diff --git a/packages/i18n/strings/ja.json b/packages/i18n/strings/ja.json
index 11209711e..ecce0600b 100644
--- a/packages/i18n/strings/ja.json
+++ b/packages/i18n/strings/ja.json
@@ -433,6 +433,9 @@
           "model": {
             "name": "モデル"
           },
+          "skins": {
+            "unreleased": "Unreleased"
+          },
           "dynamic": {
             "name": "貫通テスト",
             "custom_shell": {