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Inazumi Underwater Limestone Cave稲積水中鍾乳洞


The Inazumi Underwater Limestone Cave was formed 300 million years ago in the Paleozoic era, and took its current form after being submerged in the Aso volcano eruption 300,000 years ago. It is one of the world’s more unusual underwater limestone caverns, replete with underwater stalactites, coral stones and helictites. It is possible to walk around and see inside of the caves. The sound of water trickling down with quiet echoes into the “reverb pond” and the sight of the beautiful green “emerald spring” are mysterious wonders not be missed.

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place Oita Pref. Bungoonoshi Miemachinakaduru 300
phone 0974262468

Review of Inazumi Underwater Cave

TripAdvisor Traveler Rating
Reviewed:2014/11/10 W-O-W
This cave is so interesting! Bring a GOOD jacket and get ready for wandering through this underground treasure trove. My friends walked quicker then I would have alone, I could have stayed longer! I...
Reviewed:2013/07/10 Spectacular underwater cave, absolutely Amazing!!
Inazumi Underwater Cave started over 300 million years ago, the cave formation began 300,000 years ago, and around 85,000 years ago the cave was submerged by the major eruption of Mt.Aso. In 1976...
Reviewed:2013/04/04 There are no words
We went to Inazumi underwater cave expecting an underwater cave...and we got a whole lot more! After paying the 1000yen entry (reduced from 1200yen because we were given coupons at the nearby...



Oita Pref. Bungoonoshi Miemachinakaduru 300 [map]



9:00-17:00 (extended operation in summer)
open everyday
[Admission feeFriday] Adults 1,300 yen, Junior and senior high school students 1,000 yen, Elementary school Students 700 yen from 4 years old
Parking Lot
Credit Card
Not available

Information Sources:  NAVITIME JAPAN


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Oita Main Areas


A trip to Oita is tantamount to a long soak in the Beppu baths. The mountainous, coastal prefecture of Oita is renowned for having more onsen than any other prefecture in Japan, most of which lie in the city of Beppu on the west coast of Kyushu, recognizable by its pungent sulphuric aroma and the clouds of steam that puff up across the hillside. Away from the Beppu hot springs await mountains, waterfalls, and temples, so don't hesitate to explore Oita a little further.