Etymology and distribution of 國寳.

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

Yamaguchi-ken Houfu-shi . Hiroshima-ken There was the name of Kobayakawa Sadahira in the warlord of the Kamakura period and the Northern and Morning era, based on Numata River flowing through Mihara-shi (formerly Numata). 小早川 Kobayakawa reference. Ooita-ken Usa-shi Iwasaki (formerly Sadahira) is a geographical name with a record in the North and the North.