the Manchukuo National in 1938. The NCTC was included in the unified classification system of 1938, with their locomotives being distinguished by being numbered starting from 1500. Thus, these diverted locomotives became ミカイ1501 through ミカイ1520. A further 249 were built for NCTC between 1939 and 1945 by Kisha Seizō (84), Kawasaki (24), Hitachi (78), and Nippon Sharyō (63). These were numbered ミカイ1521 through ミカイ1909. Following the model of the North China Transportation Company, the Japanese authorities in the territory allocated to the puppet state Reformed Government of the Republic of China (later part of the collaborationist Republic of China from 1940 to 1945) established the Central China Railway to operate the railways in the east-central part of China. Although the Central China Railway used locomotives primarily of Chosen Government Railway and Japanese Government Railway design, in 1940−1941 it did take delivery of nineteen engines of Mantetsu's Mikako design; these were designated the KD100 class, and were numbered KD1001 through KD10019. Five of these, KD1008 through KD10012, were built by Kisha Seizō in 1941 (works numbers 2055 through 2059). A total of 1,144 locomotives of the Mantetsu Mikai, Mantetsu Mikako, "National Big Mika" and "New National Big Mika" designs were built for Mantetsu and the Manchukuo National Railway (including those 20 diverted to North China Transport, but not counting those built expressly for NCTC. Of these, almost half - 527 - were built by Mantetsu's own Shahekou Works in Dairen, but the bulk of production, 617 units, was in Japan: 198 from Kisha Seizō, 167 from Kawasaki, 132 from Hitachi, and 95 from Nippon Sharyō. Only the initial 25 from ALCo of the US were built outside the Japanese Empire. North Chosen Colonial Railway Kisha Seizō built 22 such locomotives for the North Chosen Colonial Railway between 1940 and 1942; these were numbered 1 through 22. After the North Chosen Colonial Railway was nationalised in 1944, these locomotives were taken over by Sentetsu, but their subsequent numbering is unknown. Postwar China Railways 解放1 (JF1) class At the end of the Pacific War, the Mikai class locomotives belonging to Mantetsu and the Manchukuo National were assigned to the Railway Bureaux of Dalian Port (26), Fengtian (319), Jinzhou (154), Jilin (157), and Harbin (188), along with six at Rajin in Korea for use on Mantetsu's North Chosen Line, and 59 that were loaned out to other railways - most (possibly as many as