Shirasawa Kogen Onsen Bokyo no Yu
Shirasawa Highlands, Numata, Gunma, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Shirasawa Highlands, Numata, Gunma, Japan
- Water type
- sulfurous
- Temperature
- 42 °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
Shirasawa Kogen Onsen Bokyo no Yu sits in the Shirasawa Highlands, part of Numata city, Gunma Prefecture. The sulfurous water surfaces at 42°C. An indoor bath, an outdoor rotenburo and a sauna are offered.
Insider tip — Perched on the volcanic White Swamp Highlands above Numata, Bokyo no Yu (waters of longing/nostalgia) sits amid beech forests at altitude; the sulfurous spring steams dramatically against winter snow, and the highland setting offers views toward the Nikko volcanic range that have inspired homesick mountain travelers for centuries.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 42 °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.