Kodaira Tennen Onsen; Therme Ogawa
Kodaira, Tokyo, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Kodaira, Tokyo, Japan
- Water type
- iron-rich
- Temperature
- 38 °C
- pH
- 6.3
Water profile
Thermicity
Neutral
LowHigh
Soothing — neither hot nor cold, perfect balance.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Therme Ogawa, in Kodaira, western Tokyo, uses iron-rich water at 38°C. The bathhouse offers an indoor bath, an outdoor rotenburo and a sauna for a quiet suburban soak.
Insider tip — Therme Ogawa taps a ferruginous spring from the western Tokyo aquifer, producing amber-tinted water prized for improving circulation and warming the body deeply. The onsen is set in a quiet residential neighborhood of Kodaira, offering a genuine neighborhood bath experience away from tourist crowds. Iron-rich water can leave a faint mineral residue on skin, a sign of high mineral concentration valued by regulars. Weekday mornings attract older locals, making for a convivial and unhurried soak.
Nearby
Frequently asked questions
How hot is the water?
The water is neutral here, around 38 °C — a perfect balance, neither too hot nor too cold.
What type of water is found here?
This spot features iron-rich water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).