Sanbe Volcano that has nurtured
a bountiful way of life

Sanbe Onsen, where the light brown muddy water warms your body, is a blessing from the heat of the volcano. From the spring source, located between Mt. Magosanbe and Mt. Hikageyama, more than 3,000 liters of hot water gushes out every minute, the largest volume of natural hot spring water in the Chugoku region. The spring type is a sodium-chloride spring and the spring source temperature is around 37°C. The hot water, which is colorless and transparent immediately after it gushes out of the earth, eventually turns cloudy due to iron and other minerals. After soaking in the free-flowing hot spring water for a while, tiny bubbles of carbon dioxide envelop your body, slowly warming you up.
The heat source of Sanbe Onsen is magma that remains underground. The magma is not believed to be hot enough to cause an eruption, but it warms the groundwater that seeps down into the earth and sends it back to the surface as a hot spring.