Okinawa is an island with its own way of life, distinct from mainland Japan. It belongs to one of five regions in the world known as Blue Zones - made famous because their residents tend to live exceptionally long, healthy lives compared with the rest of the world.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/is-the-okinawa-diet-a-recipe-for-longevity