Dive-site story
Located off the southern coast of Yonaguni Island, this massive submerged sandstone formation features stepped terraces, right-angled ledges, and broad platforms that continue to fuel debates over whether it is man-made or entirely geological. Strong ocean currents sweep past the monolithic structure, requiring drift diving protocols and prompt negative entries from local dive boats. Aside from the striking rock architecture like the Main Terrace and the Loop Road, divers frequently encounter schools of pelagic fish patrolling the surrounding drop-offs.
Massive stepped sandstone terraces and sharply carved underwater rock features
Regular schooling hammerhead shark encounters during winter and early spring
Expansive ocean visibility allowing full appreciation of the colossal stone formations
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Winter brings rougher seas but aligns with peak hammerhead shark aggregations, whereas summer offers calmer boat conditions.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Scalloped hammerhead sharkSphyrna lewini | Seasonal | ||||||||||||
| Bigeye trevallyCaranx sexfasciatus | Common | ||||||||||||
| Whitetip reef sharkTriaenodon obesus | Common | ||||||||||||
| Green sea turtleChelonia mydas | Common | ||||||||||||
| Great barracudaSphyraena barracuda | Common |
Marine forecast
Book with DIVEROUT
