Onsen with a private bath
You have the bath to yourselves — no other bathers. It's the easiest way in if you have a tattoo, if you'd rather not undress in front of strangers, or if you're bringing children.
“Has a private bath” and “you can book it without staying” are two different facts.
onsen pass checks them separately.
What we check
- Whether you can book the private bath alone, without staying overnight
- Whether you book online, by phone only, or first-come on the day
- Whether you can book it with a tattoo
Areas

Hakone
About 85 minutes from Shinjuku on the Odakyu Romancecar
Sapporo
About 40 minutes from New Chitose Airport to Sapporo Station on the JR Rapid Airport
Beppu, Kusatsu and Tokyo are next.
We work through them one onsen at a time, so it takes a while. Each area goes live once its checks are done.
What we don't check
We don't check same-day availability, how busy it is, unscheduled closures, how many private-bath slots are left and the final price of a private bath. Policies can change without notice — please confirm with the onsen when you book and when you arrive. onsen pass provides information only: we don't make bookings, and we can't guarantee you entry.
At most onsen the price of a private bath changes with the room type, the day of the week and the season, so we don't keep a price list. Check the amount through the official-site link on each onsen's page.
For the water's stated health effects and contraindications, please read the notices posted at the onsen — we don't cover them. You can report an error in anything listed here.