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Yasato Onsen

Ishioka, Ibaraki, Japan
Yasato Onsen
Location
Ishioka, Ibaraki, Japan
Water type
bicarbonate, carbonated
Temperature
40 °C
pH
6.3

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
High buoyancy
LowHigh

Mineralised water — eases movement and joints.

CO2BicarbonatesMagnésium

Yasato Onsen—Eight Villages Spring or Peaceful Village Spring—takes its name either from the administrative gathering of eight rural communities (yasato) or from the sense of settled, peaceful village life (yasato) that characterizes the spring's agricultural setting in Ibaraki Prefecture, where the volcanic geology that underlies the Kanto plain produces thermal springs amid the paddy fields and vegetable farms of one of Japan's most productive agricultural regions. The bicarbonate and carbonated waters deliver the effervescent, skin-stimulating mineral soak that provides a refreshing therapeutic counterpoint to the physical labor of agricultural work, a spring that has historically served the farming communities of the surrounding villages. This spring's village-gathering name reflects the community-centered character of Japan's rural onsen culture, where thermal springs serve as gathering places for the agricultural communities built around them.

Insider tip — Yasato Onsen emerges on the southern flanks of Mount Tsukuba in Ibaraki Prefecture, where bicarbonate-carbonated spring water rises through Cretaceous granite. This area at the base of Tsukuba — one of Japan's 100 Famous Mountains — has attracted bathers since antiquity, and the naturally effervescent water is prized for its skin-softening and circulatory benefits. The surrounding plateau is blanketed in plum orchards that bloom spectacularly each February.
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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 & carbonated water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).