Etymology and distribution of 是澤.

Koresawa 【是澤】^{レベル4
About 600}  The Japanese surnames etymology dictionary.

Shizuoka-ken Shimada-shi , Shizuoka-ken Shizuoka-shi . Terrain . From Shino and Valley. Shizuoka-ken Shimada-shi Funa is based. Shizuoka-ken Shimada-shi There is Shinokeya in Sakamoto's underworld.

Korezawa 【是澤】^{レベル4
About 600}  The Japanese surnames etymology dictionary.

Hokkaidou . A variant of 笹川 . 笹川 Sasagawa reference.

※ Kagoshima-ken Kumage-gun Minamitane-chou was in the Warring States Period.