Etymology and distribution of 廿日岩.

Hatsukaiwa 【廿日岩】^{レベル3
About 150}  The Japanese surnames etymology dictionary.

Shimane-ken Yasugi-shi . Creation . Shimane-ken Yasugi-shi Kamiyamasa Takagi in Kamiyamasa Takagi from Mr. Kusunoki waiting at the influential house to try to recapture Emperor Godaigo, the emperor of the Kamakura and Northern and Morning era headed for the Oki Islands of Shimane-ken To tell. 楠 Kusunoki reference.