Etymology and distribution of 岡土.

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

Fukuoka-ken Kitakyuushuu-shi , Toukyou-to Machida-shi . Ooita-ken Kunisaki-shi Meiji New surname by monk of Izumoji temple of Soto sect in Aki Town. The mountain of the temple is Daisen.

※ Korean type . There is Haeundae district in Busan wide area of Korea. There is a record of naturalization on Chiba-ken Kisaradzu-shi on January 25, 1964. Choi is the real name. 崔 Sai reference. There is also "Mikumo". 三雲 Mikumo reference.