The island's unique weathered holes, known as 'tafoni', are caused by sea salt crystallization and erosion on volcanic tuff layers.
The island is composed of pyroclastic rocks formed from undersea volcanic eruptions approximately 20 million years ago.
Ebisu Island acts as a natural breakwater for the adjacent Suzaki fishing harbor.
The island serves as a prime location for observing 'Tsunagi-bashi', the bridge connecting it to the mainland, which is often surrounded by clear, azure waters.
The strata visible on the island provide a chronological record of the volcanic events that built the Izu Peninsula.
It is an official site within the Izu Peninsula UNESCO Global Geopark.
Ebisu Island is a small, uninhabited island in Shimoda characterized by its distinct tafoni rock formations created by wave erosion and volcanic activity. It is connected to the Izu Peninsula mainland by a concrete bridge, making it easily accessible on foot. The island features a circular walking trail that traverses coastal cliffs and displays exposed strata of submarine volcanic rocks. These geological formations are part of the Izu Peninsula Geopark, showcasing the region's complex tectonic history. The terrain transitions between rugged rock shores and forested inland paths. Visitors can observe tide pools teeming with marine life along the island's perimeter. The island's strategic location at the entrance to Suzaki Harbor once served as a landmark for local maritime activity. The site remains a primary destination for geology enthusiasts and those seeking coastal scenery away from Shimoda's main beach crowds.
The bridge connecting the mainland to the island, offering a frame of the rugged coastline and deep blue ocean.
Wear sturdy, closed-toe walking shoes as the volcanic rock paths are uneven and can be sharp.
Visit during low tide to safely explore the extensive tide pools and exposed rock platforms.
Bring a hat and sunscreen, as the coastal path is almost entirely exposed to direct sunlight.
Do not attempt to walk along the cliff edges or near the water during high tide or heavy sea conditions, as waves can be unpredictable.
Practice 'leave no trace' principles; do not remove rocks or shells, as this is a protected geopark site.
