Okinawa is a Prefecture or sub national jurisdiction of Japan. However, it's worth mentioning it separately because it's widely believed to have the healthiest people on Earth. According to the Okinawa Centenarian Study, centenarian ratios may be the world's highest at approximately 50 per 100,000 people. The country is also home to many super centenarians, people that reach the age of 110 years old. Okinawans attribute their not only long, but healthy, happy lives to eating tons of local fruits and vegetables, as well as large quantities of tofu and seaweed. Their lives also include rigorous daily activity and relatively low stress.