Tennen Onsen; Yachi Yu
Satsuma, Kagoshima, Japan
- Location
- Satsuma, Kagoshima, Japan
- Water type
- thermal, sodium chloride
- Temperature
- 39 °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 (Yachi Yu) is a natural hot spring in Satsuma, Kagoshima Prefecture, Japan. Its sodium-chloride thermal water sits around 39°C. An indoor bath, an outdoor rotenburo bath and a sauna are available on site.
Insider tip — 'Yachi Yu' (ヤチ湯 — edge/border spring) at Tennen Onsen in Satsuma-cho (Miyanojo district), Kagoshima. Satsuma-cho in Satsuma County was the heartland of the ancient Satsuma Province — the domain from which the entire Satsuma identity derives. The town of Miyanojo (宮之城 — shrine-of-the-castle) reflects the deep intertwining of Shinto shrine culture and domain power that defined this remarkable corner of Japan, which resisted both Toyotomi unification and Tokugawa control.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 39 °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.