Senba Onsen; Hanatebako
Hitoyoshi, Kumamoto, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Hitoyoshi, Kumamoto, Japan
- Water type
- thermal, sodium chloride
- 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
Senba Onsen, also called Hanatebako, is located in Hitoyoshi, Kumamoto Prefecture. Its sodium-chloride source reaches around 40°C, with an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Hanatebako' (花手箱 — flower treasure box) at Senba Onsen in Hitoyoshi, one of Kumamoto's most beloved traditional hot spring towns in the upper Kuma River valley. Hitoyoshi is famous for its medieval castle, the Kuma River white-water rapids (one of Japan's three great rapid rivers, ideal for rafting), and a cluster of neighbourhood onsen that have served the castle-town community since the Edo period. The 'flower treasure box' name honours Hitoyoshi's spring cherry blossom festivals.
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 thermal & sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.