faq.japan-travel.jnto.go.jp · Official Tourism
Official Hokkaido diving context.
Shark Fin
Rocky shore dive with stairs, seaweed beds, and cave swim-throughs.
Scuba DivingFreedivingShoreBeginner
Cave
Shark Fin is a shore-access Hokkaido site near Rankoshi and Iwanai with stairs, parking, toilets, rocky caves, and seaweed-rich pockets.
About Shark Fin
This shore-access dive site on the Hokkaido coast sits near Rankoshi Ocean Road and Iwanai, with a stair entry, nearby parking, and toilets close to the water. The shoreline is rocky rather than sandy, and the underwater terrain mixes cave-like slots, swim-throughs, and seaweed-covered pockets that suit relaxed exploring more than fast drifting. Plan on sturdy footwear, cautious footing, and conservative conditions if the sea is up.
Safety & Access
Site Conditions
Overhead environment
Safety Notes
The shoreline is rocky; suitable footwear is recommended for walking to and from the entry. Take care when swimming into cave areas.
Access Restrictions
Use sturdy footwear for the rocky walk-in, and skip the entry when the sea is rough or the footing is poor.
Legal Notes
Follow local shoreline access rules and dive only when conditions are safe.
Where Is Shark Fin?
Featured Operators
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Local Intel For Shark Fin
Community notes to help plan your visit.
Scuba Diving
Described as suitable for open-water level divers.
Freediving
Identified as a good freediving location.
Snorkeling
Snorkeling can work near the entry in calm conditions, but the rocky walk-in and cave sections make scuba and freediving the better fit.
Wildlife at Shark Fin
Species commonly reported at this site, with direct links into their wildlife guides.
Research Estimate At Shark Fin
Conservative baseline from public research. No community dives logged yet.
Avg. Visibility12m
Access5/5 · Easy entry
Aquatic Life4/5 · Great variety
Facilities4/5 · Good facilities
