Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
In Japan, the bathing tradition is a revered ritual that combines relaxation and socialization. Visitors to a traditional onsen immerse themselves in a serene and tranquil atmosphere, surrounded by natural hot springs. Guests are expected to follow strict etiquette, including removal of clothing, washing before bathing, and respecting communal bathing areas. This tranquil experience promotes a sense of calm and community, allowing individuals to unwind and rejuvenate in a peaceful environment.
Insider tip — Fukiage Onsen sits near the western coast of Kagoshima, known for its deeply colored iron-rich water drawn from basaltic rock formations along the Fukiage plains. The spring has long been popular with local farmers and fishermen seeking relief from physical labor. Outdoor rotenburo pools here offer views of the East China Sea on clear days, making sunset the prime bathing hour. The high iron content leaves a faint rust tinge on pale stone edges, a mark of authenticity locals appreciate.