Enoshima 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 bridge. Home to some of the closest sandy beaches to Tokyo and Yokohama, the island and adjacent coastline are the hub of a local resort area.