Okinawa Centenarian Study

Hormone-Dependent Cancer Risk Yearly Cancer Deaths (per 100,000 people)
Location	Life Expectancy	Breast	Ovarian	Prostate	Colon
Okinawa	81.2	6	3	4	8
Japan	79.9	11	3	8	16
Hong Kong	79.1	11	3	4	11
Sweden	79.0	34	10	52	19
Italy	78.3	37	4	23	17
Greece	78.1	29	3	20	13
USA	76.8	33	7	28	19

 One of the most important things about the Okinawa Centenarian Study is the fact that it is based on solid evidence. The most important evidence needed for any centenarian study is reliable age-verification data. Throughout Japan (including Okinawa prefecture), every city, town, and village records birth, marriage and death data (among other data) in a koseki (family register). This system was instituted throughout Japan in the 1870′s. The koseki is supplemented by a regular census undertaken every five years. Life tables calculated from this database show one of the world’s longest life expectancies and prevalence data show the world’s highest known concentration of centenarians for any country or state.

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