Etymology and distribution of 船口.

Funaguchi 【船口】^{レベル3
About 200}  The Japanese surnames etymology dictionary.

Yamanashi-ken , Shizuoka-ken , Kanagawa-ken . 室伏 's variant. Toukyou-to Chiyoda-ku Chiyoda was in the Edo era as the shogunate of the Edo shogunate of the government agency. 室伏 Murofushi reference.