Ago Island

This dive site, Agojima Island in Onagawa, is a beginner-friendly location just 5 minutes by boat from Onagawa Port. It offers rugged reefs and narrow waterways, creating a scenic underwater terrain. With typical depths of 11-12 meters, reaching a maximum of 17 meters, it provides a manageable and interesting environment for novice divers to explore without significant historical context or specific navigation challenges. The marine environment at Ago Island is known for its resident species. Divers can consistently spot pink dungfish, beaked sculpin, and true booyahs (maboya) throughout the year. Additionally, the site experiences strong tides that bring in a rich variety of seasonal migratory fish, enhancing the biodiversity and offering varied encounters at different times. The site is suitable for diving year-round, with the potential for exciting sightings of migratory fish adding seasonal highlights. Its shallow and scenic nature makes it an excellent choice for beginner divers, while also being highly suitable for both freedivers and snorkelers who can enjoy the vibrant shallow reefs and observe the abundant small marine life from the surface or with breath-hold dives.