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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岩手県 久慈市 小久慈町第29地割の名字

About 10 【五林】3
Very rare 【相津】3
Very rare 【天麻】2
Very rare 【日沢】3
Very rare 【前川】6