Ukou 【宇口】3 The Japanese surnames etymology dictionary.
Chiba-ken , Gunma-ken · Niigata-ken . Chiba-ken Sanbu-gun Yokoshibahikari-machi Origin of Mt. A place name with a record since the Edo period. The place name was also written as "Uguyama." Chiba-ken Asahi-shi I told that I was engaged in agriculture in Ashikawa. Estimated in the Edo period.