Oka 【岡】レベル6
About 104,000
The Japanese surnames etymology dictionary.
Yamaguchi-ken Ooshima-gun Suouooshima-chou · Fukuoka-ken · Gunma-ken . Heteromorphism of 尾本 . Kumamoto-ken Kumamoto-shi Chuo-ku Honmaru was in the Edo era at the Kumamoto clan in the Clan office.