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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岐阜県 加茂郡坂祝町 酒倉一色の名字

About 40 【小栗】6
About 30 【金森】6
About 10 【渡辺】7
Very rare 【今井】7
Very rare 【松久】5
Very rare 【渡邊】6