Nakagawa Onsen; Buna no Yu
Yamakita, Kanagawa, Japan
- Location
- Yamakita, Kanagawa, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Nakagawa Onsen; Buna no Yu is located in Yamakita, Kanagawa Prefecture, in a wooded mountain area. Its sodium-chloride water reaches 41°C. An indoor bath, an outdoor rotenburo bath and a sauna are on offer.
Insider tip — Buna no Yu at Nakagawa Onsen serves the Tanzawa mountain valley of Yamakita-cho where the alkaline spring has been known as Shogun no Yu (the Shogun's Bath) since Tokugawa Ieyasu used its healing waters during his campaigns in the 1580s. The Tanzawa-Oyama Quasi-National Park surrounding the spring preserves the largest beech (buna) forest in the Kanto region — the ancient trees that give this bath its name — and the Nakagawa valley trail through century-old beech groves is rated among the finest forest walks accessible from the Tokyo metropolitan area.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.