Etymology and distribution of 甲井.

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

Shizuoka-ken . Shizuoka-ken Iwata-shi Birthplace of Okazaka Uezaka. A place name with a record since the Heian period. The place name was also written as "Gosaka" and "Sagisaka".