| E129 series | |
|---|---|
 Set B5 in February 2017 | |
| Manufacturer | J-TREC |
| Built at | Niitsu |
| Family name | sustina |
| Replaced | 115 series |
| Constructed | 2014–2018, 2022–present |
| Entered service | 6 December 2014 |
| Number built | 176 vehicles (62 sets) |
| Number in service | 172 vehicles (61 sets) (as of 7 March 2022[update]) |
| Formation | 2/4 cars per trainset |
| Fleet numbers | A1–A34, B1–B27 |
| Operators | JR East |
| Depots | Niigata |
| Specifications | |
| Car body construction | Stainless steel |
| Car length |
|
| Width | 2,950 mm (9 ft 8 in) |
| Height | 3,620 mm (11 ft 11 in) |
| Floor height | 1,130 mm (3 ft 8 in) |
| Doors | 3 pairs per side |
| Maximum speed | 110 km/h (68 mph) |
| Traction system | Variable frequency (IGBT) |
| Acceleration | 2.0 km/(h⋅s) (1.2 mph/s) |
| Deceleration | 3.6 km/(h⋅s) (2.2 mph/s) |
| Electric system(s) | 1,500 V DC |
| Current collector(s) | Overhead catenary |
| Bogies | DT71 (motored) TR255 (trailer) |
| Safety system(s) | ATS-P, ATS-Ps |
| Multiple working | E127 series, under emergency conditions |
| Track gauge | 1,067 mm (3 ft 6 in) |
The E129 series (E129系) is a DC electric multiple unit (EMU) train type operated by East Japan Railway Company (JR East) on local services in the Niigata area since 6 December 2014.