TOKYO >> On an island off the coast of Nagasaki, ruins that seem on the verge of collapse stand clustered behind a high seawall. Though officially known as Hashima, the island is sometimes called Gunkanjima (Battleship Island) because of its resemblance to the 1920s warship Tosa. Last year mar ked the 50th anniversary of the closing of Hashima’s coal mine, which once made the spot prosperous. ...read more read less