The is a 1.5 km light rail line owned by Iyotetsu. The line runs entirely within the city of Matsuyama, Ehime Prefecture, Japan.
The Honmachi Line was built in 1911 by the , who ran electric trams on a track. The Matsuyama Electric Railway was merged with Iyotetsu in 1921, who continued to operate the line. In 1923, the tracks were converted from 1435 mm to . The line was briefly closed in 1945 due to damages from air raids in the Second World War, but was restored in 1948.
The line is electrified and is single-tracked for the entire line. There are no passing loops on the line.
The line only operates on weekday mornings.