Can I immigrate to Japan?

Japan is a non-immigrant country. I remember that foreigners can't get Japanese nationality generally, but it seems that they can get Japanese nationality by marrying a Japanese (China and Japan don't support dual nationality, so they have to give up one nationality). You can choose to obtain permanent residency, so you can also stay in Japan permanently.

There are hundreds of thousands of Koreans/Koreans and China people in Japan. The third and fourth generations who have settled in Japan have been born, and those who want to return to China are those who have not obtained permanent residency.