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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秋田県 山本郡八峰町 沼田家ノ下の名字

About 50 【小林】7
About 50 【金谷】6
About 40 【斎藤】7
About 20 【伊藤】7
About 20 【斉藤】7
About 20 【佐藤】7
Very rare 【石田】7
Very rare 【工藤】7
Very rare 【熊谷】6
Very rare 【後藤】7
Very rare 【嶋津】5
Very rare 【藤原】7
Very rare 【長門】5