Experience the ancient healing power of Japanese hot springs in the comfort of your own home with Onsen Secret Hot Spring Mineral Bath. Our unique blend of rare minerals from a medicinal hot spring in Hokkaido, Japan, combined with 20 million-year-old coral fossil and cedar wood powder, provides a therapeutic hot spring bath experience that promotes relaxation, stress relief, antioxidant action, relief from menstrual cramps, skin hydration, detox and replenishment, and muscles relaxation. The time-released healing minerals activate your body's inner healing for up to 3 hours after each 15-minute soak.