Ashi Yu
- Location
- Kanazawa, Ishikawa Prefecture, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
Ashi Yu—Foot Waters or Reed Hot Water—is a thermal foot bath (ashiyu) facility in Japan, representing one of the most accessible and socially inclusive expressions of Japanese onsen culture, where the ashiyu tradition of public foot bathing in volcanic mineral water allows visitors to enjoy the warmth of thermal spring immersion without the commitment of a full bath, making the soothing warmth of volcanic mineral water available to passing travelers, elderly visitors, and those who prefer not to fully immerse. The simple alkaline mineral waters warm the feet and calves—the portion of the body that Japanese balneology highlights as the key zone for whole-body warming—offering the volcanic mineral experience of the full spring through the exposed extremities in the time it takes to rest and appreciate the natural surroundings. This foot bath facility participates in the Japanese tradition of making thermal bathing universally accessible as a community amenity rather than an exclusive resort feature.