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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高知県 吾川郡仁淀川町 上名野川の名字

About 100 【片岡】6
About 20 【大野】7
About 10 【五藤】5
About 10 【中越】5
About 10 【掛水】5
About 10 【中川】7
About 10 【西森】5
Very rare 【大白】3
Very rare 【小田原】5
Very rare 【川崎】6
Very rare 【谷村】6
Very rare 【藤村】6
Very rare 【松名】3
Very rare 【山口】7