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Hamura Onsen Tokyo

Hamura, Tokyo Metropolis, Japan
Hamura Onsen Tokyo
Location
Hamura, Tokyo Metropolis, Japan
Water type
bicarbonate
Temperature
40 °C
pH
8

Water profile

Thermicity
Sedative
40 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Restorative
LowHigh

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

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

Hamura, in the western Tokyo Metropolis at the bend of the Tama River where the Yazawa weir channels the river into the Hamura Water Intake facility — one of the key historical infrastructure works of the Meiji period that brought clean water to Tokyo — is a small city of just over 57,000 whose river heritage and traditional Hamura Tanabata Festival create a pleasantly small-town character within the Tokyo metropolitan boundary. Hamura Onsen Tokyo draws on sodium and bicarbonate thermal waters from the geothermal resources of the western Tokyo Tama River zone, providing restorative baths in a riverside community whose Meiji-era water infrastructure heritage, the scenic Tama River Yazawa weir area, and the traditional Tanabata festival decorations create an appealingly modest and human-scale spa setting at the western edge of Tokyo Metropolis. The Hamura Water Intake historic site, the Tama River weir and riverside cycling paths, and the Hamura Tanabata Festival celebrated each August with traditional Edo-period paper decorations create a gently traditional and riverside spa destination at the far western edge of the Tokyo administrative boundary.

Insider tip — Hamura lies at the point where the Tama River exits the Okutama gorge and spreads across the Kanto lowlands, and its sento captures bicarbonate groundwater recharged by the river's upstream volcanic catchment. The smooth, slightly alkaline water at 40°C is a perfect remedy after hiking the lower Okutama trails or cycling the Tamagawa Cycling Road. The bath house here retains a rural warmth unusual for Tokyo, reflecting Hamura's position as the westernmost settled municipality of the metropolis. Late afternoons see rowers and kayakers from the adjacent riverside club mixing companionably with local residents in the changing room.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).