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 揖斐郡揖斐川町 香六の名字

About 200 【小寺】6
About 40 【大久保】6
About 40 【小窪】4
About 30 【加藤】7
About 30 【中村】7
About 20 【樋口】6
Very rare 【春日】6