
Photo: Quercus acuta · CC BY-SA 4.0 · Wikimedia Commons
Hakone Onsen is a hot spring town in Kanagawa, Japan. Officially the water is classed as simple spring, chloride spring, bicarbonate spring, sulfate spring and sulfur spring.
Mild and low in dissolved minerals. Usually clear and gentle on the skin, which is why these baths are often recommended for first-timers.
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.
Clear water with a faintly bitter taste. Known for holding heat.
The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.
From Wikimedia Commons. Tap a photo for the photographer and licence.
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.
Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.