en.marinediving.com · Operator
Dive-center overview for Yonaguni and Hammerhead Rock.
Hammerhead Rock
Yonaguni drift dive for hammerheads and big pelagics.
Scuba DivingBoatAdvanced35m
PinnacleWall
Open-water drift site off Yonaguni with vertical rock formations, swift current, and regular hammerhead action.
About Hammerhead Rock
Hammerhead Rock is a boat dive off Yonaguni in Japan, known for schools of hammerhead sharks and other large pelagics. The site is defined by vertical rock formations that rise from the seabed and by open-water drift conditions that make timing and guide discipline important. It is a classic specialty dive for experienced divers rather than a casual reef stop.
Safety & Access
Site Conditions
Strong current
Safety Notes
The site is deep, current-prone, and centered on large-shark encounters, so appropriate training, gas planning, and situational awareness matter.
Access Restrictions
Boat access and guided drift timing are standard.
Legal Notes
Follow local operator instructions and dive-briefing limits.
Where Is Hammerhead Rock?
Featured Operators
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Local Intel For Hammerhead Rock
Community notes to help plan your visit.
Scuba Diving
A deep open-water scuba dive centered on vertical rock formations and hammerhead encounters.
Freediving
Not a freedive-first site; the hammerhead zone is better handled on scuba.
Snorkeling
Not a casual snorkel site; the action is deeper and current-driven.
Wildlife at Hammerhead Rock
Species commonly reported at this site, with direct links into their wildlife guides.
Research Estimate At Hammerhead Rock
Conservative baseline from public research. No community dives logged yet.
Avg. Visibility50m
Access4/5 · Simple entry
Coral2/5 · Some damage
Aquatic Life5/5 · Exceptional variety
Facilities3/5 · Basic facilities
Crowd / PopularityModerate
CurrentStrong current
SurgeFlat calm
