Mizu-umi Ryo

Name
The Dragon Lake is called that because of the shrine to the guardian of water on the south side of the lake. Some say that the Dragon of Water will appear here to those worthy.

Naga City
There are rumours that a Naga city called Nagashi Naga Toshi is located at the bottom of the lake.

Location
The Lake is situated on the Crab and Naga border.

Major References

 * Legend of the Five Rings; Third Edition Page 302.