Sunayama Beach — Hidden Beach Through Arch

Sunayama Beach (砂山ビーチ, 'Sand Mountain Beach') is a secluded cove accessed by climbing over a large sand dune (the 'mountain'), rewarded by a pristine white-sand beach and a natural rock arch extending into turquoise water. The arch creates a natural frame for sunset photos — the sun setting through the arch's opening is Miyakojima's most iconic image.

The beach is small (100 meters long), shallow, and protected by reefs, making it ideal for calm swimming and wading. However, the same reefs create strong currents in the channel beyond the arch — swimming through the arch is prohibited and dangerous.