The Mizushima Rinkai Railway (水島臨海鉄道, Mizushima Rinkai Tetsudō, "Mizushima Seaside Railway") is a third-sector railway company based in Kurashiki, Okayama, Japan. The company took over operation of three former Kurashiki City Transportation Bureau lines in 1970. It mainly transports freight for the industrial area around the Port of Mizushima, but also operates a passenger service on the Mizushima Main Line.