High Bridge is a shallow reef site located off the Izu Peninsula in Japan. Accessible only by boat, this site is well-suited to newly certified divers looking to build confidence in open water. The reef environment supports a variety of reef fish and invertebrates typical of the region. Conditions at the site are variable, with currents that can change between visits. Water temperatures fluctuate significantly throughout the year, ranging from 9C in March to 25C in August. Guided tours are available through the local dive shop to assist with dive planning and to provide advice on appropriate wetsuit thickness for the current conditions.
38.44596, 141.44539
The waters of Tohoku change dramatically throughout the year, with wakame seaweed forests in spring, sea urchins in summer, salmon in autumn, and oysters and scallops in winter.
Located at Seapal Pier Onagawa, D16, 2-61-1, Onagawa-cho, Oshika-gun, Miyagi Prefecture. Accessible by car via the Sanriku Expressway or by train via the Ishinomaki Line to Onagawa Station.
Recorded at this site
Entry
Boat
Boat required
Water Temp
9-25°C
The reef supports a variety of reef fish and invertebrates typical of the region.
Yes, the site is well-suited to newly certified divers building confidence in open water, though guided tours are recommended for early-career divers.
High Bridge is a boat-only dive site.
Water temperatures vary from 9C in March to 25C in August.
Diving at High Bridge in Onagawa requires the following certifications: Open Water. Always dive within your training limits.
A 7mm wetsuit or semi-dry is recommended for diving at High Bridge in Onagawa. Water temperatures range from 9°C to 25°C.
