Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Sakamoto Onsen (Ikoi no Ie), in Yatsushiro, Kumamoto, offers sodium-chloride water at 41°C. An indoor bath, an outdoor rotenburo and a sauna are available.
Insider tip — Sakamoto Onsen Ikoi no Ie, the rest house spring of Sakamoto district, serves the Yatsushiro hinterland where the Kuma River descends from the Kyushu Mountains before emptying into the sheltered Yatsushiro Sea. The Kuma River is one of Japan three great swift rivers (Nihon Sankyu), celebrated for its volume and speed through the dramatic Kuma gorge that has inspired landscape painters and rafting enthusiasts for centuries.