Private onsen (kashikiri): how to book and what it costs

A private onsen bath, called kashikiri-buro (貸切風呂), is a bath you reserve for a set slot and use with your own group only. Book at check-in or in advance; slots usually run 40 to 60 minutes. Mixed-gender couples can share one. The Japan Tourism Agency says tattooed guests can use private baths, though Hakone Yuryo bars tattoos in its private baths too. Beppu Hyotan publishes a full price ladder; most other venues publish none.

How do you book a private bath?

1. Check who the bath is for. Day-trip access is often limited to overnight guests, according to a ryokan-booking guide that uses Kurokawa as its example. Ask whether non-guests can book.
2. Book at check-in or ahead. Both routes exist, per the same guide.
3. Ask the price and how to pay. An extra fee is common and cash may be needed. The same guide says the price is per slot for the whole party, not per person, and tells readers to confirm.
4. Pick a slot length. Slots usually run 40 to 60 minutes, per that guide. Beppu Hyotan sells 60, 75 and 90.
5. Check what the online booking includes. Some listings give you a town bath pass (Kinosaki’s seven baths is the guide’s example) instead of access to a private bath in the inn.

If you have a tattoo, mention it when you book. The agency says private baths are fine, but Hakone Yuryo bars tattoos in its private baths, so ask.

A message that covers the basics: “Hello. I would like to reserve a private bath (kashikiri-buro) for [number] people on [date]. How long is a slot, what does it cost, and can I pay by card?” The Japanese term 貸切風呂 is also the one to search for on Japanese-language booking pages.

What does a private bath cost?

Few venues publish a private bath price, so this table lists what each official page gives. No private bath price is published for Nozawa or Zao; Snow onsen towns covers those villages. Dollar figures use about ¥155 to US$1 and are rounded; you pay in yen, so check the rate.

Beppu Hyotan has the only full price ladder here: each extra 15 minutes adds $4 (¥600). Because the price is per slot, a full party splits it, so three adults pay $5 (¥800) each for 60 minutes. A solo guest pays the full slot. For comparison, its main bath day ticket is $7 (¥1,160) for an adult.

Hyotan calls its private baths family baths and opens at 9:00.

Watch the word “private”. A rented hall or rest room, as at Gozanoyu and Tenzan, gives you space to sit but no bath of your own.

One ryokan-booking guide gives a wider range: free to about $32 (¥5,000) per slot, with $6 to $19 (¥1,000 to ¥3,000) typical and free at many mid-range and budget inns. That guide is not an official source and its figures conflict between pages, so read them as a range, not a quote.

To verify One guide says “per slot, not per person”. Ask the inn which one applies.

Who can use a private bath?

Solo guests, couples and families can all use one. A reserved bath is exclusive to your group for the booked time, so mixed-gender couples are permitted. Beppu Hyotan prices its family bath for up to 3 adults and adds fees for extra adults and children.

Tattoo rules differ by venue: the Japan Tourism Agency says tattooed guests can use private baths, and Hakone Yuryo bars them. The short answers are in Can I use a private onsen bath alone or as a couple? and Can I go in an onsen with a tattoo?, and the longer one is Tattoos and onsen.

What is an in-room bath, and does it count?

An in-room bath comes with the room you book. Many ryokan have rooms with their own bath, some open-air, though not all. It is private by design, so the tattoo and couple answers above should apply. No price is published for in-room baths, so ask for the surcharge at booking. More on inns in Ryokan.

To verify Slot length, fee and payment method (including whether cash is required) differ per venue and can change. Confirm each when you book, and check the official page before you go.

Next: Onsen etiquette if you will also use a shared bath, and the Onsen hub for everything else.