Arbitrary example: 上川. It can be both うえかわ or かみかわ (or even other variants). Which one is it? Depends where the family is originally from, I guess. It's not on

Arbitrary example: 上川. It can be both うえかわ or かみかわ (or even other variants). Which one is it? Depends where the family is originally from, I guess. It's not only people's name, it's also place names. Example: https://ja.m.wikipedia.org/wiki/%E5%85%AB%E5%B9%A1 https://ja.m.wikipedia.org/wiki/%E5%85%AB%E5%B9%A1