Once a thriving coal-mining colony operated by Mitsubishi, Hashima Island was home to over 5,000 residents packed into a fortress of concrete high-rises rising from the sea. After the mine closed in 1974, the island was abruptly abandoned, leaving behind apartments, schools, and tunnels eerily frozen in time. Locals and former workers speak of shadowy figures moving through the derelict corridors, echoing footsteps along the seawall, and lights flickering in buildings without power. Many believe these hauntings stem from the harsh conditions endured by forced Korean and Chinese laborers during World War II, whose spirits are said to linger in the mine shafts below. Modern explorers and Japanese paranormal teams report phantom voices and sudden cold drafts deep within the crumbling structures. Now partially open for tours, Gunkanjima stands as both a UNESCO-listed industrial relic and one of Japan’s most unsettling ghost islands.