These semi-streamlined railcars, powered by a 107 hp (80 kW) Waukesha Motor Company type 6RB 6-cylinder petrol engine mounted under the floor, were of lightweight construction, weighing 25 t (25 long tons; 28 short tons); they were 20 m (66 ft) in length and had a maximum speed of 70 km/h (43 mph).

Powered by a 170 hp (130 kW) Kawasaki KP170B 6-cylinder engine, they were intended for use on mountainous lines.

Finally, in 1942, an uncertain number, probably seven, of railcars of yet another design were built by Nippon Sharyō.

[1] At the time of Liberation, 31 of 60 railcars of all types (steam, diesel and both standard- and narrow-gauge petrol) were left in the South; these were subsequently operated by the Korean National Railroad.

[1] Very little is known about the service lives of the 29 railcars that remained in the North after the partition of Korea and were inherited by the Korean State Railway, but at least one Gyeongseong-built unit was seen in service on the Pukbunaeryuk Line in 2012; its number is unknown.