Yonaguni is the westernmost inhabited island of Japan, significantly closer to Taiwan (111 km away) than to Okinawa's main island (about 509 km away). This remote island, with a circumference of 27 kilometers, represents Japan's frontier position in the Pacific. A stone monument at Cape Irizaki marks the westernmost point of Japan.
The island's most compelling attraction lies beneath the waves. In 1986, diver Kihachiro Aratake discovered what would become known as the Yonaguni Monument while exploring the waters for hammerhead sharks. The Yonaguni Monument is a submerged rock formation 20 meters tall that lies approximately 100 kilometers east of Taiwan. The structure has sparked intense scientific debate, with marine geologist Masaaki Kimura claiming the formations are man-made stepped monoliths, though these claims have been described as pseudoarchaeological.
Visitors can explore the underwater monument through diving excursions. Take a boat out from the southeast side of Yonaguni Island and dive down into the shallow waters. The site offers exceptional diving opportunities, with the surrounding waters also known for hammerhead shark encounters and diverse marine life. Above water, the island's dramatic clifftop landscapes and coastal views provide excellent photography opportunities.
Transportation to Yonaguni requires careful planning. There are three flights a day from Painushima Ishigaki Airport and one flight a day from Naha Airport, operated by JAL. There is also a ferry that runs two trips a week from Ishigaki, with return journeys on different days, but it takes around four hours and 30 minutes and can be a rough journey.
Once on the island, rental cars cost about 5,000 yen per day while mopeds cost about 3,000 yen per day. A free community bus runs about once every two hours along the western half of the island and serves the three villages. The compact size makes the island easily navigable, allowing visitors to experience its rugged coastlines, traditional villages, and unique position at Japan's westernmost edge.
