Mayu Onsen Center; Koryukan
Ichinoseki, Iwate, Japan
- Location
- Ichinoseki, Iwate, 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
Mayu Onsen Center / Koryukan, located in Ichinoseki, Iwate Prefecture, draws sodium-chloride water at 42°C. The bathhouse combines an indoor bath, an outdoor rotenburo, and a sauna.
Insider tip — Mayu Koryukan, the silk cocoon exchange hall, honours the sericulture heritage of Ichinoseki City where silk production shaped the local economy through the Meiji and Taisho eras. Ichinoseki is the southern gateway to the Tohoku onsen corridor and home to the spectacular Geibikei and Genbikei gorges where the Satetsu River carved dramatic volcanic canyon walls used as backdrop for traditional yakata boat excursions.
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.