Kiyotaki Onsen

Okutama, Tokyo Metropolitan Area, Japan

Location: Okutama, Tokyo Metropolitan Area, 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

Kiyotaki Onsen is a secluded thermal spring in the Hita basin of Oita Prefecture, nestled within one of Kyushu's most historic inland cities — Hita, known as the "little Kyoto of Kyushu" for its well-preserved Mameda merchant district, where Edo-period earthen-walled townhouses line streets beside the clear Mikuma River. The siliceous mineral waters here emerge in a setting of exceptional historical atmosphere, where the carp-filled canals and traditional sake breweries of Hita's merchant quarter create an immersive journey into feudal Japanese commercial culture. Bathing at Kiyotaki Onsen offers visitors a deeply local Oita experience combining mineral wellness with the architectural heritage of this cherished old-town destination.

Insider tip — Kiyotaki Onsen is a rare find on the western fringe of the Tokyo conurbation in the Okutama mountain district, where sodium-chloride water at 41°C surfaces from deep geological formations beneath the Tama River valley. The sento serves hikers returning from the forested ridgelines of the Chichibu-Tama-Kai National Park, providing an authentically Japanese transition from mountain exertion to urban comfort. The sodium-rich water leaves skin feeling noticeably warm and moisturised — the characteristic effect locals call 'bijin no yu' (water of beauty).

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