The Chà Âsen Gyeongnam Railway (Japanese: æÂÂ鮮京åÂÂéÂÂéÂÂæ ªå¼Âä¼Â社, Chà Âsen Kyà Ânan Tetsudà  Kabushiki Kaisha; ), was a privately owned railway company in Japanese-occupied Korea.
The company began operations in 1912, and by 1931 it had opened a network of nearly in the area around Cheonan. Following the partition of Korea, the entirety of the Chà Âsen Gyeongnam Railway's network was located in the American zone of occupation. All railways in South Korea, including the Chà Âsen Gyeongnam Railway, were nationalised in 1946, becoming part of the Korean National Railroad.
The Chà Âsen Gyeongnam Railway opened the following railway lines between 1912 and 1931:
After the nationalisation, the Korean National Railroad took over these lines, eventually rearranging them. The GunsanâÂÂGunsan Wharf section of the Gunsan Line was detached to create the Gunsan Freight Line, whilst the IriâÂÂGunsan section of the Gunsan Line and the entirety of the Ch'ungnam Line from Gunsan to Cheonan were merged to create the Janghang Line in 1955. The Gyeonggi Line was renamed in the same year.
In the November 1942 timetable, the last issued prior to the start of the Pacific War, the Chà Âsen Gyeongnam Railway was running extensive passenger services on the Chungnam Line, along with three daily round trips on the Gyeonggi Line.
Few details are available about the rolling stock operated by the Chà Âsen Gyeongnam Railway; known are the 100 series and 200 series 2-6-2T tank locomotives, which were later used by the KNR as the Pureo7-100 and Pureo7-200 classes. In addition, two locomotives identical to the Japanese Government Railways Class C11 were delivered new in 1935 and 1936 from Hitachi, numbered 25 (w/n 624) and 26 (w/n 725) respectively.