Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Kaminoho Onsen / Hohoemi no Yu is located in Seki, Gifu Prefecture. Its sodium-chloride water, at 41°C, feeds an indoor bath and an outdoor rotenburo, with a sauna rounding out the facility.
Insider tip — Hohoemi no Yu, the smiling hot spring, serves the Kaminoho community of Seki City whose 13th-century swordsmithing tradition has evolved into world-class precision cutlery manufacturing. Seki blades are carried by professional chefs from Tokyo to Paris, and the annual Seki Hamono Festival each October draws master bladesmiths to demonstrate tamahagane forging techniques passed down through 700 years of unbroken craft lineage.