The Sorii class (ã½ãªã¤) was a class of steam tender locomotives of the Chosen Government Railway (Sentetsu) with 2-8-0 wheel arrangement. The "Sori" name came from the American naming system for steam locomotives, under which locomotives with 2-8-0 wheel arrangement were called "Consolidation".
Built by the Baldwin Locomotive Works of the United States in 1894, the ã½ãªã¤ (Sorii) class locomotives were bought second-hand by the Imperial Japanese Army for use by the Temporary Military Railway in Korea. In 1906, the Temporary Military Railway was taken over the Government-General of Korea to create the National Railway, which became Sentetsu in 1910. First numbered 101âÂÂ106, they became numbers 1001âÂÂ1006 in 1918, and finally in Sentetsu's 1938 general renumbering, they were given the numbers ã½ãªã¤1 through ã½ãªã¤6.
After the partition of Korea, all six remained in the South, becoming Korean National Railroad class Sori1 (ìÂÂ리1), numbered ìÂÂ리1-1 through ìÂÂ리1-6.