Hoshi Onsen
Minakami, Gunma, Japan
- Location
- Minakami, Gunma, Japan
- Water type
- sulfurous
- Temperature
- 43 °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
Hoshi Onsen, in Minakami, Gunma Prefecture, taps sulfurous water heated to around 43°C (109°F). The bathhouse combines an indoor bath, an outdoor rotenburo and a sauna in a mountain setting.
Insider tip — Hoshi Onsen Chojukan (est. 1875) is one of Japan's most celebrated historic inns — its wood-panelled bathhouse, where spring water bubbles directly up through the stone floor, has appeared in countless photography books. Book well in advance; overnight stays are preferred but day-trips are occasionally available.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 43 °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.