咸北線
In order to exploit the rich iron deposits of the Musan region, the North Chosen Colonial Railway began construction of this line, calling it the Hambuk Line (not to be confused with the current Hambuk Line, which at that time was part of the Hamgyŏng Line). The line was opened in two parts - the Komusan-Sinch'am section opening on 20 August 1927, and the Sinch'am-Musan segment being opened on 15 November 1929. On 1 February 1937, Musan Ch'ŏlsan station was opened.