Ontake Kogen Onsen; Komorebi no Yu
Otaki, Nagano, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Otaki, Nagano, Japan
- Water type
- sulfurous
- Temperature
- 44 °C
- pH
- 6.5
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Komorebi no Yu, on the Ontake plateau in Otaki, Nagano, taps sulfurous water at 44°C near Mount Ontake. Indoor bath, outdoor rotenburo and sauna are on offer.
Insider tip — Komorebi no Yu, the dappled sunlight spring, serves Otaki-mura at the foot of Mount Ontake (3,067m) — Japan deadliest modern volcanic disaster when the mountain erupted without warning on September 27, 2014, killing 63 climbers on the summit trail. The Otaki community has rebuilt its identity around careful stewardship of the sacred mountain that has been a Shugendo religious practice site for over 1,200 years, and the sulfurous springs emerging from the volcanic slopes serve as daily reminders of the geothermal forces that define life in this extraordinary mountain community.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 44 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.