diff --git a/locales/ja-KS.yml b/locales/ja-KS.yml
index 7f55a2ed47..36624fa6a6 100644
--- a/locales/ja-KS.yml
+++ b/locales/ja-KS.yml
@@ -1041,6 +1041,10 @@ desktop/views/pages/user/user.header.vue:
   following: "フォロー"
   followers: "フォロワー"
   is-bot: "このアカウントはBotや"
+  years-old: "歳"
+  year: "年"
+  month: "月"
+  day: "日"
 desktop/views/pages/user/user.timeline.vue:
   default: "投稿"
   with-replies: "投稿と返信"