Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Anraku Onsen is set in Kirishima, Kagoshima Prefecture, a volcanic region in southern Kyushu. The sulfurous water reaches 44°C here. Indoor bath, outdoor bath (rotenburo) and sauna are accessible to visitors.
Insider tip — Anraku Onsen sits on the volcanic slopes of the Kirishima mountain range in Kagoshima Prefecture, drawing high-temperature sulfurous water from one of Japan's most geologically active regions. The pH-3 acidic spring emerges at 44 degrees Celsius with a strong hydrogen sulfide odour and is traditionally credited with powerful antibacterial and skin-rejuvenating properties. The surrounding Kirishima-Kinkowan National Park offers exceptional hiking across lava fields and crater lakes within minutes of the bathhouse. This remote valley onsen sees far fewer visitors than the famous Kirishima resort hotels, offering a quieter and more elemental experience of Kyushu's volcanic thermal heritage.