The Japanese would rather open a direct portal to hell and try to integrate literal Demons and Succubi than accept ANY Palestinians or other migrants. The few foreigners that do come there to teach English are the types that openly want to integrate and embrace Japanese culture/are weebs. Two of the biggest foriegn YouTubers/streamers in Japan got in that way and they've only been having problems with streamers AFTER they relaxed tourism visas after pandemic.

Japan would be in a better state if every woman there now only had twins or they got artificial wombs but personally I think what would help them is if they could properly tackle black company culture. Using people up like that isn't good for long term psychological stability and wouldn't surprise me if that's one of the things contributing to lower birth rates.