Aji Onsen is a hot spring town in Kagawa, Japan. The water leaves the ground at 18°C, cool enough that the baths here are usually reheated. Officially the water is classed as radioactive spring. 1 inns take visitors here.
Getting there
From Kyoto / Osakaabout 3 h
CarNot needed
JR PassCovers the train
Train to Takamatsu Station (JR)
Local bus, about 45 min
Fly into Kansai (KIX) or Itami. Times are rough estimates worked out from station locations, not a timetable — check the exact route on Google Maps.
Radioactive spring
The water here
Radioactive spring 放射能泉
Contains trace radon that leaves the water quickly. Also called radium or radon springs.
Places from Wikidata, photographs from Wikimedia Commons. Distances are in a straight line from the town.
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.