilizon": "Mobilizon について"
+}