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Akiruno Onsen Tokyo

Akiruno, Tokyo (Kanto), Japan
Akiruno Onsen Tokyo
Location
Akiruno, Tokyo (Kanto), 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

Akiruno, in the western Tokyo Metropolis along the Akigawa River tributary of the Tama River, is a small forested city that serves as the last suburban community before the Hinohara and Okutama mountain wilderness, where the clear Akigawa River valley, traditional satoyama farmland, and the Hinohara Tomin no Mori forest recreation area create an outdoor wellness culture close to the Tokyo metropolitan edge. Akiruno Onsen Tokyo draws on sodium and bicarbonate thermal waters from the geothermal resources of the western Tokyo mountain fringe, providing restorative baths in a river valley community whose position at the gateway to the Hinohara and Okutama wilderness, the Akigawa River valley farming and forest landscape, and the traditional mountain vegetable cuisine of the Tokyo western highlands create a genuinely refreshing and outdoors-connected spa experience. The Akigawa Valley clear-river hiking and barbecue culture beloved by Tokyo outdoor enthusiasts, the Hinohara Tomin no Mori forest recreation area, and the traditional Okutama mountain village culture accessible from the Akigawa road create an appealing mountain-gateway spa destination at the western edge of Tokyo Metropolis.

Insider tip — Akiruno lies in the Akikawa valley at the foot of the Okutama highlands, one of the greener pockets remaining within Tokyo Metropolitan boundaries. Its bicarbonate thermal water is tapped from sedimentary layers and remains pleasantly mild at 40 degrees. The surrounding cedar and cypress forests make early-morning bathing here feel more like a mountain retreat than a city bath.
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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).