The Toshiba EMU is an electric multiple unit train model used in the Roca Line in the Southern Buenos Aires Metropolitan Area, Argentina.

[1] At this time, the Roca Line was under electrification works, which also comprised the creation of a specialized shop for electric multiple units in Llavallol, where the Toshiba trains are maintained as of 2018.

[1] On the November 6th, 1985, a Toshiba train made the inaugural trip of the new Electric service on the Roca Line, transporting the then-president Raúl Alfonsín between the Constitución and Avellaneda stations.

[1][7] The new Electric service represented a great improvement in transport quality from the old diesel push-pull trains on the Roca Railway, and caused a spike in demand.

To cope with this increased demand, an extra car (which was not included in the original japanese design) was built by Materfer in Argentina and added to each trainset.

[1] Since 2002, metal blinds were removed from the trains, in what was called a theft of State property by then-concessionaire Metropolitano, controlled by Sergio Taselli.

Since the Argentine State, through Trenes Argentinos, took control of the operation again in XXX, they have been repaired primarily in the Remedios de Escalada Shops.

The trains operate in the urban and suburban section of the Roca Railway since 1985, between the central station Constitución and the Glew and Ezeiza terminals in the south area of Greater Buenos Aires.

2008 - 2014: As the Argentine government took the line from Metropolitano due to several contract violations, the Toshiba trains started being run by UGOFE, which created a new livery: Dark blue body with silver lines, and the letters LGR painted under the cab car front door and in the lower middle side section of each car.

2014 - Today: As the new CSR EMUs entered service, their livery was adapted to the Toshiba trains: Light-blue body with white lines, and a dark stripe along the windows.

[16] In May 2007, several Toshiba Cars were torched in the Constitución Terminal station, following big delays, and after years of poor service in the Roca Line from private operator Metropolitano.

[18] In October 2007, an EMU derailed between the Adrogué and Burzaco stations, taking down several concrete poles of the railway's overhead line.