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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山形県 鶴岡市 堅苔沢淵ノ上の名字

About 40 【志田】6
About 10 【今野】6
About 10 【本間】6
About 10 【佐藤】7
About 10 【長谷川】7
Very rare 【伊藤】7
Very rare 【加藤】7
Very rare 【熊谷】6