Sakura-jima, one of Japan’s most active volcanoes, is a 13,000 year old Decade volcano located in Kyūshū, Japan, overlooking the city of Kagoshima (population of 680,000 approx). Sakura-jima lies in the Aira Caldera which formed during an eruption 22,000 years ago. This eruption is believed to have been in the order of a VEI7, producing…