The Rinkō Line(臨港線,Rinkō-sen?, "Portside Line") is a Japanesefreight only railway line between Harutori and Shireto, all within Kushiro, Hokkaidō. This is the only railway line of Taiheiyō Coal Services and Transportation(太平洋石炭販売輸送,Taiheiyō Sekitan Hanbai Yusō?). The line is the only private railway in Hokkaidō, as well as the only surviving colliery railway in Japan. The first section of the line opened in 1925. It also had a passenger service until 1966. The line transports coals from the mine to Port of Kushiro.