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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群馬県 吾妻郡中之条町 大道の名字

About 30 【塩野谷】5
About 30 【小淵】5
About 10 【塩原】5
About 10 【田村】7
About 10 【富沢】5
About 10 【冨沢】5
About 10 【森】7
Very rare 【小池】6
Very rare 【岡田】7
Very rare 【藤田】7