Food and diet play a crucial role in determining the lifespan of an individual. "Okinawa Diet" is a short book packed full of information about the longevity aspect of living in Okinawa, and how that came to be. The book provides a great deal of history about the culture of Okinawa, militaristic and otherwise.The diet itself is not that complicated, low in salt, high in vegetables and fruit, which is something we can all aspire to.However, the book delves further into the culture that enables so many centenarians to live out their lives in Okinawa. Physical activity, being revered in society, familial connections and generally staying active both physically and mentally, may all be things that contribute to a long, healthy life. This is an ancient diet that has stood the test of time, the proof is self evident in the long lives that many lead in Okinawa. Okinawa is one of the healthiest places in the world and one where people have the longest lifespans. Readers don't find a hard time reading this book :this short book is for easy understanding by everyone, young or old.