Etymology and distribution of 沖岡.

Okioka 【沖岡】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Saitama-ken . Saitama-ken Chichibu-gun Higashichichibu-mura Origin of Minatoya (Kaya). A place name with a record since the Edo period. It is distributed in the same place. In the same place, the former is said as "Minatani". 皆谷 Minatani reference.