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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徳島県 板野郡藍住町 乙瀬井利口の名字

About 20 【江西】4
About 20 【樫原】5
About 20 【笹田】5
About 20 【浜口】6
About 10 【広永】4
Very rare 【井上】7
Very rare 【大西】6
Very rare 【岸田】6
Very rare 【岸野】5
Very rare 【吉田】7
Very rare 【猿向】2
Very rare 【早内】3
Very rare 【藤井】7
Very rare 【柳沢】6
Very rare 【山口】7