The island is composed of Izumi Group sandstone layers formed approximately 70 million years ago.
The name 'Onokorojima' links this site to the Nihon Shoki and Kojiki accounts of Japanese creation myths.
The island is home to a small, secluded shrine dedicated to the deities Izanagi and Izanami.
Its unique geological strata were formed through the accumulation of sand and gravel on the ocean floor before tectonic activity raised the land.
The site served as a landmark for sailors navigating the Akashi Strait for centuries.
Eshima is a small, sandstone island located off the coast of Iwaya in Awaji City, designated as a Prefectural Scenic Spot. The island is characterized by its distinctively layered sedimentary rock formations created by geological uplift over millions of years. It is historically significant as the legendary site of 'Onokorojima,' the first island created by the gods in Japanese mythology. A small shrine and a stone monument sit atop the rock formation, accessible via a red bridge that connects it to the mainland. The site offers views across the Akashi Strait toward the Akashi Kaikyo Bridge. Erosion patterns on the island's cliffs provide a visible record of ancient coastal sedimentation.
From the pedestrian walkway near the Iwaya Port breakwater, framing the red bridge and the island together.
Visit during low tide to observe the full extent of the rock base and the erosion patterns at the water line.
Combine this visit with a stroll through the nearby Iwaya seaside park area.
Bring a camera with a wide-angle lens to capture the juxtaposition of the bridge in the background and the rugged island in the foreground.
Attempting to climb the unstable or roped-off rock sections, as the stone is fragile and prone to erosion.
Respect the religious nature of the shrine atop the island; maintain a quiet, contemplative demeanor.
