i went to japan 2 years ago and had some tour guides take me around tokyo. one was a man and the other a woman. both looked about 32-35 and then one mentioned he grew up in the soviet union, turns out they were both in their late 40s. i was stunned
their diets are excellent, few processed foods and lots of fish. its also looked down upon to be fat and stand out too much there.
the japanese have a great society, very kind and helpful people