Jōzankei Onsen
- Location
- Hokkaido -, Japan
- Water type
- sodium chloride
- Temperature
- 60 °C
- pH
- 7.6
Water profile
Relaxing — deep, immediate muscle release.
Loaded with major ions — the essential minerals (Ca, Mg).
Dense, salty water — you float without effort.
In the mountain valley of Jōzankei, carved by the Toyohira River into the forested highlands just south of Sapporo, Hokkaido's capital, Jōzankei Onsen is the island's most accessible escape from urban life — a full hot spring resort town that draws Sapporans year-round and winter visitors from across Japan for the combination of deep snow, autumn maple foliage, and sodium-chloride waters that flow at 60 °C. The high temperature requires careful dilution, and the slightly alkaline pH of 7.6 contributes to the water's renowned body-warming persistence.
Jōzankei's sodium-chloride composition gives it the kaen-no-yu quality — a warmth that penetrates deeply and sustains long after leaving the bath — especially valued in Hokkaido's harsh winters. The surrounding maple and birch forest along the Toyohira gorge creates one of Japan's most celebrated autumn onsen landscapes, while heavy snowfall transforms the valley into a serene white world perfectly complemented by steaming outdoor rotenburo pools.