Okinawa Island is the largest of the Okinawa Prefecture in Japan, located in the East China Sea. It is known for its beautiful beaches, coral reefs, and subtropical climate, making it a popular destination for tourists. The island has a rich cultural heritage, influenced by both Japanese and indigenous Ryukyu traditions. The island is also famous for its longevity, with many residents living well into their 90s and beyond. This phenomenon has attracted researchers interested in studying the Okinawan diet and lifestyle, which emphasize fresh vegetables, fish, and a strong sense of community.