Etymology and distribution of 仁和山.

Niwayama 【仁和山】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Hokkaidou . Creation . Hokkaidou Sapporo - shi Niigata - ken Nagaoka - shi Major Arts in Chuo - ku south 1 st west - east chome tells you that from the Echigo Nagaoka lord of the clan government the Edo period gave a rename from Okouchi surname. 大河内 Ookouchi reference. It was in the Edo period to the same clan. In Kumamoto-ken Kumamoto-shi , it is a moto drama. "Wealth" is a favorable character.