Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Ashi Yu (Do no Eki Itano) is a thermal foot bath located in Itano, Tokushima Prefecture, Japan. Its sodium-chloride water emerges at around 41°C, feeding an indoor bath and an open-air outdoor bath (rotenburo), with a sauna.
Insider tip — This roadside onsen in Tokushima Prefecture sits along a scenic rural route, offering a relaxed soak in mildly salty sodium-chloride waters. The foot-bath (ashi-yu) format is ideal for weary travelers passing through. Arrive early morning to enjoy the spring in near solitude before the day-trippers arrive. Surrounding farmland gives the setting an authentic, unhurried character.