Photo: Li04ig27 · CC BY-SA 4.0 · Wikimedia Commons

Kawatana Onsen

Yamaguchi · 川棚温泉

Kawatana Onsen is a hot spring town in Yamaguchi, Japan. The water leaves the ground at 42.8–43.6°C, hot. It measures pH 7.9–8.1 — mildly alkaline, the slippery kind. Officially the water is classed as chloride spring and radioactive spring. 6 inns take visitors here.

Chloride springRadioactive spring

The water here

Chloride spring 塩化物泉

Salty water. The salt leaves a thin film on the skin, so you stay warm well after leaving the bath.

Radioactive spring 放射能泉

Contains trace radon that leaves the water quickly. Also called radium or radon springs.

The numbers

Water temperature: 42.8–43.6°C
pH: 7.9–8.1 (mildly alkaline)
Inns: 6
Address in Japanese: 山口県下関市豊浦町川棚 {{Location map many | Japan Yamaguchi Prefecture | relief = 1 | capt

Figures from the town's Japanese Wikipedia article.