Enoshima (江の島) is a small offshore island, about 4 km in circumference, at the mouth of the Katase River, which flows into the Sagami Bay of Kanagawa Prefecture, Japan. Administratively, Enoshima is part of the mainland city of Fujisawa, and is linked to the eponymous Katase section of that city by a 600-metre-long (2,000 ft) bridge.