Nagaoka Wakamatsu Onsen
Nagaoka, Niigata, Japan
- Location
- Nagaoka, Niigata, Japan
- Water type
- bicarbonate
- Temperature
- 41 °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
Nagaoka Wakamatsu Onsen sits within the urban fabric of Nagaoka, a city that has risen from near-total wartime destruction to become a symbol of Japanese resilience and renewal, celebrated each August with its famous fireworks festival. The sodium-bicarbonate waters are mild and deeply warming, drawing city residents seeking relief from modern stress and the muscle fatigue of daily commuting life. Bathing here connects visitors to a long municipal tradition of public bathing culture central to Nagaoka's communal identity across centuries of hardship and celebration.
Insider tip — Nagaoka Wakamatsu Onsen draws from bicarbonate-rich aquifers fed by snowmelt from the Echigo mountains inland of Niigata. The silky, slightly alkaline water is prized locally for smooth skin and is nicknamed bijin-no-yu, or beauty water. The town of Nagaoka is famous for its summer fireworks festival, so combining an evening bath with the August display makes for a memorable visit. Bring a small towel only; full bath sets are available at the front counter.
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 bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).