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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長野県 上田市 殿城下郷の名字

About 40 【上原】6
About 30 【小菅】6
About 30 【神林】5
About 20 【柴崎】6
Very rare 【逢坂】5
Very rare 【有坂】5
Very rare 【嶋本】5
Very rare 【杉崎】5
Very rare 【田中】7