Etymology and distribution of 牛黒.

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

Fukuoka-ken . Terrain . From plum buckwheat. Fukuoka - ken Kama - shi In Kuwano I will tell that I came to 1600 (Keioi 5 years) and changed my name from Sakamoto surname. 坂本 Sakamoto reference.