Sawatari Onsen
Matsumoto, Nagano Prefecture, Japan
- Location
- Matsumoto, Nagano Prefecture, Japan
- Water type
- carbonated
- Temperature
- 30 °C
- pH
- 6.3
Water profile
Thermicity
Invigorating
LowHigh
Stimulating — wakes the body and boosts circulation.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
High buoyancy
LowHigh
Mineralised water — eases movement and joints.
CO2BicarbonatesMagnésium
Sawatari Onsen is a hot spring in the mountains of Nagano Prefecture, central Japan, set in a quiet valley landscape. Its naturally carbonated thermal waters are used in the traditional onsen style for soaking and relaxation. Surrounded by forested highlands, it offers a tranquil, rustic bathing experience away from the larger resort towns.
Insider tip — Sawatari Onsen is a carbonated hot spring in the mountains east of Matsumoto, Nagano Prefecture, where naturally effervescent waters bubble up from limestone-rich geology. The carbon dioxide content of the water produces fine bubbles that adhere to the skin and gently stimulate circulation, a property long valued in Japanese balneotherapy. The surrounding highland landscape transitions from green rice paddies in summer to a frost-bitten silence in mid-winter. The spa is a favored rest stop for trekkers traversing the Utsukushigahara plateau.
Nearby
Frequently asked questions
How hot is the water?
The water is on the cooler side here, around 30 °C — an invigorating water that boosts circulation.
What type of water is found here?
This spot features carbonated water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).