Yonaguni, one of the Yaeyama Islands, is the westernmost inhabited island of Japan, lying 108 kilometers from the east coast of Taiwan, between the East China Sea and the Philippine Sea. The island is administered as the town of Yonaguni, Yaeyama Gun, Okinawa, and there are three settlements: Sonai, Kubura, and Higawa. There have been …Yonaguni, one of the Yaeyama Islands, is the westernmost inhabited island of Japan, lying 108 kilometers from the east coast of Taiwan, between the East China Sea and the Philippine Sea. The island is administered as the town of Yonaguni, Yaeyama Gun, Okinawa, and there are three settlements: Sonai, Kubura, and Higawa. There have been discussions to establish direct ferry services with Taiwan in order to bolster tourism.