Minami-Tori-shima (南鳥島, "Southern Bird Island"), also known as Marcus Island, is an isolated Japanese coral atoll in the northwestern Pacific Ocean, located some 1,848 kilometres (1,148 mi) southeast of Tokyo and 1,267 kilometres (787 mi) east of the closest Japanese island, South Iwo Jima of the Ogasawara Islands, and nearly on a straight line between mainland Tokyo and the United States' Wake Island, 1,415 kilometres (879 mi) further to the east-southeast.