Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Kamikoani-mura Yakuba Community Center / Yamafuji Onsen, in Kamikoani, Akita Prefecture, taps sodium-chloride water at 42°C. An indoor bath, an outdoor rotenburo, and a sauna are on offer.
Insider tip — Yamafuji Onsen, the mountain wisteria spring, serves Kamikoani Village — one of Japan smallest and most remote communities sustained by beech forest timber and traditional agriculture in the mountains of northern Akita. The village community centre bath provides essential social infrastructure in a settlement where the wild wisteria blooms purple across the forest margins each May, and winter isolation defines the rhythm of village life for eight months of the year.