Yunomine is a quaint little collection of inns tucked into a small valley deep in the heart of the sacred mountains of Kumano. The waters here are said to change color seven times over the course of a day. Yunomine Onsen was discovered about 1,800 years ago, and it is thought to be one of the oldest hot springs in Japan.
Yunomine Onsen is an integral part of the over 1000 year old Kumano pilgrimage tradition. Pilgrims performed hot water purification rituals in these piping hot mineral waters after their long journey in preparation to worship at Kumano Hongu Taisha.