Chichibu Yumoto; Buko Onsen
Yokoze-machi, Chichibu, Saitama, Japan
- Location
- Yokoze-machi, Chichibu, Saitama, Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Chichibu Yumoto Buko Onsen is in Yokoze-machi, Chichibu District, Saitama Prefecture. Its bicarbonate water emerges at 40°C, pH 8. The site offers an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — At the foot of Mount Buko in the Chichibu mountains of Saitama — where the limestone quarrying of this sacred peak for Tokyo's concrete has paradoxically preserved the surrounding mountain culture — Buko Onsen draws gentle bicarbonate waters from the Chichibu aquifer; the 34-temple Chichibu Pilgrimage circuit and the luminous Chichibu Night Festival create one of the Kanto region's richest cultural landscapes.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.