Meijō Line
The first section of Line 2, between Sakae-machi (current Sakae) and Shiyakusho, opened in 1965. The line was named Meijō Line in 1969, and the extension was completed in 1971. Line 4 opened its first section between Aratama-bashi and Kanayama in 1974. The line extension was completed in 2004, making a loop line together with Line 2. At the same time, the whole loop line was renamed the Meijō Line, and the section of Line 2 between Kanayama and Nagoyakō, outside the loop, became the Meikō Line.