Comment by moufestaphio

It's not exactly a secret.

Japan is super racist. They outright will often refuse services to foreigners/non-ethnic Japanese.

Here's a quick few results:

https://en.wikipedia.org/wiki/Ethnic_issues_in_Japan#Ethnic_...

https://www.scmp.com/week-asia/politics/article/2123539/no-c...

https://asia.nikkei.com/Editor-s-Picks/Japan-Update/No-forei...