Etymology and distribution of 奥沢.

Okuzawa 【奥沢】^{レベル5
About 3,500}  The Japanese surnames etymology dictionary.

Aichi-ken , Hokkaidou , Akita-ken .

① Originated from Ishikawa-ken southern part (formerly Kaga). A place name with a record since the Nara period. Toyama-ken Tonami-shi Takasu tells Meiji new surname .

② Shimane-ken Matsue-shi Originated in Shimane Town Kaga (Kaka). A place name with a record since the Nara period. The place name was also written as "Atsugi" and "Haga".

Okusawa 【奥沢】^{レベル5
About 3,500}  The Japanese surnames etymology dictionary.

鹿居 Shikai reference.