Having lived in Okinawa for 3 years I have to say there are a ton of things to do. If you are into diving this is the place for you. Okinawa has miles of reefs and people from all over the worlf flock there to see the many different varities of sea life. You can also tour some old Japenese castles and get an idea of what Okinawa was like prior to the American invasion during WWII. Hit Google and do a search of Kadena Air Base. This is an Air Force Base web site that will be able to guide you in the right direction as far as activities. The island is not that large and you can drive for South(Naha) to the North in a couple of hours. Do not leave without sampling some KOBE beef. I still crave this meal years after leaving. Hope you enjoy the people of Okinawa! They are a kind and gentle society.