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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福島県 田村市 春山舘の名字

About 20 【大川原】5
About 10 【橋本】7
About 10 【内田】7
Very rare 【井堀】4
Very rare 【白石】6