Tennen Onsen; A-kua
Marugame, Kagawa, Japan
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- Location
- Marugame, 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 Onsen (A-kua), in Marugame, Kagawa prefecture, Japan, offers sodium-chloride water at 41°C, with an indoor bath, an outdoor rotenburo and a sauna on site.
Insider tip — In Marugame, home to Japan's finest surviving original castle keep (Marugame Castle's stone walls are considered the finest in Japan) and the nation's premier uchiwa fan-making craft industry, A-kua Onsen (aqua spring) draws natural mineral waters beneath this compact Shikoku city; after castle climbing and fan-craft museum visits, the mineral bath is a deserved reward in Kagawa's most historically endowed city.
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.