Tennen no Yu; Aoki Onsen
Kurume, Fukuoka, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Kurume, Fukuoka, Japan
- Water type
- thermal, sodium chloride
- Temperature
- 39 °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
Tennen no Yu, also known as Aoki Onsen, in Kurume, Fukuoka Prefecture, offers sodium-chloride thermal water at 39°C, an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Aoki Onsen' (青木 — blue/green tree) in western Kurume, near the Ariake Sea tidal plains. Kurume's western reaches merge with the extraordinary Ariake Sea mudflats — among Asia's most productive estuarine ecosystems, home to the fiddler crab, horseshoe crab, and vast shorebird migrations. The 'green tree' onsen sits at the edge where the volcanic thermal system meets the tidal influence, producing sodium-chloride waters with character shaped by both.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 39 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features thermal & sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.