Etymology and distribution of 改元.

Kaimoto 【改元】^{レベル3
About 50}  The Japanese surnames etymology dictionary.

Hiroshima-ken , Shimane-ken , Yamaguchi-ken . Terrain . From iron and raw. In Shimane-ken there is a transmission that it was engaged in iron hole sinking. Estimated in the Edo period. Shimane-ken Iishi-gun Iinan-chou Distributed in upper name . There is Iron Ryuhara in the small story of the same place.

※ Korean type . Republic of Korea Ehara Munahara (Cholwon) County · Korea Democratic People's Republic of Gangwon-do Railway District has a main line. It was with Mr. Gen. Choi is the real name. 崔 Sai reference.