Bessho Onsen Aisome no Yu
Ueda, Nagano, Japan
- Location
- Ueda, Nagano, Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Bessho Onsen Aisome no Yu, in the historic hot spring district of Ueda, Nagano, draws bicarbonate water at 40°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Aisome no Yu at Bessho Onsen serves the ancient thermal village of Bessho in Ueda City — called Japan oldest onsen of Shinano province, where Emperor Jomei reportedly bathed in 631 CE during an imperial progress. The Bessho Onsen village preserves extraordinary Kamakura-period Buddhist architecture including the Kitamuki Kannon temple, a Zenko-ji annex, and the unique three-story pagoda of Anraku-ji — collectively the densest concentration of 13th-century religious buildings in Nagano Prefecture, attesting to the spiritual importance of this mountain thermal valley during the Kamakura Buddhist revival.
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 bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.