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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茨城県 筑西市 東保末の名字

About 30 【広瀬】6
About 20 【水越】5
About 20 【中島】7
About 20 【森】7
About 10 【市川】6
Very rare 【内田】7
Very rare 【関】6
Very rare 【豊田】6