Etymology and distribution of 甚口.

Jinguchi 【甚口】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Fukuoka-ken , Hyougo-ken , Nara-ken . Nagasaki-ken Gotou-shi Born in Tamanoura Town, Tamanoura. In the Kamakura period the name of the place with a record in the notation of "珠 浦". In Nagasaki-ken Gotou-shi there was a record of the name of Goshima Tamaura Moriguchi Asahi Shigeru in 1467 (first year of Senjin). Nagasaki-ken Gotou-shi Ikeda-machi was in the Edo period at the Fujiang clan of the clan office. 五島 Gotou reference. 源 Minamoto reference.