Tenseien
天成園
Rooftop open-air baths at a big Hakone-Yumoto ryokan
Day Use
YesDay-use bathing runs on an almost round-the-clock schedule, with last entry at 8:00 the following morning.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Bathing Arrangements
A private bath you can reserve for yourself or your group
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Welcomes children and families
Minors alone need a guardian's consent form; children of middle-school age or younger may not use the facility unaccompanied; children still in diapers may not use the main baths.
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
On-site or nearby parking available
Views
Mountains
RiverHighlights
Jet Bath
Lukewarm BathAbout
Tenseien (天成園) is a large ryokan in Hakone-Yumoto that leans hard into day-use bathing as well as overnight stays. The signature bath is a wide open-air pool on the rooftop, with views over Hakone's mountains. There's a second rotenburo on the river side (one section has jets), plus an indoor bath with smooth, alkaline water; it runs a little on the cool side, but a slow soak still warms you through. Add a sauna, kashikiri (貸切) private baths, and guest rooms with their own open-air bath. The garden has a small waterfall and a branch shrine of Hakone's Kuzuryu (九頭龍) shrine, with carp and ducks you can feed.
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Last updated September 19, 2026