Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Oura Onsen, in Yakushima, Kagoshima, is a Japanese thermal bathhouse with sulfurous water. The water emerges at around 46°C. The bathhouse offers an indoor bath, an open-air bath (rotenburo) and a sauna. A quiet wellness break away from the bustle.
Insider tip — A hot spring on Yakushima island — the UNESCO World Heritage site famous for ancient yakusugi cedar trees and the inspiration for Studio Ghibli's Princess Mononoke. Oura ('big bay') Onsen sits on the island's coast with sea views. Combine with a dawn hike to Jomon Sugi, the 7,000-year-old cedar.