Etymology and distribution of 冨岩.

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

Hiroshima-ken . Terrain . Hiroshima-ken tells that the branch of Hiroshima-ken Takehara-shi Department Valley (Gitani) last name added "Oka". There is a designation of "room (Haya)" in the barn head of the branch where the branch lives in Hiroshima-ken . 部谷 Heya reference.