Etymology and distribution of オサイ.

Osai* 【オサイ】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Oosaka-fu · Toukyou-to , Fukui-ken Katsuyama-shi .

① There is a scene in the name of a man. Fukui-ken Katsuyama-shi Distributed in Saiko - ji.

② Sina series . There is a record of naturalization on Osaka-fu Sakai-shi on January 22, 1991. The real name is Guo. 郭 Kaku reference.