
Itinerary
Read it in the order we travelled.


Spa Metsä Otaka Ryusenji no Yu
Chiba
Natural hot springs, sauna, and cold plunge bath — all absolutely perfect




JAPAN'S FINEST ONSEN & SAUNA
The Finest Onsen & Sauna in Japan
57 SELECTIONS
Most of what we surveyed never even made it onto this site. This book is a further cut from what did. Our editor bathed in every onsen and sauna in it, and wrote only what they confirmed on the ground.

Dec 5–7, 2025 / 2 nights, 3 days
This sauna journey is destined to be etched deeply into my memory as the greatest experience of my life. I had a feeling it would be, even before the trip began — and that feeling proved absolutely right. I repeatedly cycled through sauna, cold plunge bath, and rest sessions at renowned facilities across Tokyo, Kanagawa, Saitama, and Chiba. A legendary sauna adventure that sauna enthusiasts across Japan would envy is about to begin.
Every stop on this itinerary was visited in person by the Editor-in-Chief.
Read it in the order we travelled.


Chiba
Natural hot springs, sauna, and cold plunge bath — all absolutely perfect



