diff --git a/site/plugins/admin/languages/ja_JP.yaml b/site/plugins/admin/languages/ja_JP.yaml
index 2bb2c1a6..f10091fc 100644
--- a/site/plugins/admin/languages/ja_JP.yaml
+++ b/site/plugins/admin/languages/ja_JP.yaml
@@ -141,6 +141,7 @@ admin_message_fieldset_duplicated: "Fieldset duplicated"
 admin_message_entry_duplicated: "Entry duplicated"
 admin_message_cache_files_deleted: "Cache files deleted"
 admin_message_entry_changes_saved: "Changes successfully saved"
+admin_message_entry_changes_not_saved: "Changes not saved"
 admin_message_entry_cloned: "Entry cloned"
 admin_message_entry_created: "Entry created"
 admin_message_entry_deleted: "Entry deleted"