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Yagen Valley

Mutsu, Aomori, Japan
Yagen Valley
Location
Mutsu, Aomori, Japan
Water type
sulfurous, acidic
Temperature
44 °C
pH
3.5

Water profile

Thermicity
Sedative
44 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Bio-active
LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Yagen Onsen is a hot spring in the former town of Ohata, now part of Mutsu City in the Shimokita Peninsula of Aomori Prefecture, at the northernmost tip of Honshu, situated within the Shimokita Peninsula Quasi-National Park where the wild and sparsely inhabited landscape of wind-swept moors and ancient beech forests preserves the character of a forgotten corner of Japan. The Shimokita Peninsula, shaped like an axe head pointing into the Tsugaru Strait toward Hokkaido, is famous for the sacred Osorezan, a volcanic crater lake associated in Japanese folk belief with the realm of the dead, where itako shamanic mediums once communicated with deceased ancestors during the annual summer festival. The sulfurous and acidic waters of Yagen Onsen, with their strong volcanic character, complement the otherworldly atmosphere of the Shimokita landscape, providing intensely therapeutic bathing in a region where volcanic energy, sacred tradition, and untouched wilderness combine to create one of the most distinctive environments in all of Japan.

Insider tip — Yagen Valley Onsen lies deep in the old-growth forest of the Shimokita Peninsula in Aomori Prefecture, one of Japan's most pristine wilderness areas. The strongly sulfurous and mildly acidic waters emerge at high temperature from volcanic activity associated with the nearby Osorezan caldera, revered in Japanese Buddhism as an entrance to the afterlife. Free open-air river-rock baths along the valley path are accessible to all, offering a wild bathing experience seldom found this close to civilization. Come in late May when the surrounding beech forests are at their most vivid bright green.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 44 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous & acidic water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).