dive-in-japan.com · Dive Directory
Nudibranch-heavy destination context.
W Arch
Shallow Miyako arch dive with strong photo appeal.
Scuba DivingBoatBeginner18m
CaveReef
Boat-access arch dive on Irabu Island; plan for shallow topography, moderate current, and macro life rather than pelagic action.
About W Arch
W Arch is a boat-access arch dive on Irabu Island in Miyako, with a shallow reef-edge profile, a heart-shaped main arch viewed from below, and a smaller arch plus cave pocket behind the reef. It is more about topography, light, and macro life than big-fish hunting, and the best dives are the ones where the team can pace the route slowly and hold a clean position under the openings.
Safety & Access
Site Conditions
Overhead environment
Safety Notes
Treat it as a cave-style arch dive: hold neutral buoyancy under the roof, avoid crowding the openings, and stay within the team's planned route.
Access Restrictions
Boat access only; the arch and cave pockets are underwater, so it is not a shore-entry site.
Legal Notes
Follow guide briefings on the reef edge because the site is a popular cave-style topography point.
Where Is W Arch?
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Local Intel For W Arch
Community notes to help plan your visit.
Scuba Diving
Boat dive with a heart-shaped main arch, a smaller arch, and a cave pocket behind the reef; slow pacing rewards the best viewing.
Freediving
Not a freedive-first site because the main feature is an underwater arch system.
Snorkeling
The attraction is below the surface, so casual snorkeling is not the main use case.
Wildlife at W Arch
Species commonly reported at this site, with direct links into their wildlife guides.
