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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宮城県 石巻市 南境町金沢の名字

About 30 【日野】6
About 10 【高橋】7
About 10 【渡辺】7
Very rare 【後藤】7
Very rare 【杉山】7