The Kashio River (柏尾川) is a Class B river in Kanagawa Prefecture, Japan, about 50 kilometers southwest of Tokyo. It begins in Kashio, Totsuka-ku, Yokohama at the confluence of the Akuwa River (阿久和川) and the Hiradonagaya River (平戸永谷川) and flows for 11 kilometers to the city of Fujisawa, where it merges with the Sakai River at the confluence known as Kawana (川名).[1] The conjoined river, which is sometimes known as the Katase River, then flows into Sagami Bay at Enoshima Island. | ||||||