Etymology and distribution of Japanese surnames.

The Japanese surnames etymology dictionary.
https://play.google.com/store/apps/details?id=info.jigensha.jcedfreeGoogle Play で手に入れよう https://apps.apple.com/us/app/id1471109324
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山形県 飽海郡遊佐町 富岡道内の名字

About 20 【小田原】5
About 20 【高橋】7
About 10 【佐藤】7
About 10 【富樫】6
Very rare 【後藤】7
Very rare 【常田】5
Very rare 【渡辺】7