a group of five volcanic cones in Japan on central Kyushu, one of which, Naka-dake, has the largest crater in the world, between 16 km (10 miles) and 24 km (15 miles) in diameter. Highest cone: 1592 m (5223 ft)
Also called: Asosan /ˌɑːsəʊˈsɑːn/
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