Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
In a traditional onsen, bathers enter a serene and tranquil environment, seeking relaxation and rejuvenation. A strict code of conduct is observed, with visitors typically shedding their clothing and donning provided slippers. Bathing is often a communal experience, with separate facilities for men and women. A ritual of cleanliness precedes immersion, with scrubbing and rinsing a crucial step before entering the hot spring bath. This ancient tradition emphasizes purification, simplicity, and connection with nature.
Insider tip — 'Yunoyama no Yu' (湯の山の湯 — hot spring mountain spring) at Hayashida Onsen in Asakura city, Fukuoka. Asakura is famous for the Mikuma Water Wheels (三連水車) — Japan's last working triple water wheels on the Yasunoha irrigation canal, a symbol of traditional engineering ingenuity. The city's 'Toho Village' water management system is a UNESCO Irrigation Heritage site. The Hayashida spring sits in the wooded foothills above this celebrated agricultural plain, where water has shaped civilization for a thousand years.