In the Omija River located in the northern part of Iriomote Island, canyoning tours are popular, taking advantage of the terrain where the river flows through a narrow space between rocks. Canyoning is an outdoor sport that involves sliding down rock faces and jumping into the river, and many people come to the river to experience the thrill and exhilaration that cannot be experienced in any other river.
Iriomote Island is a treasure house of nature, with 90% of the island covered by subtropical virgin forest. There are many rivers flowing through the dense greenery, and vast mangrove forests have formed around the mouths of rivers. There are many activities here that allow visitors to fully enjoy nature. If you participate in snorkeling or trekking, you are sure to encounter precious plants and animals that are unique to this area.