Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Matsunoyama Onsen Ski-jo lies in Matsunoyama, part of Tōkamachi city in Niigata Prefecture, a mountainous area known for its ski resorts. Sulfurous thermal water emerges at 42°C, supplying an indoor bath, a rotenburo, and a sauna — a fitting stop after a day on the slopes.
Insider tip — Matsunoyama is one of Japan's Nihon Sankomeito (三大名湯) — three legendary springs, alongside Arima and Kusatsu. Its uniquely high-temperature sulfurous water (some sources emerge at 98°C) contains concentrated minerals that have attracted visitors since the Edo period. The ski resort location means you can combine world-class Niigata powder skiing with a legendary soak — the ultimate winter experience.