DōKutsu Onsen
洞窟温泉どうくつおんせん
Cave onsen in a river gorge with mixed bathing and open-air pools
Day Use
YesClosed for roughly a week during heavy rain or high water.
Adults 1,500 yen; children (elementary school) 1,050 yen. Towel included. Swimwear required. Hotel guests free.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Cold water plunge bath, typically used after sauna
Bathing Arrangements
Shared bathing area for all genders
Policies & Services
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
Relaxation space for after bathing
On-site or nearby parking available
Views
RiverHighlights
Cave BathAbout
A cave bath carved into a river gorge wall in Kawazu, managed by the nearby Nanataki Onsen Hotel (七滝温泉ホテル). The cave itself is mixed bathing (konyoku, 混浴) with swimwear required; a separate rotenburo (open-air bath) with gender-divided sections sits on the same grounds, along with a Goemon-style cold plunge. The site is a short walk from the hotel and is unmanned. After heavy rain the baths close until the river level drops.
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Last updated September 19, 2026