That's funny, but I'm not sure it's true. Your first link seems to say (it's worded awkwardly) that Japanese women in the US have a 84.5 year life expectancy. This isn't quite as high as the 85.66 life expectancy Japanese women have in Japan (https://www.cia.gov/library/publications/the-world-factbook/...)

That's despite people of Asian descent in the US having higher income and education than the average, both of which are positively correlated with life expectancy.

Even if it is true, I'm not sure what the significance would be. I would be surprised if you couldn't pick out many subgroups in the US which do better in the US than in their places of origin, without it supporting an argument about the quality of the overall system.