Hayashi Onsen; Katakuri no Yu
Naganohara, Gunma, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Naganohara, Gunma, Japan
- 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
Hayashi Onsen (Katakuri no Yu) is located in Naganohara, Gunma Prefecture, Japan, a mountainous area known for its hot springs. The sulfurous thermal water runs hot, around 44°C. The site includes an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Katakuri no Yu' (dogtooth violet waters) at Hayashi Onsen in Naganohara, in the volcanic corridor leading to the famous Kusatsu Onsen. The delicate katakuri flower blooms in mountain meadows in early spring — a symbol of the alpine beauty surrounding these Gunma hot springs.
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 & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.