Tennen Iyadani Onsen; Daishi no Yu
Mitoyo, Kagawa, Japan
- Location
- Mitoyo, Kagawa, Japan
- Water type
- sodium chloride
- Temperature
- 41 °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
Tennen Iyadani Onsen, or Daishi no Yu, is also located in Mitoyo, Kagawa prefecture. Its sodium-chloride water at 41°C is shared between an indoor bath and a rotenburo, complemented by a sauna.
Insider tip — Daishi no Yu evokes the healing wells attributed to Kobo Daishi (Kukai), the monk who founded the Shikoku 88-temple pilgrimage. Iyadanji Temple sits in the hills above, and white-robed henro pilgrims frequently rest here after the mountain climb.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 41 °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.