Japanese are indifferent and non-confrontational. If you don't care about what people think and don't try to integrate too hard, life isn't bad.
Most of the world is China, India and Africa.
The rest of the developed world is vastly better than Japan when it comes to treating immigrants better.
Japan: 98.5% ethnic Japanese
Immigrants in the US + their US born children = 27% of the population, roughly 86 million people, or equal to 3/4 the size of Japan's entire population. Such hostility.
I suspect that’s the key right there. From friends who are the same, I get the impression that in Japan if you’re of Japanese descent the expectations had of you are very different than the typical gaikokujin.