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Kuma Onsen Ehime

Kuma, Ehime, Shikoku, Japan
Kuma Onsen Ehime
Location
Kuma, Ehime, Shikoku, 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

Kuma Onsen Ehime is situated in Kumakogen, a highland agricultural town in the mountainous interior of Ehime Prefecture on the Shikoku island, whose elevated plateau — rare in subtropical Shikoku — creates a cool summer climate that supports dairy farming, vegetable cultivation, and even a modest ski resort in winter, making Kumakogen an unexpected destination for skiing enthusiasts on an island more typically associated with warm Pacific coastal landscapes. The Kuma plateau's position in the heart of the Shikoku mountains provides exceptional panoramic views across the island's rugged interior, with the jagged ridgelines of the Shikoku Karst extending to the north in a landscape of limestone outcrops and rare alpine meadows unique in the Shikoku mountain system. The onsen here draw on silica-rich geothermal springs from the volcanic and hydrothermal geology of Shikoku's interior, providing mineral bathing in one of the island's coolest and most scenically elevated highland environments, offering a distinctly different Shikoku experience from the coastal hot spring culture of Matsuyama's famous Dogo Onsen.

Insider tip — Nestled in the forested Kuma River valley of southern Ehime, this mountain onsen draws mildly alkaline bicarbonate waters that leave skin noticeably silky. The area is known as the Tibet of Shikoku for its steep gorges and rural isolation. Visit in autumn when crimson maple canopies frame the bathhouse windows. Locals recommend the outdoor rotenburo tub at dusk for the best valley views.
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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).