Etymology and distribution of 太沢.

Oosawa 【太沢】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Oosaka-fu , Nara-ken . Origin of Oosaka-fu Oosaka-shi Ikuno-ku Shodo (old: ies). A place name with a record in the Heian period. In the Edo era, the place name was called "Ose (oose)". Oosaka-fu Oosaka-shi Nishi-ku Near the vicinity of Honda (formerly Honda Machida) tells that he used the name of Sayae generously from the Edo period.