Okinawa in Japan is one of the healthiest places on earth to grow old
In Japan, there are 42,000 centenarians in 2010 (90% of which are female). It is projected that in 2030, there will be 239,000 centenarians in Japan (85% of them will be female). (Data: World Population Prospects, The 2012 Revision)
Within Japan, the islands of Okinawa are known to have a high concentration of centenarians and known for good health among older persons.
Japan’s Okinawa Island – The Healthiest Place on Earth
http://www.odditycentral.com/travel/japans-okinawa-island-the-healthiest-place-on-earth.html (accessed on 18 August 2014)
Okinawa Centenarian Study
http://www.okicent.org/study.html (accessed on 18 August 2014)