diff --git a/src/locales/ja.json b/src/locales/ja.json
index 2953688e..feb9945f 100644
--- a/src/locales/ja.json
+++ b/src/locales/ja.json
@@ -76,7 +76,7 @@
   "common.setting.rollback": "前に戻る",
   "modal.cover.outline.remove": "外壁の取り外し",
   "modal.cover.outline.select.move": "外壁選択の移動",
-  "plan.menu.placement.surface": "実測値入力",
+  "plan.menu.placement.surface": "配置面",
   "plan.menu.placement.surface.slope.setting": "傾斜設定",
   "plan.menu.placement.surface.drawing": "配置面の描画",
   "modal.placement.surface.drawing.straight.line": "直線",