Well, I was stationed in Okinawa for a year, when I served in the Marines, back in 1970. I didn't pay attention to diet while over there, I was only 19 years old and lean and mean. One thing however, is that the climate there is not pleasant during the summer. It is hot and very humid. Also, Okinawain people are very hard working people. The work they did was amazing! Perhaps, another fact for their long-life span might be that before the Japanese took the island back, Okinawians paid no or very little taxes. The US government paid for just about everything. So, if you want better health, pay less taxes!