Yuyu no Mori Onsen; Aiai Hirata
Sakata, Yamagata, Japan
- Location
- Sakata, Yamagata, Japan
- Water type
- sodium chloride
- Temperature
- 42 °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
Yuyu no Mori Onsen, or Aiai Hirata, lies in Sakata, Yamagata prefecture, near the Sea of Japan coast. Sodium-chloride water here reaches 42°C between an indoor bath and a rotenburo, with a sauna.
Insider tip — Sakata, a historic Sea of Japan port that once grew rich on the northern shipping route, provides a culturally rich setting for this woodland spa. Combine your visit with the elegant Homma Museum and fresh seafood from Sakata fishing harbour.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 42 °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.