The park's coastline contains rare exposed strata dating back to the Miocene epoch.
The jagged rock formations are known locally as 'onigashima' or demon island due to their sharp, irregular profile.
It is a popular location for observing migratory birds during the spring and autumn seasons.
The park provides one of the few unobstructed, low-angle views of Sagami Bay in the Miura Peninsula region.
The shoreline rock platforms are biologically diverse, serving as a primary habitat for various species of crabs and sea anemones.
Arasaki Park is a coastal nature reserve located on the Miura Peninsula, featuring jagged volcanic rock formations and tidal pools. The park is characterized by its dramatic cliffside trails that offer expansive views of Sagami Bay and Mount Fuji on clear days. Geologically, the area is known for its exposed sedimentary layers and complex rock strata. A pedestrian path traverses the shoreline, connecting various observation points and weathered geological features. The site serves as a local hub for tide-pooling and coastal observation due to its rugged shoreline. It is part of the larger regional conservation effort to preserve the scenic natural character of the Yokosuka coastline.
The elevated observation deck overlooking the jagged rock formations with the bay in the background.
Wear sturdy, non-slip footwear as the coastal rocks can be slippery and uneven.
Check local tide charts before visiting, as high tide submerges several of the scenic walking trails along the water.
Bring wind-resistant clothing, as the exposed cliffside is subject to strong ocean gusts throughout the year.
Attempting to climb the unstable cliff faces or venturing onto rock platforms during incoming tides.
Stay on marked trails to protect fragile coastal vegetation; do not remove rocks or marine life from tide pools.
