Furuyu Onsenkyo
Saga, Saga, Japan
- Location
- Saga, Saga, Japan
- Water type
- bicarbonate, calcium-rich
- Temperature
- 37 °C
- pH
- 8
Water profile
Thermicity
Neutral
LowHigh
Soothing — neither hot nor cold, perfect balance.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Furuyu Onsenkyo is an onsen (Japanese hot spring bath) located in Saga, Saga. The water emerges at around 37°C. The site includes an indoor bath, an open-air bath (rotenburo) and a sauna. A low-key address for a relaxing moment.
Insider tip — Furuyu Onsen (古湯温泉) is one of Saga's oldest and most beloved hot spring areas, with records going back over 1,300 years. The very mild calcium-bicarbonate waters (pH 7.5, 37°C) are so gentle they are safe for newborns — celebrated as 'beautiful skin' waters. In the Fuji district of Saga, near the Kase River.
Nearby
Frequently asked questions
How hot is the water?
The water is neutral here, around 37 °C — a perfect balance, neither too hot nor too cold.
What type of water is found here?
This spot features bicarbonate & calcium-rich water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.