Kumagaya Onsen; Yuraku no Sato
Kumagaya, Saitama, Japan
- Location
- Kumagaya, Saitama, Japan
- Water type
- sodium chloride, thermal
- Temperature
- 40 °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
Kumagaya Onsen, known as Yuraku no Sato, is located in the city of Kumagaya, Saitama Prefecture. Its sodium-chloride thermal water reaches around 40°C (pH 7.3), with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Yuraku no Sato (Village of Pleasant Bathing) is Kumagaya's second major thermal facility — testament to this sweltering Saitama city's deep affinity for thermal wellness. Japan's hottest city (41.1°C air temperature record) paradoxically produces devoted onsen fans who understand that a long, warm soak is restorative even in summer heat. The Arakawa River bicycle road connecting Kumagaya to central Tokyo passes just south of the city, making Yuraku no Sato a popular cycling endpoint destination for Tokyo riders making the 70 km round trip.
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 sodium chloride & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.