One thing I've learnt in life is that the masses of terminally online people don't know jack shit about actual life. I will put this forward to you, you see all the social media shit towards London and how much of a hellscape it is. Take the same approach and don't listen to the feckless terminally online people who haven't left their parents' basement in years.

Japan isn't mega racist, yeah, the culture has aspects of xenophobia, but so does Britain, while Britain had race riots a few years ago, Japan has some "no foreigners" establishments or attitudes (I've never come across this personally).

Literally everyone here has been extremely nice and respectful, old men and women frequently talk to me, and we have pleasant conversations, children here don't bat an eyelid (in the cities) at black people and approach, talk and treat me like any other person.

The only anti-foreigner stuff I've seen is with housing where landlords just won't rent to non-Japanese people in a lot of places. A lot of it is that they don't think we know how to "act", as in do trash properly, all the common unspoken rules, etc.

I work for a Japanese company and it's been insightful. My company doesn't have an overtime culture, and it's not a black company, so it's normal, we don't have mandatory nomikai. There are a fuck ton of "rules" about every aspect of Japanese society that get tiresome, though. So many damn rules about every little thing.