Etymology and distribution of 龍渕.

Tatsubuchi 【龍渕】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Gunma-ken Takasaki-shi , Saga-ken , Shimane-ken . Birth of Nagano-ken Ueda-shi Takeishi Toriya (Toya). It was in the Sengoku period in the same place. Gunma-ken Takasaki-shi Tell that it was written as "door-to-door" during the Edo period in Kamakobu-cho. 戸屋 Toya reference. Saga-ken Saga-shi The inside of the castle was in the Edo period in the Saga Samurai of the Clan office.