Domun Railway

The Domun Railway Company (Japanese: 図們鉄道株式会社, Tomon Tetsudo Kabushiki Kaisha; Korean: 도문철도주식회사, Domun Cheoldo Jusikhoesa), was a privately owned railway company in Japanese-occupied Korea.

The Tomun Railway's line ran from Hoeryeong to Sambong, and was opened in three stages: the Hoeryŏng–Sangsambong (now called Sambong) section (40.4 km (25.1 mi)) was completed on 5 January 1920, the Sangsambong–Jongseon section (9.1 km (5.7 mi)) on 1 December 1922, and the Jongseon-Donggwanjin section (8.2 km (5.1 mi)) on 1 November 1924. The last line to be opened by the Domun Railway was the 10.6 km (6.6 mi) Hoeryeong Colliery Line from Hoeryong to Yuseon, which was opened on 11 August 1928.

This line was nationalised on 1 April 1929, becoming the West Domun Line of the Chosen Government Railway (Sentetsu). Subsequently, merged with Sentetsu's East Domun Line (Donggwanjin–Unggi), the management of the entire line was transferred to the South Manchuria Railway; at that time, the merged Domun Line was added to the existing (Wŏnsan-Ch'ŏngjin) Hamgyŏng Line.

After the end of the Pacific War, the Provisional People’s Committee for North Korea nationalised all railways in the Soviet zone of occupation on 10 August 1946, and following the establishment of North Korea, the Korean State Railway was created. After the end of the Korean War, the restructuring of the North Korean railway system, including the rearrangement of rail lines, led to the Hoeryeong–Sambong line becoming part of the Korean State Railway's Hambuk Line running from Cheongjin to Rajin via Namyang.