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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愛媛県 西条市 川根甲の名字

About 80 【越智】6
About 40 【黒瀬】5
Very rare 【相原】6
Very rare 【一色】5
Very rare 【今井】7
Very rare 【黒河】5
Very rare 【須内】4
Very rare 【渡部】6