Naganuma Onsen Poppo no Yu
Sakata, Yamagata Prefecture, Japan
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- Location
- Sakata, Yamagata Prefecture, 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
Naganuma Onsen Poppo no Yu is located in Sakata, Yamagata Prefecture, supplied by sodium-chloride water at 41°C. Facilities include an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Naganuma Onsen Poppo no Yu sits in the agricultural flatlands of Yamagata near the Sea of Japan coast, drawing saline thermal water from deep below the rice paddies. The name Poppo — evoking a locomotive's steam — captures the vigorous billowing of steam from the mineral-rich water. Salt content in the water promotes perspiration and warming, ideal after the biting Tohoku winter winds off the Nihonkai. Local farmers and fishermen have relied on this facility for generations as a post-work restorative.
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 (idéal automne-hiver).