Etymology and distribution of 深口.

Fukaguchi 【深口】^{レベル3
About 80}  The Japanese surnames etymology dictionary.

Aomori-ken .

① Akita-ken Oodate-shi Yoshikihashi birth from Hashiuchi cho. A place name with a record since the Warring States Period.

② Yamagata-ken Yonezawa-shi Originated from the Yagi Bridge in Hanazawa's small character. A place name with a record in the notation of "Yakiki Bridge" during the Warring States Period.