This is Yunohana (hot spring flower) from Kusatsu Onsen in Gunma Prefecture. I used about 2-3 tablespoons once, but then found out it's not compatible with my home bathtub, so I've been storing it. Please check the photos for the remaining amount and condition. This is an authentic product purchased from the Kusatsu Onsen Library, which I can't use. It has been stored at home. I am selling it because my home bathtub is not compatible. This is made by collecting and drying crystallized hot spring components. It is collected from the Yubatake (hot spring field) in Kusatsu Onsen. It is a rare product, with only about 4,000 pieces collected annually. It is sold only at authorized ryokans (Japanese inns) and souvenir shops approved by the Kusatsu Town Chamber of Commerce and Industry. Limited quantity. It is a yellowish powder that makes your skin smooth due to the sulfur content. The sulfate spring effect warms your body from the core. Kusatsu Onsen has strong acidic water. It is effective for skin diseases (athlete's foot, heat rash, eczema, scabies, etc.), neuralgia, insect bites, rheumatism, hemorrhoids, cuts, chapped skin, chilblains, acne, sprains, hives, prickly heat, rough skin, and abrasions. How to use Yunohana: In a regular unit bath, dissolve 1-2 coffee spoons in the hot water, rubbing it in. You can also get sufficient effect by dissolving a pinch in a washbasin of hot water and soaking the affected area.