diff --git a/README-jp.md b/README-jp.md
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 NES.cssは **ファミコン風(8bit ライク)** なCSSフレームワークです。
 
 
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 ## Install
 
 ### CDN
@@ -104,3 +106,10 @@ TODO: ビルドはCIでするように変更したい
 ## Copyright and license
 
 Code and documentation copyright 2018 [B.C.Rikko](https://github.com/BcRikko). Code released under the MIT License. Docs released under Creative Commons.
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+[gitter]: https://gitter.im/nostalgic-css/Lobby
+[gitter-badge]: https://img.shields.io/gitter/room/nostalgic-css/Lobby.svg