diff --git a/README-en.md b/README-en.md
index 1c28dfc..efedc89 100644
--- a/README-en.md
+++ b/README-en.md
@@ -1,5 +1,9 @@
 # skyway-webrtc-gateway
 
+**This is the old SkyWay repository.  Please consider migrating to the [new SkyWay](<https://skyway.ntt.com>).**
+
+---
+
 [日本語版はこちら](./README.md)
 
 SkyWay WebRTC Gateway is an experimental approach to expand WebRTC possiblity. We're seeking new partners who challanges innovation.
diff --git a/README.md b/README.md
index d5d21c6..ccb9a4b 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # skyway-webrtc-gateway
 
+**これは旧SkyWayのリポジトリです。[新しいSkyWay](<https://skyway.ntt.com>)への移行をご検討ください。**
+
+---
+
 [English version of this document](./README-en.md)
 
 SkyWay WebRTC Gatewayは、WebRTCの可能性を広げる実験的な取り組みです。