Iriomote Island of approximately 130Km in size, located in the west of Ishigaki Island, is the second largest island in this prefecture after Okinawa's main land. The most part of the island is mountainius area, over 90% of which is coverd with tropical and subtropical virgin forest, most of which is untouched jungle. The climate of Iriomote is much closer to tropical than subtropical. Overwhelmingrainfall creates tropical rain forest climate, and it has been said to be the last land of mystery in Japan, where world-class rare species of animals such as the "Iriomote lynx", "Serpent eagle", and "Semaruhakogame (turtle)" live even today. Just like the land, the sea around Iriomote Island has the underwater jungle of coral reefs, offering numerous diving spots that are second to none.