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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秋田県 横手市 黒川上和野の名字

About 50 【佐藤】7
About 20 【伊藤】7
About 20 【味水】3
About 10 【清水】7
About 10 【高橋】7
About 10 【土田】6
Very rare 【戸島】5
Very rare 【藤井】7