Negoya-jo Onsen; Negoya no Yu
Nakanojo, Gunma, Japan
- Location
- Nakanojo, Gunma, Japan
- Temperature
- 43 °C
- pH
- 6.5
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Negoya-jo Onsen, known as Negoya no Yu, is located in the town of Nakanojo, Gunma Prefecture. Its sulfurous thermal water reaches 43°C (pH 6.5), with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — The Negoya-jo (Negoya Castle) area in the Agatsuma River valley holds the ruins of a mountain castle that controlled the strategic river corridor between the Gunma plain and Nagano's Shinshu highlands. The Negoya no Yu draws sulfurous waters from the same volcanic system as the famous Kusatsu Onsen — Japan's most acidic spring, just upstream in the volcanic highlands. The Yagizawa Dam and reservoir create a striking lake in this volcanic valley, surrounded by the sulfurous steam that characterizes all Agatsuma spring waters.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 43 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.