Michi no Eki Hotaru Kaido Nishinoichi; Nishinoichi Onsen
Shimonoseki, Yamaguchi, Japan
- Location
- Shimonoseki, Yamaguchi, Japan
- Water type
- sodium chloride, thermal
- Temperature
- 38 °C
- pH
- 7.3
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
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Michi no Eki Hotaru Kaido Nishinoichi, including its Nishinoichi Onsen bath, is located in Shimonoseki, Yamaguchi Prefecture. The sodium-chloride, thermal water flows at 38°C, pH 7.3. An indoor bath, an outdoor rotenburo bath and a sauna are offered.
Insider tip — Nishinoichi Onsen sits on the 'Firefly Road' (蛍街道) near Shimonoseki — western tip of Honshu, where Japan's most dramatic medieval sea battle (Dan-no-ura, 1185) ended the Heike clan. The Michi no Eki format makes it an ideal road-trip stop; try Shimonoseki's famous fugu (blowfish) in town before or after your 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 sodium chloride & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.