Tochigi Nasu Yumoto Onsen
- Location
- Nasu Yumoto, Tochigi, Japan
- Water type
- sulfurous
- Temperature
- 44 °C
- pH
- 6.5
Water profile
Relaxing — deep, immediate muscle release.
Rich in active gases or metals — a strong mineral character.
Soft water — natural, classic buoyancy.
Tochigi Nasu Yumoto Onsen is located in the Nasu highlands of Tochigi Prefecture, in the volcanic area near the active Nasudake volcano — a designated scenic mountain of Japan whose fumarolic steam can be seen from the surrounding highland plateau, a popular resort area for Tokyo's urban population seeking highland air and natural hot springs just two hours from the capital. The intensely sulphurous waters of Nasu Yumoto are classified among Japan's most powerful sulphur springs, producing white milky water with a distinctive hydrogen sulphide character, and have been flowing from the same volcanic vent for over 1,300 years according to historical records. The Nasu area is home to the imperial family's summer villa (Nasu Geihinkan), making it one of the most exclusive highland resort areas in Japan, and the combination of imperial connections, active volcanology, and powerful sulphur waters within a long thermal tradition makes Nasu Yumoto one of Tochigi's most prestigious and geologically dramatic onsen destinations.