咸北線
The Hamgyeong Line was a railway line of the Chosen Government Railway ("Sentetsu") in Japanese-occupied Korea, running from Wonsan to Sangsambong. Construction began in 1914, and was completed in 1928. The line is now entirely within North Korea; the Korean State Railway has divided it between the Kangwŏn Line (Wonsan−Kowon section), the P'yŏngra Line (Kowon−Cheongjin section), the Kangdŏk Line (Namgangdŏk−Suseong), and the Hambuk Line (Chongjin−Sangsambong section).