Isobe Onsen is well known as a hot spring which is extremely rich in its concentration of sea salt. Its ancient waters are used as an onsen and the natural sea salt from the facility has been used to create its own sand bath. Even lying under the sand for just 10 minutes will warm up your body so that you can’t stop sweating. After the bath, while slowing relaxing, your body will detoxify itself from the inside out while you are sipping some special herbal tea. It is a facility which is especially popular with young women so prior reservations are a must.