Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Banben Wenquan is a sodium-chloride hot spring located in Tarumizu, Kagoshima Prefecture, Japan. The water reaches around 41°C. The site offers an indoor bath, an outdoor bath (rotenburo), and a sauna.
Insider tip — Banben Wenquan sits in Kagoshima Prefecture at the southern tip of Kyushu, near the base of the active Sakurajima volcano whose ash occasionally dusts the surrounding towns. The sodium-chloride waters reflect the intense volcanic geology of this region, warming visitors thoroughly even on the coolest winter days. Kagoshima's onsen culture is among Japan's most vibrant, with the prefecture counting over 2,700 natural springs — the highest density in the country. Views of Sakurajima rising from Kinko Bay make for an unforgettable backdrop during an outdoor soak.