Japan, at its absolute worst, was still significantly better than the USA. It wasn't even close.
Total Cases per Million:
Japan: 4,605
USA: 99,176
Deaths per Million:
Japan: 80
USA: 1,769
Of course, all the anti-science Trumpers will respond to this by saying it's fake news, then quoting some QAnon source, and re-asserting that Hillary Clinton eats babies while navigating shipping tankers to block the Suez Canal, but it's pretty clear Japan dealt with Covid much better than the USA. Lots of Japanese people already wore masks during flu season, and there's no "yahoo rebel without a cause muh freedumbs" cult in Japan that compares to what the USA has.
https://www.worldometers.info/coronavirus/