Ryuodo
★★★☆☆
(8)
Ryuoh-do Cave on Sado Island’s Ogi Peninsula is a large sea cave nicknamed the “Blue Cave” for its clear waters and glowing blue light. Popular for diving and sea kayaking, it hosts sea slugs, seahorses, and more, offering a magical experience for beginners to intermediate divers.
Ryuoh-do Cave offers nudibranchs, seahorses, manta rays, small crustaceans, and seasonal migratory fish—perfect for close-up marine life observation.
Dive Activity
Potential Wildlife Sightings
Wildlife Sightings are Based on User Generated Content
The image shown is a representative illustration and does not depict every individual animal in this category.
Total number of species approx.: 350
Alamy-Andre Seal
2 Sightings
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The image shown is a representative illustration and does not depict every individual animal in this category.
Total number of species approx.: 300
Shutterstock_DiveIvanov
Squid
1 Sightings
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