Japan has a population of 126 billion.  The largest age group is 25 to 54 at 37%.  Japans population is ageing and at the same time decreasing.  The birthrate is 1.44 and life expectancy is 84 years of age. Japan has a multipayer system that works like a single-payer system. Japans insurance plans are mostly private and the Ministry of Health and Welfare determines…