As someone else mentioned, Japan is one of the most culturally homogenous societies in the world. Japan takes few immigrants, but those that do immigrate there

As someone else mentioned, Japan is one of the most culturally homogenous societies in the world. Japan takes few immigrants, but those that do immigrate there are expected to be guests and live within the established norms of Japanese culture and society. That’s the opposite mindset of the US - especially the liberal leaning areas, where the society is expected to accept and respect diversity and differences. You can immigrate to Japan as a Westerner (or even as a outwardly similar looking East Asian from Korea or China, etc), live there for decades and become fully assimilated into Japanese society, even gain citizenship, but still be treated as an outsider - not necessarily disrespectfully. You could probably say the same for other East Asian countries such as Korea, China, Taiwan, etc.