 The line transported coals from the mine to Port of Kushiro until its closure in 2019.The Pacific Ocean Coal Co. opened a 6km line from the coal mine at Harutori to Irifune-cho wharf in 1925/27, with a 3km line connecting the mine to Higashi-Kushiro opening in 1928.The line was truncated 2km in 1966 when a new coal loading wharf opened, the passenger service ceasing at the same time.