"what about Japan?" is a proper response to precious few problems. At that philosophical a level there's no universally correct answer for everyone, the world i

"what about Japan?" is a proper response to precious few problems. At that philosophical a level there's no universally correct answer for everyone, the world isn't so consistent. But I'm assuming you're referring to a country who probably has birthright citizenship. Countries whose identity is usually inextricably linked to immigrants, because they wanted people to come live in the New World or something. If you want to play that game, pick one that actually suits your point, like Australia. A country that had birthright citizenship, but now doesn't. Immigration might not be Japan's solution, they are the only ones who can determine that and deal with the consequences either way. I can't of a period in remotely modern US history when immigrants weren't scorned, but managed to benefit and shape the national identity despite it.