Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
The Kenko Kanri Center (Hyoshimizu Onsen) is set on Himeshima island, Oita Prefecture. Its sodium-chloride water reaches 41°C, served in an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Hyoshimizu Onsen serves Himeshima, the Princess Island, a tiny volcanic island of 2,000 people famous across Japan for its twice-yearly migration of asagimadara butterflies — thousands of blue-spotted Chestnut Tiger monarchs descend on the island each spring and autumn to feed on fragrant tsuwabuki flowers before continuing their transoceanic journey. The island also produces traditional chikuwa fish paste and preserves Hachiman Shrine festivals that have continued for over 1,000 years.