Exclusive economic zone of Japan
Japan has the eighth largest Exclusive Economic Zone (EEZ) in the world. The total area of Japan is about 377,973.89 km². Japan's EEZ area is vast and the territorial waters (including: the Seto Inland Sea) and EEZ together is about 4.48 million km².
Geography of Japan
There is one supervolcano in the Kikai Caldera (鬼界カルデラ) . It is a massive, mostly submerged caldera up to 19 kilometres (12 mi) in diameter in the Ōsumi Islands of Kagoshima Prefecture, Japan. It is the remains of the ancient eruption of a gigantic volcano. Its geographic coordinates are: Latitude (dd.) 30.79 and Longitude (dd.) 130.31 Kikai Caldera was the source of the Akahoya eruption, one of the largest eruptions during the Holocene (10,000 years ago to present). About 6,300 years ago or 4,300 BC, pyroclastic flows from that eruption reached the coast of southern Kyūshū up to away, and ash fell as far as Hokkaidō. The eruption produced about 150 km³ of tephra, giving it a Volcanic Explosivity Index of 7