121 series
| 121 series 7200 series | |
|---|---|
A pair of 121 series sets on the Yosan Line in May 2009 | |
| In service |
|
| Manufacturers | Hitachi, Kawasaki Heavy Industries, Kinki Sharyo, Tokyu Car Corporation |
| Replaced | 121 series (until 2019) |
| Constructed | 1986–1987 |
| Refurbished | 2016–2019 |
| Number built | 38 vehicles (19 sets) |
| Number in service | 38 vehicles (19 sets) |
| Formation | 2 cars per trainset |
| Operators | 121 series: JNR (1987) JR Shikoku (1987–2019) 7200 series: JR Shikoku (2016–present) |
| Depot | Takamatsu |
| Lines served | Dosan Line, Yosan Line |
| Specifications | |
| Car body construction | Stainless steel |
| Car length | 20,000 mm (65 ft 7 in) |
| Width | 2,800 mm (9 ft 2 in) |
| Height | 3,670 mm (12 ft 0 in) |
| Floor height | 1,180 mm (3 ft 10 in) |
| Doors | 3 pairs per side |
| Maximum speed | 100 km/h (62 mph) |
| Traction system |
|
| Traction motors |
|
| Power output | 121 series: 110 kW x 4 7200 series: 140 kW x 4 |
| Acceleration | 2.0 km/(h⋅s) (1.2 mph/s) |
| Electric systems | 1,500 V DC (overhead catenary) |
| Current collection | Pantograph |
| Bogies | 121 series: DT33A (motored) DT12T (trailer) 7200 series: S-DT67ef (motored) S-TR67ef (trailer) |
| Multiple working | 7200 series: 7000 series |
| Track gauge | 1,067 mm (3 ft 6 in) |
The 121 series (121系) is an electric multiple unit (EMU) train type introduced in March 1987 by Japanese National Railways (JNR), and currently operated by Shikoku Railway Company (JR Shikoku) on local services in Shikoku, Japan, as the 7200 series.