Etymology and distribution of 原本.

Haramoto 【原本】^{レベル5
About 2,000}  The Japanese surnames etymology dictionary.

Kumamoto-ken , Fukuoka-ken , Tottori-ken .

① Topography . From the mountain on the right. Kumamoto-ken Uki-shi Distributed in the Shiranuhira town.

② Topography . Tottori-ken Sakaiminato-shi Takeuchi Town tells that in the Edo period the branch of Yamamoto surname was called "from right" and Yamamoto's "mountain". 山本 Yamamoto reference.