Etymology and distribution of 佛性.

Busshou 【佛性】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Akita-ken Daisen-shi . Terrain . From hot water, field and swamp. Akita-ken Yuzawa-shi Kakuma - zawa (Kakumazawa) is a place name whose record era is unknown. It was in the Edo period in the same place. Akita-ken Yokote-shi Masuda-cho Yunosawa is a place name with a record since the Edo period. Place names are also written as "Yuinosawa", "Yunosawa", "Yuzawa". 湯沢 Yuzawa reference.