Japan is a country known for its frequent volcanic eruptions. It's also experienced much larger "massive volcanic eruptions" thought to have struck at an average rate of once every 10,000 years. These eruptions were so powerful that they helped form the Japanese archipelago. The most recent massive volcanic eruption is to have occurred 7,300 years ago at the Kikai Caldera, which includes the island of Satsuma-Iojima in southern Kyushu. In this episode, we'll look at the latest research on massive volcanic eruptions and the insight gained from the Kikai Caldera.