Line bound for Meitetsu Gifu. History Four different companies built sections of the line, which were subsequently amalgamated and linked to create today's line. The Nagoya Electric Railway opened the Ōshikirichō to Marunouchi section (Ichinomiya, Tsushima, Kiyosu Line), dual track and electrified at 600 V DC, in 1914. Transferred to Nagoya Railway (old) in 1921. The Bisai Railway opened the Kōnomiya to Ichinomiya section (Nakamura Line), single track and electrified at 600 V DC, in 1924. Merged with Nagoya Railroad in 1925 (changes name to Kōnomiya Branch Line). The Mino Electric Railway opened the Kasamatsu to Gifu section (Kasamatsu Line), single track and electrified at 600 V DC, in 1914. Merged with Nagoya Railroad in 1930, and the company changed its name to Meigi Railway. The Marunouchi to Kōnomiya section was opened by the Nagoya Railway in 1928, the Ichinomiya to Kasamatsu section was opened by the Meigi Railway in 1935, and by 1935 the line was dual track as far as Kanō. Meanwhile, the Aichi Electric Railway opened the Jingu-mae to Arimatsu section in 1917 (Arimatsu Line), electrified at 600 V DC, and extended the line to Toyohashi in 1927 (becoming the Toyohashi Line). The Narumi to Yahagibashi section was double-tracked in 1924, and by 1935, the line was double-tracked from Horita to the Hirai Signal Box. The voltage on the line was increased to 1,500 V DC in 1925. In 1935 the Aichi Electric Railway merged with Meigi Railway, and the company changed its name to Nagoya Railroad. The Jingū-mae to Horita section was double-tracked in 1942, and in 1944, the Nagoya to Jingū-mae section opened as dual track, linking the two sections, although through-running was not possible until the voltage on the Nagoya to Gifu section had been increased to 1,500 V DC in 1948. The line was renamed the Nagoya Main Line. Former connecting lines Marunouchi Station: The Nagoya Electric Railway opened a 1 km line to Kiyosu-Chō, electrified at 600 V DC, in 1914. The company merged with Meitetsu in 1930. Services were deemed non-essential and ceased in 1944, and the line was formally closed in 1948 when the voltage on the main line was increased to 1,500 V DC. Ichinomiya Station: The Nagoya Electric Railway opened a 7 km line electrified at 600 V DC from Iwakura on its Inuyama Line in 1913. The voltage on the line was increased to 1,500 V DC