Iriomote Island is Japan's second-largest island in Okinawa Prefecture and the largest of the Yaeyama Islands, located approximately 400 kilometers southwest of Okinawa's main island. Covering 289 square kilometers, the island remains 90% covered by subtropical rainforest and mangrove jungles, making it one of Japan's last great wilderness areas. The island has been inhabited for centuries by the Yaeyama people, with archaeological evidence suggesting human presence dating back over 2,000 years. Its remote location kept it relatively isolated until modern times, preserving both its natural environment and traditional culture.
The island holds exceptional ecological significance as part of the Iriomote-Ishigaki National Park and was designated a UNESCO World Heritage Site in 2021 as part of the Amami-Oshima Island, Tokunoshima Island, northern part of Okinawa Island, and Iriomote Island cluster. The island is home to the critically endangered Iriomote cat, a wild feline species found nowhere else on Earth, with an estimated population of only 100 individuals. The extensive mangrove forests along the Urauchi River and Nakama River are among Japan's finest, while the surrounding coral reefs support diverse marine ecosystems.
Visitors can explore the island through kayaking excursions along mangrove-lined waterways, particularly on the Urauchi River, Japan's longest navigable river in Okinawa. Jungle trekking leads to spectacular waterfalls including Pinaisara Falls and Mariyudo Falls, accessible via boat and hiking combinations. Snorkeling and diving at Barasu Island, an uninhabited coral fragment island, and Ida Beach showcase vibrant coral reefs and tropical fish. Guided night tours offer opportunities to observe rare wildlife, though sightings of the Iriomote cat remain extremely rare. The island's Yubu Island can be reached by traditional water buffalo cart, providing a unique cultural experience.
Iriomote Island is accessible only by ferry. Regular services operate from Ishigaki Island, with two main routes: ferries to Ohara Port on the island's southeast coast take approximately 40 minutes, while ferries to Uehara Port on the northwest coast take roughly 45 minutes. Ferry frequencies vary by season, with more departures during peak tourist periods. Ishigaki Island itself is reached by direct flights from major Japanese cities including Tokyo, Osaka, and Fukuoka. The island has no admission fees for general access, though individual tour operators and activity providers charge separate fees. Rental cars are available at both ports, and bicycles can be rented in the main settlements, though distances between attractions are substantial and public bus service is limited.
