The JGR Class 7100 was a Japanese steam locomotive which was first used in Hokkaido, upon the establishment of the government-sponsored Horonai Railway in 1880. The locomotives were imported from the United States.The locomotives were produced by the American company H. K. Porter, Inc. Two were purchased in 1880 (Nos. 368, 369), two more in 1882 (Nos. 487, 488), one in 1884 (No. 643), one in 1885 (No. 672), and two more in 1889 (Nos. 1009, 1010), for a total of eight.