[2] The Moga class was the first type of steam locomotive in Korea, introduced by the Gyeongin Railway in 1899 for use on the Incheon—Noryangjin line.

It was quickly found insufficient, and no further locomotives of the same wheel arrangement were introduced.

[1] Four 2-6-0T tank locomotives were built for the Seoul & Chemulpo Railway - the English name of the Gyeongin Railway - by the Brooks Locomotive Works in the United States, and were shipped to Korea disassembled and assembled at Incheon on 17 June 1899.

[1] In 1918 they were designated モガ (Moga) class by Sentetsu, retaining their Gyeongbu Railway numbers as モガ101 – モガ194, and Sentetsu's 1938 reclassification became モガイ (Mogai) class モガイ1 through モガイ4.

Although said to have been retired in the 1930s,[1] they were nevertheless accounted for in the 1947 division of Sentetsu assets between North and South Korea, with three going to the Korean National Railroad in the South and one to the Korean State Railway in the North.