Umi Hisui Yoake

Lord Sun
The Sea of Lord Sun is where Lord Sun rises every morning above a usually calm sea. Was previously named Umi Amaterasu, but after her death and Yakamo's ascension it was renamed.

Sailing
There are a number of buoys along the coast to help sailors into the harbors along the coast and to prevent them from sailing to far out to sea.

Major References

 * Legend of the Five Rings Page 305