Radium Mineral Spring (Kiseki-no-Yu)
An artificial hot spring made with radium ore quarried in Hirukawa Village, Gifu Prefecture. The ionizing effects of radon and thoron are expected to help improve skin condition and relieve fatigue.
JAPAN ONSEN COLLECTION
When your heart unwinds,
The Finest Moment
Japan's Finest Onsen & Sauna
43 Extraordinary Destinations
43
A curator who has visited over 300 facilities nationwide handpicks 43 exceptional ones they wholeheartedly recommend. The only guidebook that deeply explores the allure of onsen and sauna—plus culture and etiquette.