Imagine how bad the White Power rhetoric would be if America were 99.8% white, and that other 0.2% (not 2%. Two tenths of 1%) of non-white people included tourists, immigrants, and naturalized citizens. In a packed 20,000 person stadium, that would only be 40 non-white people in the crowd.

You Americans are so funny. It's your country that has the media going on about identity politics and racism 24/7. If America were 99.8% white nobody would bat an eye about racism because there wouldn't be a significant demografic group impacted by it.

White power is not really a thing when you can't blame a large part of society for your shortcomings. Without the race issue there are still a select few in positions of power and many slaving avay every day just to get by.

I the case of Japan it is more difficult to fit in as any foreigner. There is a strong societal norm centered around culture and mannerisms and everyone not adhering to the etiquette stands out and is considered rude. This culture takes center stage during the upbringing of Japanese children so it is engrained in them by the time they become adults.

There are exaples of (even black) people successfully adopting a Japanese way of life but it is difficult, as you said they are hammered down until they fit in.

Anyway, racist? Yes, difinitely. White (yellow?) power rhetoric - not so much. That was probably more the case before WWII.