| Uchiko Line | |
| Color: | fbaf18 |
| Type: | Heavy rail |
| Stations: | 4 |
| Open: | 1920 |
| Linelength: | 5.31NaN1 |
| Electrification: | None |
| Speed: | 110 km/h (68 mph) |
| Map State: | collapsed |
The is the name of a short section of railway line that was originally a branch line before a section of it was upgraded and became part of the Yosan Line. It connects in Uchiko, Kita District to in Ōzu, entirely in Ehime Prefecture on the island of Shikoku, Japan, and operated by the Shikoku Railway Company (JR Shikoku). The line is operationally part of the Yosan Line, and retains it separate name due to the Japanese naming convention which requires a formal change of name, which has not occurred in this case.
The line is served by Limited Express trains between Okayama (Shiokaze trains, one round-trip a day), Takamatsu (Ishizuchi trains, two Takamatsu-bound trains a day) or Matsuyama (Uwakai trains, 14 return trips and two Uwajima-bound trains a day) and Uwajima, and Local trains between Matsuyama or Iyoshi and Iyo-Ōzu, Yawatahama or Uwajima.
The line was originally built by the as a light railway line from, near Nagahama-machi (the present Iyo-Nagahama) to Uchiko, opening on May 1, 1920.
On October 1, 1933, the line (along with the Ehime Railway Main Line) was nationalised and the name was assigned to both lines; both lines were regauged to, the national standard, on October 6, 1935, the same day when the Ehime Line was incorporated into the Yosan Main Line. That day, the line from Gorō to Uchiko gained its own identity as the Uchiko Line.
Freight operations ceased on December 1, 1971.
On November 25, 1985, the line was closed and the passenger service was replaced by buses to allow heavier rails to be laid, the railbed to be strengthened, and curves to be relaxed. The next year, on March 3, the line between Uchiko and Niiya, together with new sections of the Yosan Main Line from Mukaibara and Niiya to Iyo-Ōzu, opened as a shortcut route between Matsuyama and Uwajima, with new passing facilities at Niiya, relocated stations at Uchiko and Ikazaki, and Centralised Traffic Control. The section from Niiya to Gorō was closed.
In 1987 JNR was regionalised and privatised, and the Uchiko Line came under the control of Shikoku Railway Company, with Japan Freight Railway Company operating services on the line. JR Freight subsequently ceased to run services on the line on April 1, 2006.