Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
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Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Nakatane-cho Onsen Hoyo Center is a thermal bathhouse in Nakatane, Kagoshima Prefecture, Japan. The sulfurous water reaches around 44°C, with an indoor bath, an outdoor rotenburo-style bath and a sauna.
Insider tip — Perched on Tanegashima Island off Kagoshima, this municipal onsen wellness center draws on the island's volcanic geology to deliver sulfurous waters prized locally for skin-softening properties. Tanegashima is more famous for its space launch facilities, making a soak here an unusual juxtaposition of cutting-edge technology and ancient bathing tradition. The facility serves islanders year-round and offers a genuine, non-touristy onsen experience. Evening visits provide a serene atmosphere as fishing boats return to the nearby harbor.