Since the reversion to Japan, the tourism industry in Okinawa has grown rapidly along with the increased number of tourists. This development is basically attributed to the abundance of its subtropical tourism resources. Furthermore this remarkable development of the tourism has been facilitated by the promotion of the Japanese airlines. The airlines promoted Okinawa's tourism by expanding air routes, adopting the low price policy of air fares, making the destination campaign in large scale and expanding its business to the hotel industry and so on. The main purpose of this article is to clarify the effects of air transport which contributed to the development of the tourism in Okinawa especially during the period right after the International Ocean Exposition.