Naruto Tennen Onsen; Aratae no Yu
Naruto, Tokushima, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Naruto, Tokushima, 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
Naruto Tennen Onsen (Aratae no Yu), in Naruto, Tokushima Prefecture, offers sodium-chloride water at 41°C, with an indoor bath, an open-air outdoor bath (rotenburo) and a sauna.
Insider tip — Aratae no Yu serves Naruto City beside the famous Naruto Whirlpools where the Kii Channel meets Osaka Bay in tidal whirlpools up to 20 metres in diameter — one of Japan three great tidal phenomena. Naruto holds a remarkable musical distinction: the first performance of Beethoven Ninth Symphony outside Europe took place here in 1918 when German World War I prisoners at the Bando Camp performed the complete symphony for Japanese audiences in an act of cultural exchange that is still commemorated.
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.