The Okinawans used to eat little or no grains, with their carbs coming from tubers. Their diet appears to have been quite different from that of the larger Japanese islands. It might help this discussion if the OP could post some links to the Okinawan diet, otherwise we are all commenting on different things
Four years Primal with influences from Jaminet & Shanahan and a focus on being anti-inflammatory. Using Primal to treat CVD and prevent stents from blocking free of drugs.
Eat creatures nose-to-tail (animal, fowl, fish, crustacea, molluscs), a large variety of vegetables (raw, cooked and fermented, including safe starches), dairy (cheese & yoghurt), occasional fruit, cocoa, turmeric & red wine