Reisenzan Onsen is a hot spring town in Nagano, Japan. The water leaves the ground at 42°C, hot. Officially the water is classed as sulfate spring. 8 inns take visitors here.
Clear water with a faintly bitter taste. Known for holding heat.
With tattoos
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.