Tsukubasan Onsen Tsukuba no Yu
Tsukuba, Ibaraki, Japan
- Location
- Tsukuba, Ibaraki, Japan
- Water type
- sodium chloride, thermal
- 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
Tsukubasan Onsen Tsukuba no Yu is a thermal bathhouse in Tsukuba, Ibaraki prefecture, Japan. Its sodium-chloride thermal water, at 40°C, serves an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Tsukuba is Japan's science city — home to JAXA (Japan Aerospace Exploration Agency), the High Energy Accelerator Research Organization (KEK), and 300+ national research institutes housing some of the world's most advanced science. The twin-peaked Mt. Tsukuba (877 m), one of Japan's most beloved mountains, rises from the flat Kanto Plain to dominate the skyline; ancient Tsukusan Jinja shrine hosts the Tsukuba Sacred Mountain festival. 'Tsukuba no Yu' offers a thermal soak in the shadow of a mountain sacred for 2,000 years.
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 sodium chloride & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.