The Manchukuo National Railway (Traditional Chinese and Japanese kanji: 滿洲國有鐵道, Japanese romanization: Manshū Kokuyū Tetsudō) was the state-owned national railway company of Manchukuo. Generally called the "國線" ("National Line", Kokusen), it was controlled by the Manchukuo Ministry of Transportation and had its lines primarily in the central and northern parts of the country. In local newspapers it was simply referred to as "國鉄" (Japanese: Kokutetsu, "National Rail"). It was built, operated and managed by the South Manchuria Railway, a state-own national railway company of the Empire of Japan, of which the Kwantung Army frequently intervened in its affairs.