Genki Onsen; Yao Oyuba

Yao, Osaka, Japan

Illustration photo — not a verified picture of this exact spot.

Location: Yao, Osaka, Japan
Water type: sodium chloride
Temperature: 41 °C
pH: 7.3

Water profile

Thermicity

Sedative

41 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Restorative

LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy

Effortless float

LowHigh

Dense, salty water — you float without effort.

SodiumChloruresBrome

Yao Oyuba, in Yao, Osaka Prefecture, uses sodium-chloride water at 41°C. The bathhouse has an indoor bath, an outdoor rotenburo and a sauna open to visitors.

Insider tip — Oyuba at Yao Onsen serves Yao City in the eastern arc of the Osaka plain where the ancient Kawachi district concentrated the most important iron-forging and silk-weaving communities of classical Japan. Yao City contains one of the largest Kofun burial mounds in Japan — the Kundaniyama Kofun at 154 metres in length — in a concentration of ancient tumuli that documents the extraordinary political power of the Kawachi clan chieftains who controlled the Osaka plain during the Kofun period (3rd-7th century CE).

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