diff --git a/content/ja/docs/reference/glossary/namespace.md b/content/ja/docs/reference/glossary/namespace.md
index 10423897ee733..bd05562c19731 100755
--- a/content/ja/docs/reference/glossary/namespace.md
+++ b/content/ja/docs/reference/glossary/namespace.md
@@ -4,7 +4,7 @@ id: namespace
 date: 2018-04-12
 full_link: /docs/concepts/overview/working-with-objects/namespaces
 short_description: >
-  An abstraction used by Kubernetes to support multiple virtual clusters on the same physical cluster.
+  同一の物理クラスター上で複数の仮想クラスターをサポートするための機能を抽象化したものです。
 
 aka: 
 tags: