Usual hours and prices, checked 2026-10-07 against the sources under “What this place is”. They can change for holidays and events — confirm before you go. Official site
Our guide
Inazumi Underwater Cave, in the city of Bungo-Ōno, Ōita, is an underwater limestone cave and the longest underwater cave system in Japan. Our source says little more than that, so this page is short.
We have not checked opening hours, fees or a public-transport route, so check before you go.
Written by japan-spots.com (2026-09-22) from the sources credited on this page. Distances are straight lines between map positions.
Photos
What this place is
Inazumi Underwater Cave (稲積水中鍾乳洞, Inadzumi-Suichūshōnyūdō) is an underwater limestone cave located in Bungo-Ōno, Ōita Prefecture, Japan. It is the longest underwater cave system in Japan.
Visitor information checked: 2026-10-07 · Official visitor information
Background text from Wikipedia (CC BY-SA 4.0)
What to expect at this type of place: Landmark
Getting there
We do not have step-by-step transit directions for this spot yet. Open the location on Google Maps for routes from where you are staying.
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