Here is what I had to see. When I read about this place, I couldn't resist. The island's actual name is Hashima but, one look makes it obvious how it got its nickname. It resembles the battleship Tosa. A larger view is here.
The island lies 11.8 miles (19 kilometers) southwest of Nagasaki Harbor. It's tiny at 0.3 mile (480 meters) north to south and 0.1 mile (160 meters) east to west. It's surrounded by a seawall and is covered by various structures. The fascinating part is that there is a seabed coal mine under the sea surrounding the island. Coal was discovered on Hashima in 1810. Mitsubishi Limited Partnership gained control in 1890 and seabed mining began in earnest.
The mine continued producing coal until the shift to oil in the 1970s. As the demand for coal fell, the mine's output declined as did the workforce. In January 1974, the mine closed and by April of that year, the island became uninhabited.
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