Okinawa, once prospered as Ryukyu Kingdom, is a subtropical island prefecture surrounded by the sea of coral reefs. It consists of forty-eight residential islands that are grouped into three areas; Okinawa islands, Miyako islands, and Ishigaki islands. Each of the area has their unique culture and language, and offers white sand beach, tropical fish, and coral reefs as well as many historic and cultural heritages -- Shuri Castle, for example, is registered as a world heritage. There are many other spots worth visiting, including Nakagusuku Castle and the flagstone streets reminiscent of ancient times of Ryukyu Kingdom era. For lunch, we recommend you to enjoy Okinawa Noodle. You can find restaurants serving the local cuisine here and there throughout the area.