Kawa no Eki Funagoya; Koibotaru Onsenkan
Chikugo, Fukuoka, Japan
- Location
- Chikugo, Fukuoka, 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
Kawa no Eki Funagoya – Koibotaru Onsenkan, in Chikugo, Fukuoka Prefecture, offers sodium-chloride water heated to 41°C. Facilities include an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Koibotaru Onsenkan, the love-firefly river station spring, serves Chikugo City at the Funagoya river dock on the Chikugo River — Kyushu longest river and the ancient boundary between the northern Fukuoka plain and the southern Saga highlands. The Chikugo River is renowned throughout Kyushu for its genji firefly populations that create spectacular summer displays along the reed-bed banks each June, and the Kawa no Eki concept combining hot spring bathing with riverside firefly viewing has made this Chikugo destination uniquely atmospheric in Japan river-spa culture.
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.