Hinohara Onsen Center; Kazuma no Yu
Hinohara-mura, Tokyo, Japan
- Location
- Hinohara-mura, Tokyo, Japan
- Water type
- bicarbonate, thermal
- 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
Hinohara Onsen Center, also known as Kazuma no Yu, is located in Hinohara-mura, a rural village within Tokyo prefecture. Its bicarbonate thermal water, slightly alkaline, emerges at around 40°C. The complex offers an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Hinohara-mura (Hinohara Village) is one of Tokyo Metropolitan area's only two remaining villages — entirely within the capital's boundaries yet deep in cedar forests, with waterfalls and the pristine Akigawa River flowing through a valley that feels like a different century. Kazuma no Yu is a genuinely rural mountain onsen barely 90 minutes from Shinjuku by car, worlds removed from the urban capital. The Kaneto Shindo film 'Hadaka no Shima' used this remote landscape; Hinohara's isolation is one of Tokyo's best-kept secrets.
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 & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.