Japan's obesity rate is only 3.6% while the US's is 32%, and Italy's 42%. https://ageconsearch.umn.edu/record/14321?ln=en https://ageconsearch.umn.edu/record/1

Japan's obesity rate is only 3.6% while the US's is 32%, and Italy's 42%. https://ageconsearch.umn.edu/record/14321?ln=en https://ageconsearch.umn.edu/record/14321?ln=en https://en.wikipedia.org/wiki/Obesity_in_Italy https://en.wikipedia.org/wiki/Obesity_in_Italy This suggests many consequent differences, like far fewer seniors taking all of the drugs that accompany obesity, like ACE and ARB inhibitors for hypertension, and the myriad drugs that combat diabetes. But ignoring the contribution of specific drugs, it's much more likely that fitness and the absence of comorbidity diseases are the principal factors that favor countries with significantly better basic fitness like Japan (and Taiwan and South Korea) and their reporting fewer cases. What's more, since most positive cases will never be counted unless they need hospitalization, we may simply be seeing healthier immune systems reduce case severity, so more cases in these countries are flying below the radar.