Funatsu Onsen
Aira, Kagoshima, Japan
- Location
- Aira, Kagoshima, Japan
- Water type
- thermal, 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
Funatsu Onsen is located in Aira, Kagoshima Prefecture. Its sodium-chloride thermal water emerges at 40°C. The facility has an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — 'Funatsu Onsen' (船津 — boat harbour) in a riverside district of Aira city where Kirishima volcanic chain rivers meet Kagoshima Bay. The name recalls the era of boat transport when Satsuma goods — sweet potato shochu, Satsuma ceramics, timber — were ferried through this valley to the bay and onward to Osaka. The volcanic waters of the Aira Caldera system flow warm and mineral-rich through Funatsu's neighbourhood bath.
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 thermal & sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.