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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富山県 下新川郡入善町 荒又の名字

About 200 【青木】7
About 80 【島】6
About 30 【田又】3
About 30 【林】7
Very rare 【上野】6
Very rare 【市岡】5
Very rare 【永山】6
Very rare 【折谷】4
Very rare 【久保】6
Very rare 【真岩】4