Etymology and distribution of 俵口.

Hyouguchi 【俵口】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

Ibaraki-ken , Kanagawa-ken , Ishikawa-ken .

① Ibaraki-ken Origin of the Koga-shi River. In the Kamakura period the name of the place with the notation of "Moro River" recorded. Place names are also written as "Shikagawa", "Shi River", "Murokawa".

② Ishikawa-ken Kanazawa-shi Birthplace of Oeji Town. Place name with a record since the North / South morning era. We use "various" of various rivers. Ishikawa-ken Kanazawa-shi Distributed in Oji Town.

Tawaraguchi 【俵口】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

成毛 Naruke reference.