"Yunohana" No. 4, 500g is a naturally solidified substance from the Futamata Onsen, and is water-soluble and easily dissolves, so it can be used in home baths. Unlike commercially available 100% chemical bath additives, natural hot spring ingredients dissolve, allowing you to enjoy the hot spring atmosphere in your home bath. Weight: 500g Origin: Hokkaido, Osyamanbe, Futamata Ore size: Approximately 0.3cm - 1cm Bag size: Approximately 20cm long x 12cm wide x 2.5cm thick --------------------------------------------------- 【How to Use】 Place it in a commercially available laundry net and submerge it in the bath. The ingredients of this product will not damage the bathtub or the bath heater. The quality does not change even with long-term storage. The ingredients of the hot spring stone will gradually dissolve, so the particles of the hot spring stone will become smaller. (The usable period may vary depending on the frequency of use.) ---------------------------------------------------- 【Caution】 At the beginning of use, granular powder etc. will come out when dissolved in water or hot water. Also, it will come out again when the stone dries. This is normal in hot springs, and you don't have to worry about it, but if you have never been to Futamata Radium Onsen and are concerned about the granular powder, it is recommended to wash it in a washbasin etc. first to remove the granular powder before using it. ---------------------------------------------------- 【Introduction to Futamata Radium Onsen (Hokkaido)】 Futamata Radium Onsen in Hokkaido is a hot spring that produces valuable "Yunohana," and it is said to be one of only two places in the world, along with the Mammoth Hot Springs in Yellowstone National Park in the United States.