Yamada Onsen is a hot spring town in Okinawa, Japan. The water leaves the ground at 23.4°C, cool enough that the baths here are usually reheated. Officially the water is classed as chloride spring, bicarbonate spring and sulfur spring. Its sources put out around 1,500 litres a minute.
Salty water. The salt leaves a thin film on the skin, so you stay warm well after leaving the bath.
Smooth, slightly slippery water. Often nicknamed bihada-no-yu, the water for beautiful skin.
The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.

Places from Wikidata, photographs from Wikimedia Commons. Distances are in a straight line from the town.
Many public baths still turn away visible tattoos, and the rule is set by each bath, not by the town. The reliable way round it is to bathe privately: a room with its own open-air bath, or an inn with a private bath you can book for yourselves.



Figures from the town's Japanese Wikipedia article.
26.4356, 127.7878 — open the map
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.