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Hakone ryokan with a private open-air bath in the room

A room with its own open-air bath (露天風呂付客室) is the most private way to enjoy Hakone's hot springs. Each property on this page sells rooms with their own open-air bath; where the website says every room has one, we mark it 'all rooms'.

This is a filtered view of our Hakone private-onsen guide: 18 of the 22 verified properties match.

What our verified data shows for ryokan with an open-air bath in the room in Hakone

18 of the 22 verified properties in Hakone make this list. 18 of them (about 100%) sell rooms with a private open-air bath, and 4 say every room has one. 13 have private kashikiri baths and 2 charge a fee. Where a fee is stated, it ranges from ¥1,500 to ¥3,000. For booking, 5 take advance reservations and 1 is first-come, first-served; the rest don't say. 9 mention free-flowing (kakenagashi) spring water. None explicitly state that tattoos are allowed, while 3 say tattoos are not allowed in the shared baths.

Notable properties in Hakone

• Open-air bath in every room: Hakone Kowaki Sono Tenyu, Odakyu Hotel Hatsuhana and KAI Sengokuhara.
• Most private baths: Onsen Tenseien (12), followed by Hakone Kowaki Sono Tenyu (8).
• Mt Fuji views confirmed: Takumi No Yado Kasho.

Counts come from each property's official website; anything not stated is left out. Policies change, so confirm before booking.

Showing 18 of 18 properties. Click a column heading to sort. "Not stated" means the official website doesn't say, so we haven't assumed anything.

PR Rakuten Travel prices are Rakuten's lowest-rate estimates per room per night for the cheapest plan (which may be for one guest without meals), including tax and service charge, as of 18 October 2026. Rooms with their own bath usually cost more. Supported by Rakuten Developers

Compare-price links go to Agoda, Trip.com, Booking.com and Rakuten Travel. We may earn a commission if you book, at no extra cost to you; it never affects which facts we show. Details.

What a Hakone rotenburo room includes

An open-air bath in the room is usually on a balcony, terrace or small garden, filled with hot-spring water or, at some properties, ordinary heated water. You can soak whenever you like for the whole stay, which is why these rooms are popular for special trips. Sizes vary from a compact tub for two to a large stone or cypress bath with a view of the valley.

Look at the water source. Some properties say their baths use free-flowing spring water (源泉掛け流し); others don't say, or note that water is heated or recirculated. Our property pages show what each website states.

All rooms or some rooms?

Most Hakone properties sell only a few rooms with an open-air bath, as a premium category. A smaller number say every room has one, which means any booking gets you a private bath. When a property only has some, choose the room type carefully on the booking site: the name usually mentions 露天風呂付 or 'with open-air bath'.

How to choose and book

Decide on the area first: Yumoto for convenience, Gora and Miyanoshita for mountain views, Sengokuhara and Lake Ashi for quiet. Then compare room types with the same plan (with or without dinner) across Agoda, Trip.com and Booking.com, including taxes and cancellation terms. Rooms with open-air baths sell out first at weekends.

If the price is too high, an inn with free private baths is the next best option; see our Hakone couples list and the full Hakone guide.

Related private onsen guides

• Private onsen in Hakone
• Ryokan for couples with a private onsen in Hakone
• Onsen near Tokyo
• Onsen near Haneda Airport
• Onsen near Narita Airport
• Tattoo-friendly onsen in Japan
• Ryokan with a Mt Fuji view
• How kashikiri private baths work

Frequently asked questions