Mining in North Korea - Wikipedia
Iron ore mining. Musan mine, located at Musan County, in the Ch'angryŏl-rodongjagu and Hamgyeongbuk-do, is being operated by Mitsubishi Mining Company of Japan since 1935. The ore is found a strike stip of 1200 m and is operated through nine blocks and extraction is by open pit method. Its iron ore handling capacity is 10 million tons per year.