diff --git a/locales/index.d.ts b/locales/index.d.ts
index bc7b9e8ef2..7fbfab345b 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -314,7 +314,7 @@ export interface Locale {
     "createFolder": string;
     "renameFolder": string;
     "deleteFolder": string;
-    "Folder": string;
+    "folder": string;
     "addFile": string;
     "emptyDrive": string;
     "emptyFolder": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 9568ba12d7..a2e9f9e1b5 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -311,7 +311,7 @@ folderName: "フォルダー名"
 createFolder: "フォルダーを作成"
 renameFolder: "フォルダー名を変更"
 deleteFolder: "フォルダーを削除"
-Folder: "フォルダー"
+folder: "フォルダー"
 addFile: "ファイルを追加"
 emptyDrive: "ドライブは空です"
 emptyFolder: "フォルダーは空です"