Okamotoso; Tsubaki Onsen
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
In Marugame, Kagawa, Okamotoso; Tsubaki Onsen draws on sodium-chloride water reaching 41°C. An indoor bath, open-air rotenburo and sauna make up this relaxation-focused spot.
Insider tip — Okamotoso Tsubaki Onsen is a small traditional inn and bathhouse near Marugame in Kagawa, drawing sodium-chloride spring water that reflects the marine-influenced geology of the Seto Inland Sea coast. The camellia motif in its name alludes to the flowering trees that surround the property in late winter when the hillside blazes with red and white blooms. Marugame Castle, one of Japan's twelve original castles, is visible on a clear day from the facility's elevated garden. The combination of historic landscape, coastal thermal water, and fresh Kagawa seafood makes this a quietly exceptional stopover on the Shikoku pilgrimage circuit.
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 (idéal automne-hiver).