The Osezaki peninsula is a sand spit formed by the erosion of surrounding volcanic cliffs, creating a unique micro-ecosystem.
The bay is one of the few places in Japan where you can observe deep-sea fish species in relatively shallow waters due to the extreme depth of the adjacent Suruga Bay.
Osezaki is home to a grove of ancient Juniper trees, known as the 'Biakushin' trees, which are estimated to be over 1,000 years old.
The site hosts a small shrine, Ose-jinja, dedicated to the guardian deity of the sea and local fishermen.
The water clarity is significantly influenced by the deep-water upwelling characteristic of Suruga Bay.
Ose Beach, located on the Osezaki peninsula in Suruga Bay, is a premier scuba diving destination known for its sheltered waters and underwater visibility. The site is famous for the 'Ose-zaki' underwater topography, which features dramatic drop-offs and a high density of marine life including lionfish and schools of damselfish. On clear days, the beach provides a direct view of Mt. Fuji rising above the Izu Peninsula skyline. The location sits on a narrow sandbar that creates two distinct sides: a calm inner bay and a more exposed outer coast. The area is highly developed for recreational diving, featuring multiple dedicated facilities, showers, and equipment rental shops right on the shore. It is a popular spot for both macro photography and training due to the relatively stable water conditions.
The shoreline near the Ose-jinja shrine facing north provides the iconic framing of the beach with Mt. Fuji in the background.
Bring polarized sunglasses to cut the glare off the water when scanning for Mt. Fuji views.
Visit on a weekday if possible, as the parking areas and diving facilities become crowded with student groups and diving clubs on weekends.
Rent local equipment on-site if you are not traveling with your own, as most facilities offer comprehensive full-day packages.
Avoid swimming or snorkeling outside of the designated safety zones, as currents can change rapidly near the tip of the peninsula.
Respect designated diving zones; do not walk over exposed reef areas or touch marine life. Observe quiet hours near the local shrine.
