Tennen Onsen Hanasaki no Yu
Ageo, Saitama, Japan
- Location
- Ageo, Saitama, 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
Hanasaki no Yu, in Ageo (Saitama prefecture), draws natural sodium-chloride water at 41°C. An indoor bath, an outdoor rotenburo bath, and a sauna make up this neighborhood onsen.
Insider tip — Hanasaki no Yu, the flower-blooming spring, serves Ageo City in the Saitama northern plain where the annual Ageo Citizen Festival celebrates the chrysanthemum — the city flower — with spectacular floral displays each November. Ageo was historically a post town on the Nakasendo highway where travelers rested before the climb into the Musashi uplands, and the city preserves the atmospheric shopfront streetscape of its post-town heritage alongside the suburban development that has made it a major commuter community on the Takasaki Line.
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.