Okinawa is one prefecture made up of 49 inhabited islands and 111 uninhabited islands. Stretching far south of Kyushu, Okinawa has stellar beaches and unique history.
Watersports, fishing, swimming, and sailing are activities of choice in Okinawa. The food is different than in mainland Japan and worth the trip just to try. Goya champloo, sātāandagī donuts, and taco rice. Mmmmm...
Don't torture yourself with pictures of Okinawa. Just go.