For travelers who want both a hot spring trip and a proper sauna session, here's how Hakone's sauna scene works.
See Hakone private-onsen ryokan →Types of ryokan saunas
Options range from a sauna attached to the communal bath, to a löyly steam sauna, to a private barrel sauna in your room. Ryokan with a cold plunge and outdoor rest area make it easier to fully 'totonou' (reach that post-sauna state of calm).
Hakone ryokan with a sauna
Aitayo tracks ryokan with a sauna at this list. Pair one with a private open-air bath and you can move between hot spring and sauna as much as you like.
FAQ
Which Hakone ryokan have a sauna?
Aitayo tracks them at /tag/sauna. Some offer löyly steam or a private barrel sauna.
Is there a cold plunge or outdoor rest area?
It varies by ryokan. If you want to fully 'totonou', check whether a cold plunge and outdoor rest area are available.
Last updated: 2026-07-17 ・ Reservations are on Rakuten Travel (Japanese site).