Meitetsu Tokoname Line

The line was not built by Meitetsu but by the Aichi Electric Railway (愛知電気鉄道), a private company whose first segment, a light railway between Tenma (later Tenmachō) and Ōno (now Ōnomachi), opened on 18 February 1912. Construction extended the route over the following months and into 1913: the Akibamae–Tenmachō section opened in August 1912, the Ōnomachi–Tokoname section on 29 March 1913, and finally the Jingū-mae–Akibamae section on 31 August 1913, by which date the line was complete though still entirely single-track. At opening the Aichi Electric Railway operated at 600 V DC.

Through the 1910s and 1920s the company steadily improved the line, opening intermediate stations and progressively double-tracking the route segment by segment between 1920 and 1925. A branch from Ōe, the Chikkō Line, opened in 1924, making Ōe a junction. On 18 January 1929 the overhead voltage across the whole line was raised from 600 V DC to 1,500 V DC, the standard the line still uses today.

On 1 August 1935 the Aichi Electric Railway merged with the Nagoya-Gifu Railway (名岐鉄道) to form the present-day Nagoya Railroad — Meitetsu — which thereafter operated the Tokoname Line as part of its network. In 1942 a separate Jingū-mae (west) station was opened on the far side of the parallel Tōkaidō Main Line and many trains used it as their terminus, but the arrangement was later wound down; through running with the Nagoya Main Line began with the timetable revision of 10 July 1950, and from 1963 all passenger trains ran through to the Nagoya Main Line, the west-side station's regular passenger services being withdrawn.

The line was twice battered by disaster in the late 1950s. In September 1959 Typhoon Vera (the Isewan Typhoon) caused severe damage; storm-surge flooding submerged part of the route, and for a time trains ran on a temporary single-track line laid out over the inundated section until the seawater drained away, with full restoration of the unbroken line achieved by 15 November 1959. Double-tracking of the route was finally completed on 12 March 1972, when the Taya–Tokoname section was doubled. Over the post-war decades the express services on the line were repeatedly reorganised, reflecting the changing pattern of Meitetsu limited-express and rapid operations.

The defining change in the line's modern history came with the opening of Central Japan International Airport on a man-made island off Tokoname. To prepare, the Enokido–Tokoname section was suspended from 26 January 2002 for elevation works, with substitute buses running, and reopened on its new viaduct on 4 October 2003. The connecting Airport Line — built as an extension of the Tokoname Line — opened on 29 January 2005, positioning the Tokoname Line as the access route to the new airport; a new "Rapid Limited Express" class was introduced at the same time to serve it.

With the airport link the line's role shifted decisively from a local commuter railway toward a trunk corridor on a par with the Nagoya Main Line, and operating speeds were raised. On 27 December 2008 the Rapid Limited Express service was rebranded "μ-SKY" (ミュースカイ), the all-reserved airport express that now runs between central Nagoya and Centrair over the Tokoname and Airport lines. Today the Tokoname Line carries a dense mix of local, express and airport-express services, with manaca and nationwide interoperable IC cards accepted at every station.

• 191218 February: the Aichi Electric Railway opens its first segment, a light railway from Tenma (later Tenmachō) to Ōno (now Ōnomachi), at 600 V DC.
• 19121 August: the Akibamae–Tenmachō section opens (Tenma renamed Tenmachō).
• 191329 March: the Ōnomachi–Tokoname section opens.
• 191331 August: the Jingū-mae–Akibamae section opens, completing the line, which is at this point still entirely single-track.
• 192415 January: the Chikkō Line opens from Ōe, making Ōe a junction station (Ōe relocated the same day).
• 1925Double-tracking of the line, carried out segment by segment from 1920, is largely completed (Shibata–Nawamura doubled 19 June 1925).
• 192918 January: the overhead voltage across the whole line is raised from 600 V DC to 1,500 V DC.
• 19351 August: the Aichi Electric Railway merges with the Nagoya-Gifu Railway to form the Nagoya Railroad (Meitetsu), which thereafter operates the line.
• 194210 July: a separate double-track Jingū-mae (west) station opens on the far side of the Tōkaidō Main Line, used as a terminus by many trains.
• 195010 July: through running with the Nagoya Main Line begins with the timetable revision.
• 195926 September: Typhoon Vera (the Isewan Typhoon) causes severe damage; storm-surge flooding submerges part of the line. The whole line is restored by 15 November after a temporary single track is run over the flooded section.
• 196325 March: regular passenger services to the Jingū-mae (west) station are withdrawn and all passenger trains run through to the Nagoya Main Line.
• 197212 March: the Taya–Tokoname section is double-tracked, completing double-tracking of the whole line.
• 200226 January: the Enokido–Tokoname section is suspended for elevation (viaduct) works, with substitute buses running.
• 20034 October: the elevated Enokido–Tokoname section reopens.
• 200529 January: the connecting Airport Line, built as an extension of the Tokoname Line, opens, making the Tokoname Line the access route to Central Japan International Airport (Centrair); a new Rapid Limited Express class is introduced.
• 200827 December: the Rapid Limited Express service is rebranded 'μ-SKY' (ミュースカイ), the all-reserved airport limited express running between central Nagoya and Centrair.