Inazumi Suichu Shonando (Inazumi Underwater Limestone Cave)
Inazumi Suichu Shojyudo
A rare underwater limestone cave preserving memories from 300 million years ago.Explore this spot
Located in Bungo-ono City, Oita Prefecture, Inazumi Suichu Shonando is a limestone cave formed during the Paleozoic era approximately 300 million years ago.
What makes it special
About Inazumi Suichu Shonando (Inazumi Underwater Limestone Cave)
- Enjoy a cool escape: The cave temperature stays at a constant 16°C (61°F) year-round, providing a refreshing break from the heat.
- Safe Exploration: Well-maintained walkways and handrails allow for a safe and comfortable walk through the geological wonders.
- Rare Geological Views: Witness rare phenomena like underwater stalactites and coral stones up close.
- Diverse Activities: Plan ahead for unique experiences like the outdoor sauna, which requires prior reservation and confirmation.
Weather forecast
Tue
8/4
29°/25°
100%
Wed
8/5
32°/24°
45%
Thu
8/6
31°/24°
98%
Fri
8/7
27°/23°
100%
Sat
8/8
29°/23°
93%
Sun
8/9
29°/22°
69%
Mon
8/10
27°/23°
73%
Tips
Payment
Please check on-site for specific payment methods (cash/card) as they vary by facility.
English Support
An English version of the official website is available for more information.
Reservations
Activities such as the outdoor sauna require advance booking.
Clothing
The cave is a constant 16°C (61°F); bring a light jacket or layers to stay comfortable.
Footwear
Wear comfortable walking shoes as paths can be damp or uneven.
Accessibility
While paths are maintained, there may be steps or uneven surfaces; please proceed with care.
Nature Conservation
Please follow all local rules to protect the delicate cave environment.