В 1950-х был самым плотнонаселенным местом на Земле, 5000+ жителей, школа, больница и все прочее.
Populated from 1887 to 1974 as a coal mining facility, Gunkanjima housed thousands of workers in its heyday. The tiny island had apartment buildings, a school, hospital, shrine, retail stores and restaurants and became the most densely populated place in the world per square meter with over 5,000 inhabitants in the 1950s. When coal mining declined, operations at the facility ceased and the island was abandoned in 1974.
https://weather.com/travel/news/gunkanjima-japans-abandoned-ghost-island-photos-20130903
Populated from 1887 to 1974 as a coal mining facility, Gunkanjima housed thousands of workers in its heyday. The tiny island had apartment buildings, a school, hospital, shrine, retail stores and restaurants and became the most densely populated place in the world per square meter with over 5,000 inhabitants in the 1950s. When coal mining declined, operations at the facility ceased and the island was abandoned in 1974.
https://weather.com/travel/news/gunkanjima-japans-abandoned-ghost-island-photos-20130903