Okinawa Institute of Science and Technology Graduate University (OIST), Onna-son, Okinawa, Japan (website). Okinawa is a beautiful tropical island and is the primary resort vacation destination in Japan. Travel on Okinawa is extremely safe as is the case on mainland Japan. Tourists can enjoy an ancient culture with 9 world heritage sites, a strong crafts tradition in ceramics, textiles, and glass, a lively contemporary music scene, breathtaking empty beaches and crowded old world market places.