diff --git a/translations/app/ja.json b/translations/app/ja.json
index 2167f57e..47be87bf 100644
--- a/translations/app/ja.json
+++ b/translations/app/ja.json
@@ -289,5 +289,6 @@
     "it": "材料",
     "small": "小",
     "large": "大",
-    "medium": "中"
+    "medium": "中",
+    "sec": "s"
 }