Ishigaki dive-point roundup that includes Sakieda Big Arch in the northern group.
Japan · Ishigaki and Iriomote
Boat-access arch dive with sunbeams and snapper schools.
Boat-access arch dive with sunbeams and snapper schools.
Sakieda Big Arch is a boat-access topography dive on the western Ishigaki side, built around a large natural arch that throws sunbeams through the ceiling cracks when the light is right. Gentle currents, a shallow coral fringe, and schools of snapper make it a comfortable choice for newer and experienced divers, while winter-spring shrimp spawning adds a seasonal reason to plan the trip.
Site Conditions
Safety Notes
Keep spacing inside the arch and watch overhead clearance when the light beam route is busy.
Access Restrictions
Boat access only.
Community notes to help plan your visit.
Scuba Diving
A comfortable arch dive for newer and experienced divers, with good light and a shallow profile.
Freediving
Not a primary freedive site; the main arch sits below easy snorkel range.
Snorkeling
Only the shallowest edges are practical; the main arch is a scuba target.
Species commonly reported at this site, with direct links into their wildlife guides.
Conservative baseline from public research. No community dives logged yet.
Last Updated
Research Sources
Ishigaki dive-point roundup that includes Sakieda Big Arch in the northern group.
Ishigaki topography-diving context and the arch as a fish-gathering site.
Operator dive-log context and Sakieda Big Arch weather/current mention.
Western Ishigaki arch description and beginner-friendly framing.

Shallow coral maze with arches and tunnels near Sakieda.

Boat-only Kabira drop-off with thick gurukun schools.

Under The Okganzaki Lighthouse is a boat dive with maze-like lava terrain.