Hamnam Line (咸南線, Kan'nan-sen) was the name given by the Chōsen Railway (Chōtetsu) of colonial-era Korea to a small network of 762 mm (30.0 in) narrow gauge railway lines in South Hamgyeong Province.

The first section, 17.0 km (10.6 mi) from Hamheung to Oro, was opened on 7 June 1923,[2] and on 25 August 1923, the 11.2 km (7.0 mi) Oro–Jangpung section and West Hamheung Station were opened.

[6] Two years later, on 1 February 1930 the Hamnam Line was taken over by a newly established subsidiary company, the Sinheung Railway.

[7] The Sinheung Railway continued to expand the network, and on 15 January 1932, after the existing Hamnam Songheung Station was renamed Hasonghung Station, the present Hamnam Songheung Station was opened 1.0 km (0.62 mi) from Hasongheung, [8] and on 10 September 1933, the line was extended 31.6 km (19.6 mi) to Bujeonhoban.

[1] In the November 1942 timetable, the last issued prior to the start of the Pacific War, Chōtetsu operated the following schedule of third-class-only local passenger services:[10]