Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Elm Kogen Onsen, locally known as Yuttari, is in Akabira, Hokkaido. Its sodium-chloride water surfaces at 42°C with a pH of 7.3, alongside an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Akabira was once a powerhouse of Hokkaido coal mining, and the Elm Kogen highland spring now brings new vitality to a community reinventing itself after the mine closures. The elm forest plateau setting is beautiful in autumn, and the spa anchors a modest local tourism revival in the Sorachi coalfield district.