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Aizankei Onsen

Hokkaido · 愛山渓温泉

Aizankei Onsen is a hot spring town in Hokkaido, Japan. The water leaves the ground at 44.2°C, hot. It measures pH 6.3 — close to neutral. Officially the water is classed as bicarbonate spring and sulfate spring. 2 inns take visitors here.

Bicarbonate springSulfate spring

The water here

Bicarbonate spring 炭酸水素塩泉

Smooth, slightly slippery water. Often nicknamed bihada-no-yu, the water for beautiful skin.

Sulfate spring 硫酸塩泉

Clear water with a faintly bitter taste. Known for holding heat.

The numbers

Water temperature: 44.2°C
pH: 6.3 (close to neutral)
Inns: 2
Address in Japanese: 北海道上川郡上川町字愛山渓 {{Location map | Japan Hokkaido | relief = 1 | caption = | width =

Figures from the town's Japanese Wikipedia article.