About 125km west of Ishigaki and 110km east of Taiwan is the islet of Yonaguni-jima, Japan's westernmost inhabited island. Renowned for its strong sake, small horses and marlin fishing, the island is also home to the jumbo-sized Yonaguni atlas moth, the largest moth in the world.
However, most visitors come to see what lies beneath the waves. In 1985, a diver discovered what appeared to be man-made 'ruins' off the south coast of the island. In addition, the waters off the west coast are frequented by large schools of hammerhead sharks. This makes the island perhaps the most famous single diving destination in Japan.