Etymology and distribution of 土洞.

Tsuchibora 【土洞】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Niigata-ken , Saitama-ken , Toukyou-to .

① Niigata - ken Jouetsu - shi Kakizaki ku Hakubi is based.

② things . From the new room. Tokushima-ken Miyoshi-shi In Tohno Iriya Ochiai tell us that you used a shiny "shinya" by a new mansion. Estimated in the Edo period. Pronunciation is Shime. Tokushima-ken Tokushima-shi Tokushima-machi castle inside was in the Edo period in the Tokushima Samurai of the Clan office.