Fudonoyu
A hypotonic, mildly alkaline simple hot spring drawn from 1000m underground. It has an indoor bath with spring water at 36.5 degrees, close to body temperature, so you can enjoy a long soak without getting tired.
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.