Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
In Japan, a traditional bathing tradition revolves around communal hot spring baths, known as onsen. Guests typically remove their clothing and wash thoroughly before entering the bath. Modesty is observed, and some establishments require bathing attire or towels to be worn while in the bath area. The bathing tradition emphasizes relaxation, purification, and social bonding, often accompanied by a serene and natural atmosphere. Personal grooming and cleanliness are highly valued in this cultural practice.
Insider tip — Korei-sha Onsen Koryukan is a community bathhouse in Shizuoka City drawing a sulfurous thermal spring from the geothermal zone influenced by the Izu-Tokai volcanic arc. The facility is run as a seniors-oriented wellness center, reflecting the Japanese tradition of shared bathing for active aging. The sulfur content is moderate, giving the water a gentle, soothing character. Mount Fuji is visible from higher ground nearby on clear winter days, adding a scenic dimension to the visit.