Etymology and distribution of 大冢.

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

Okayama-ken , Hiroshima-ken . Creation . In Hiroshima-ken Ootake-shi , I tell him that Mr. Oda's residents who had lived since the early Edo period added "on" as they wanted to go over Oda at the Meiji New surname. Hiroshima-ken Ootake-shi Distributed in Nanin Rong . There is 小田 surname in the same place. 小田 Oda reference.