Mt. Kanpuzan is a 355m tall volcano. From the beginning of its volcanic activity more than 30,000 years ago, its size has increased through the buildup of andesite lava, giving it the shape we see today. There are presently three craters that can be observed, Crater 1, Crater 2, and the Tsumakoi Pass Crater, as well as the traces of lava at Itaba no Dai Caldera. Mt.Kanpuzan is formed primarily of andesite, covered by a layer of top soil and vegetation. Also called “Oga Rocks”, this stone is widely used for things such as dikes, garden stones, gravestones, and more, and is an inextricable part of our life.