Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
A traditional onsen bathhouse is a serene retreat where individuals come to relax and unwind. This ancient bathing tradition emphasizes communal respect, modesty, and purification. Visitors typically disrobe and wash before entering the bathing area, where they can soak in warm, mineral-rich waters. The tranquil atmosphere fosters a sense of calm, and the simple, natural surroundings promote a connection with nature. The onsen experience encourages guests to let go of daily worries, rejuvenate their spirits, and find inner peace.
Insider tip — Kamiono Onsen Minshuku Chikatsuyu Hisui no Yu sits deep in the ancient Kumano pilgrimage forest of Wakayama Prefecture, offering sulfurous spring baths to weary walkers on the Nakahechi route. The jade-green water — hisui meaning jade — is fed by volcanic hydrothermal activity beneath the Kii Peninsula mountains. Staying at the attached minshuku allows a private evening bath under the cedar canopy with absolute silence around you. The combination of pilgrimage atmosphere and wild thermal bathing is profoundly restorative.