Hello.
Throwaway account because of a lot of sensitive data.
I will move to Japan soon with my spouse (Japan citizen) using spouse visa. For now, I have registered sole proprietorship in Poland ( https://pl.wikipedia.org/wiki/Przedsi%C4%99biorca_b%C4%99d%C4%85cy_osob%C4%85_fizyczn%C4%85 ) and...