Hutamatta Radium Onsen in Hokkaido is a colorless and transparent hot spring water when it first wells up. However, unlike other hot springs, the components of this hot spring are highly concentrated, and over time, these components precipitate and accumulate, forming "yunohana" (hot spring flower). "Dissolved concentrated water" contains dozens of times more "yunohana" dissolved than ordinary water. When this dissolved solution is added to a bath, the concentrated components provide effects similar to bathing in a hot spring. Main body size: 30cm x 30cm x 30cm Yunohana/Dissolved concentrated water: Weight approx. 23kg (labeled as 20L, but contains approximately 21L or more) Please refrain from discounts due to high shipping and container costs. How to use: ① Add 0.3 to 1 liter of "Yunohana dissolved concentrated water" to a regular household bath, to your liking, and enjoy the hot spring atmosphere at home. The quality does not change even with long-term storage. ② The "yunohana" is completely dissolved by the dissolving and concentrating device, so it is almost transparent and does not stain the bathtub. ③ It has no effect on bathtubs or reheating boilers. ④ When immersing mineral stones in a bathtub circulation system or directly in the bathtub, regular cleaning is required, which poses problems in terms of maintenance and hygiene. However, the dissolved concentrated water only needs to be added to the bathtub, so there is no generation of bacteria. ⑤ It is harmless to the human body, but do not use it for drinking. [Introduction to Hutamatta Radium Onsen (Hokkaido)] Radium hot springs "publicly known" in Japan include Hutamatta Onsen (Hokkaido), Tamagawa Onsen (Akita Prefecture), Arima Onsen (Hyogo Prefecture), Misasa Onsen (Tottori Prefecture), and Masutomi Onsen (Yamanashi Prefecture), which are popular among therapeutic bathers.