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Yasu Onsen

Yasu, Shiga, Japan
Yasu Onsen

Illustration photo — not a verified picture of this exact spot.

Location
Yasu, Shiga, Japan
Water type
silica
Temperature
42 °C
pH
7.2

Water profile

Thermicity
Sedative
42 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Balancing
LowHigh

Rich in trace elements — gentle on the skin.

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

SiliceSodiumBicarbonates

Yasu Onsen is a community thermal facility in the city of Yasu in central Shiga Prefecture, positioned along the southern shore of Lake Biwa where the city's waterfront promenades and the gentle agricultural hinterland of the Yasu River valley create a characteristic Japanese lakeside landscape of rice paddies, fishing boats, and seasonal wildflowers. The siliceous mineral waters draw from deep underground layers beneath the Shiga basin, providing warm, skin-conditioning immersion that serves both local residents and visitors exploring the lake's southern shoreline. Yasu's lake-facing character, its Biwa-ko Marathon race route, and the surrounding Shiga satoyama countryside give this onsen a pleasant, nature-oriented identity on the eastern flanks of Japan's great inland sea.

Insider tip — Yasu Onsen occupies the green agricultural plain between Lake Biwa and the Suzuka foothills, where hot water surfaces through deep silica-rich bedrock. The baths are fed by a single artesian well; the water feels distinctly soft on the skin compared to nearby mineral-heavy springs. Local ryokan serve freshwater eel from the lake alongside the bathing experience. The surrounding lotus fields bloom in July, adding a vivid seasonal dimension to any visit.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 42 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features silica water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).