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Sounkyo Onsen Grand Hotel

Sounkyo, Hokkaido, Japan
Sounkyo Onsen Grand Hotel
Location
Sounkyo, Hokkaido, 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

Sounkyo Onsen Grand Hotel is set deep within the dramatic basalt gorge of Sounkyo in the Daisetsuzan National Park — Japan's largest national park encompassing the vast volcanic interior of Hokkaido — where sheer volcanic cliffs rising 150 meters, seasonal waterfalls of extraordinary power, and autumn foliage of intense crimson and gold surround the secluded onsen village. Chloride-rich hot spring water from volcanic sources beneath the Daisetsuzan massif fills the grand hotel's indoor and outdoor rotenburo baths, offering the rare experience of soaking within one of Japan's most awe-inspiring volcanic canyon landscapes far from any urban center. The gorge is famous for two spectacular waterfalls — Ryusei (Shooting Star) and Ginga (Milky Way) — visible from hiking trails that begin directly from the onsen village and lead into the untouched wilderness of the volcanic interior where brown bears and red foxes roam. With its dramatic scenery, isolation, and the raw power of Daisetsuzan's volcanic peaks, Sounkyo Onsen represents the quintessential northern Japan onsen experience — surrounded by wild nature, immersed in mineralized volcanic warmth, far from civilization.

Insider tip — Sounkyo Onsen is nestled deep within the Daisetsuzan National Park gorge, where sheer basalt cliffs rise 150 meters on both sides of the Ishikari River. The sodium-chloride waters at 41°C warm visitors arriving from the frozen gorge trails, which host Japan's longest ski season and stunning ice waterfalls in winter. Grand hotel ryokan-style service here pairs multi-course kaiseki meals with expansive rotenburo (outdoor baths) overlooking the canyon. Autumn foliage in October paints the canyon walls in brilliant crimson and amber.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).