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Hashima Island

Gunkanjima (Hashima Island)

In 1810, coal was discovered on what is now called Gunkanjima. 80 years later, in 1890, Mitsubishi acquired ownership of the island and began going all-out mining it for coal. As the mined coal turned out to be of exceptionally good quality, for almost 100 years Gunkanjima prospered as an undersea coal mining area.