Discover Izu: Japan’s Geologic Marvel
That’s some pretty wild stuff when you think about it. In fact, the Philippine Sea Plate continues to subduct under the Eurasian Plates at a rate of at least 4 centimeters per year! All that tectonic activity explains why two of the three highest volume of onsen (hot spring) sources are here in Izu – the cities of Atami and Ito.