I think you are painting with a broad brush there. If all Japanese are racist how are there so many that have intermarried with Americans? I admit I hang around with a special group of Japanese people, those connected with our city’s sister city program. But given that our student exchanges and cultural exchanges have been going on for 50 years, solely with volunteers in both cities, they could not possibly all be racist.
As to the Chinese and Japanese enmity, I was in Japan a few months ago and I asked local people how they felt about tourists from other countries. They said all were welcome. But… the Chinese were more tolerated than actually liked. There were a lot of Chinese tourists anyway.
In my experience Anybody can be racist. Everybody is never racist.
YMMV. I probably wouldn’t go on a bicycle tour through South Africa.