The Yunohana Onsen Powder is a 100% all-natural mineral mix extracted from the mineral deposit on Mt. Yakedake in the northern Japanese Alps, known for its highly concentrated mineral hot springs. When added to your bath, it creates unscented, mineral-rich water, providing a relaxing experience similar to being in an Onsen. The powder has a low alkali base, which helps protect your bathtub from damage. It is also said to warm the body, release tension, and heal the body. The product is available from various retailers and is popular for its natural and nourishing properties.