1. I bet Japanese in several prefectures of Japan outlive the general population of Japanese as well.

2. Populations with a lot of immigrants tend to have strange health and longevity statistics. See for example the Hispanic Paradox https://en.wikipedia.org/wiki/Hispanic_paradox

That can be the people with Asian roots bringing their eating traditions with them immigrating in the US. Like mostly cooking by themselves instead of eating out. Or frequency of snacking. Or having a different palate/diet than Anglos and other ethnicities.

He has interesting ideas but then presents his alternate views, without a rigorous scientific approach, as settled. Worth investigating though.