Aiai Onsen
Naka District, Tokushima, Japan
- Location
- Naka District, Tokushima, Japan
- Water type
- sodium chloride
- Temperature
- 40 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Aiai Onsen, another address in Naka District, Tokushima Prefecture, offers sodium-chloride water at 40°C, an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — The warm name Aiai evokes togetherness in this Shikoku mountain spa; it sits amid cedar-forested hills and is popular with pilgrims walking the famous Shikoku 88 Temples circuit, who use the mineral waters to soothe tired legs between sacred sites.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.