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Akishima Onsen Tokyo

Akishima, Tokyo Metropolis, Japan
Akishima Onsen Tokyo
Location
Akishima, 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

Akishima, in the western Tokyo Metropolis along the Tama River, is home to the Yokota Air Base — the largest US military installation in Japan — whose presence has shaped the community's character and economy for decades while the adjacent Tama River waterfront and the traditional Akishima Tanabata festival maintain a distinctive local cultural identity alongside the international military presence. Akishima Onsen Tokyo draws on sodium and bicarbonate thermal waters from the geothermal resources of the western Tokyo Tama River zone, offering restorative baths in a riverside community whose unique character as a Japanese city hosting a major American military base creates a fascinating multicultural spa setting within the western Tokyo metropolitan area. The Tama River levee cycling and walking paths, the traditional Akishima Tanabata Festival celebration among the most colourful in the western Tokyo area, and the unusual cultural coexistence of Japanese suburban life and American military base community make Akishima a distinctively characterful spa destination in western Tokyo Metropolis.

Insider tip — Akishima occupies the Tama River terrace where the broad floodplain begins its transition to the upland Musashino Plateau, and its sento draws bicarbonate water from shallow Pleistocene alluvial aquifers. The mild 40°C alkaline bath has a devoted neighbourhood following, with parents bringing small children who splash in the low-walled shallow section while grandparents occupy the deeper main pool. The facility has been OSM-verified, reflecting its genuine local standing. Akishima's riverside cycling path connects easily to Haijima and Tachikawa for a multi-city bike-and-soak itinerary.
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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).