Etymology and distribution of 青沈.

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

Shiga-ken , Wakayama-ken , Oosaka-fu . 赤井 's variant. In estimation Shiga - ken Hikone - shi Kaname Town is a name change in the early Edo period early in the "well" of Mr. Ii who was the lord of Hikone of the Clan office.