Sasebo Onsen
Sasebo, Nagasaki Prefecture, Japan
- Location
- Sasebo, Nagasaki Prefecture, 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
The Nishi Kyushu Shinkansen is a Japanese high-speed rail line and part of the nationwide Shinkansen network. Located in the northwestern part of the island of Kyushu, it is operated by the Kyushu Railway Company and is informally known as the Nagasaki Shinkansen. The 66-kilometre (41 mi) section between Nagasaki and Takeo-Onsen opened on 23 September 2022 and is the shortest Shinkansen in Japan.
Insider tip — Sasebo Onsen serves Japan's prominent naval base city on the western coast of Kyushu, where deep drilled sodium-chloride water provides a robust mineral soak. The port setting means the bathing culture blends Kyushu warmth with a practical, working-class directness. Nearby Kujuku-shima's 99 islands, visible from hilltops, add scenic context to any visit. Early-morning sessions are popular with naval personnel and fishermen before the city wakes.
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).