Despite the fact Japanese are blatantly racist they have a lot of muslim immigrants too. Some Japanese racial genetics calculated that Pakistanis are DNA siblings to a Japanese race and allowed lot of them to move in to revitalize their demographics. I’m not sure it has really contributed to a Japanese gene pool but it has affected a criminal situation for sure.
All the Asian cultures are unbelievably racist. Not just against groups vastly different than them but especially against each other.