Umegashima Onsen Yumotoya; Niji no Yu
Umegashima, Shizuoka, Japan
- Location
- Umegashima, Shizuoka, Japan
- Water type
- sulfurous
- Temperature
- 43 °C
- pH
- 6.5
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Umegashima Onsen Yumotoya Niji no Yu is located in Umegashima, Shizuoka Prefecture, a mountainous area. Sulfurous water surfaces at 43°C, feeding an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — In the remote Umegashima mountain village of Shizuoka — Japan's most celebrated wasabi-growing region where pristine mountain streams cascade through verdant terraces — Niji no Yu (rainbow waters) earns its name from the sulfurous steam that catches mountain light; the Yumotoya inn tradition here dates back centuries, making this one of the Shizuoka mountains' most atmospheric retreats.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 43 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.