I know some foreigners who can adapt to Japan, they speak the language quite well (or at least put in the effort to learn it), explore the country to learn more about the culture, but those are pretty rare.
The only thing Asian foreigners do is that they explore the country, but beyond that they're just as "adaptive" as 99% of the western or African foreigners here.

Like I know 1 white guy who has been living here for only 3 years so far, but can speak Japanese very well, and is even able to hold full blown political debates in Japanese.
On the other hand I know hundreds of other white guys and gals who have been living here for 20+ years, and still can't speak any Japanese beyond just "arigatou gozaimasu" and "konnichiwa"......in a heavy accent.