Chōsen Railway Class 810 Korean State Railway Class 500
Builder's photo of Chōsen Railway Class 810 no. 812
Type and origin Power type Steam Builder Kisha Seizō Build date 1935–1936 Total produced 8
Specifications Configuration: ​  • Whyte 2-8-0 Gauge 762 mm (2 ft 6 in) Driver dia. 810 mm (32 in) Length 12,668 mm (498.7 in) Width 2,150 mm (85 in) Height 3,200 mm (130 in) Total weight 51.50 t (50.69 long tons)
Performance figures Tractive effort 46.19 kN (10,380 lbf)
Career Operators Chōsen Railway Korean State Railway Korean National Railroad Class Chōsen Railway: 810 KSR: 500 KNR: ? Number in class 8 Numbers Chōsen Railway: 810-817 Delivered 1935: 810-813 1936: 814-817

The Class 810 was a class of steam tender locomotives for freight trains with 2-8-0 wheel arrangement operated by the Chōsen Railway in colonial Korea.^[1][2]

The first four were built for the Chōsen Railway in 1935 by Kisha Seizō of Japan for use on the railway's Hambuk Line, intended to haul iron ore trains; they were numbered 810 through 813.^[1] Work to convert this line was converted to standard gauge was completed on 1 May 1940,^[3] after which the locomotives were transferred to the railway's Hwanghae Line, Suin Line, and Suryeo Line.

A second batch of four, numbers 814 through 817 were delivered by Kisha Seizō in 1936.^[1][2]

After the Liberation and partition of Korea, these locomotives were divided between the Korean State Railway of North Korea and the Korean National Railroad of South Korea. Those which ended up in the North were numbered in the 500 series, with three still surviving - one operational - in 2004.^[4]