I live in Japan and after Japan got bombed to hell and back almost to the stone ages, the Japanese did not migrate all over the world, they stayed, suffering to make Japan better, which worked, hell they damn near came close to economically owining the US in the 80s.
The Japanese culture is impressive even now, with all their innovations in robotics. The social culture may seems sort of weird to us, but there are still a few areas of the civilized world that have not been totally homogenized to look like Los Angeles or Hong Kong.
The Japanese are a unique people.
Their ability to wage war may have been sublimated into finding ways to make and keep money. I’ve heard many are hooked on working overtime.
Hopefully they have enough babies to survive a few more generations. We need them as allies, not enemies.
These parasites need to fix their own damn countries instead of running away from them.