Iōtorishima

Iōtorishima (Japanese: 硫黄鳥島; Okinawan: Tuisima, Yuō-Tuishima, lit.'sulfur bird island'), also known as Iwo Tori-shima and Okinawa Torishima (沖縄鳥島), is a volcanic island part of the Ryūkyū Island chain with the only active volcano in Okinawa Prefecture.