diff --git a/src/i18n/message_ja.json b/src/i18n/message_ja.json
new file mode 100644
index 0000000..c9efe18
--- /dev/null
+++ b/src/i18n/message_ja.json
@@ -0,0 +1,10 @@
+{
+  "Add a comment...": "コメントを追加する...",
+  "Add a reply...": "返信する...",
+  "Add tag...": "タグを追加する...",
+  "Cancel": "キャンセル",
+  "Close": "閉じる",
+  "Edit": "編集",
+  "Delete": "削除",
+  "Ok": "Ok"
+}