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 蛇沢の名字

About 90 【滝本】6
About 10 【広瀬】6
About 10 【芦崎】4
Very rare 【上野】6
Very rare 【木田】6
Very rare 【清水】7
Very rare 【倉田】6
Very rare 【助田】4
Very rare 【宝田】5
Very rare 【辻】6
Very rare 【渡辺】7