Etymology and distribution of 黄土.

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

Hyougo-ken · Oosaka-fu . Hyougo-ken Toyooka-shi There is distribution in Irishi-cho Miyauchi. There is Okuyama in the stamps of the same place.

※ Tell Nagano-ken Toumi-shi Mr. Haruhara from 1532 to 1555 (Astronomical Year) from Shigeru Takeda who is a battle commander in the Warring States period. 春原 Sunohara reference.