Hashima Island (Gunkanjima)
Battleship Island: a concrete mining city of five thousand people packed onto six hectares of rock, abandoned overnight in 1974 and left to rust into the world's most famous ghost island.
Case File No. 127
FILE 01 The Legend
Coal was found under this speck in the 1810s; Mitsubishi bought the island in 1890 and spent a century mining under the seabed, reclaiming land and raising Japan's first concrete apartment blocks to house the families of miners. By 1959, 5,259 people lived on 6.3 hectares — history's densest recorded population — with schools, shops, a cinema, rooftop playgrounds and a pachinko parlour, the whole silhouette bristling like a battleship. Petroleum killed coal: the mine closed in January 1974 and the last residents left on 20 April, leaving rice bowls on tables. The island sat sealed and forbidden for three decades; ferry tours now run to a fenced walkway through the ruin. UNESCO listed it in 2015 as part of Japan's Meiji industrial revolution — over Korea's objection, because wartime Mitsubishi worked the mine with conscripted Koreans and Chinese, several hundred of whom died here.
FILE 02 The Sightings Log
Nobody lived to tell ghost stories on-site — the island emptied in a day — but the abandonment itself is the phenomenon: tour guides report the 'sound of children' on the wind at the school block, and photographers describe apartment interiors where personal objects still sit in place behind broken glass.
FILE 03 The Skeptic’s File
Nothing supernatural is claimed by anyone who knows the island; its horror is entirely documentary — instant abandonment, wartime forced labour, forty years of forbidden decay. Even the UNESCO listing is contested history rather than mystery: Japan promised to tell the forced-labour story at the site and has been rebuked twice by the World Heritage Committee for not doing it. The ghosts of Gunkanjima are political, and they are real.