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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青森県 上北郡野辺地町 干草橋の名字

About 30 【古林】5
About 10 【戸田】6
Very rare 【井筒】5
Very rare 【稲城】3
Very rare 【木明】3
Very rare 【柴崎】6
Very rare 【滝沢】6