Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Utto Onsen Matagi no Yu is located in Kitaakita, Akita Prefecture, Japan. Its sodium-chloride thermal water emerges at 41°C. The facility includes an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — 'Matagi no Yu' (マタギの湯 — Hunter's Bath) honors the Matagi — Japan's most ancient hunting culture, practiced for over 1,000 years in the Ani mountains of northern Akita. These bear hunters follow a strict code of conduct, mountain worship, and a specialized dialect. The surrounding Shirakami Sanchi UNESCO World Heritage beech forest (130,000 ha of virgin old-growth beech — the world's largest) shelters Asian black bears, golden eagles, and the elusive Japanese serow.