The narrow-gauge (2'6" / 762 millimeter) locomotives used Stephenson valve gears and ran on coal. The 4.5 mile line ran every hour from Mitsuhama to Togawa (now Matsuyama City Station) stopping at Komachi station. In the 1894 Murray's Handbook Chamberlain and Mason wrote, "This is a pretty little journey across the mountain-girt plain, in whose centre rises the wooded hill crowned by Matsuyama castle, which comes in view before reaching the intermediate station of Komachi.
Iyo Railway also operates the Botchan Ressha, diesel-powered replicas of the original Iyotetsu locomotives, well-known from Natsume Sōseki's famous 1906 novel, Botchan.