Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Ono Onsen Center, in Ashikita, Kumamoto Prefecture, draws sodium-chloride thermal water at 39°C. The site features an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Ono Onsen Center' in Ashikita-cho, in the forested interior of southern Kumamoto where ancient cedar forests cover the steep river valleys feeding the Yatsushiro Sea. Ashikita's inland areas preserve some of the most pristine secondary forest in Kumamoto. The Ono (大野 — great field) area's thermal waters represent the quieter, community-focused side of Ashikita, away from the coastal tourist sites.