Nagasaki Onsen; Kidoan
Nagayo, Nagasaki, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Nagayo, Nagasaki, 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
Nagasaki Onsen, known as Kidoan, is located in Nagayo, Nagasaki Prefecture. Its sodium-chloride water reaches 39°C, alongside an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Kidoan' (貴道庵 — precious-path hermitage) at Nagasaki Onsen in Nagayo-cho. The 'hermitage' name invokes the tea-ceremony aesthetic of wabi-sabi simplicity — a small, refined retreat from the world's noise. Nagayo's position in the hills above Nagasaki Harbour gives this onsen access to volcanic geothermal waters while remaining close to one of Japan's most historically layered cities — the place where East met West for two centuries of isolation.
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.