| E131 series | |
|---|---|
 | |
| Manufacturer | Japan Transport Engineering Company |
| Built at | Akiha-ku, Niigata |
| Family name | sustina |
| Replaced | 205 series, 209-2000/2100 series |
| Constructed | 2020−Present |
| Entered service | 13 March 2021 |
| Number built | 141 vehicles (47 sets) |
| Number in service | 141 vehicles (47 sets) |
| Formation | 2–4 cars per trainset |
| Operators |  JR East |
| Lines served | Kashima Line, Narita Line, Nikkō Line, Sotobō Line, Uchibō Line, Sagami Line, Utsunomiya Line, Tsurumi Line |
| Specifications | |
| Car body construction | Stainless steel |
| Car length |
|
| Width | 2.95 m (9 ft 8 in) |
| Height |
|
| Floor height | 1.13 m (3 ft 8 in) |
| Doors | 4 pairs per side |
| Maximum speed | 110 km/h (68 mph) |
| Traction system | Hitachi hybrid-SiC/IGBT–VVVF |
| Traction motors | MT83 150 kW (201 hp) 3-phase AC induction motor |
| Transmission | 7.07:1 (99:14) gear ratio |
| Electric system(s) | 1,500 V DC overhead catenary |
| Current collector(s) | Pantograph |
| Track gauge | 1,067 mm (3 ft 6 in) |
The E131 series (E131系) is a DC electric multiple unit (EMU) train type operated by the East Japan Railway Company (JR East). It began operations in the Chiba area on 13 March 2021, on the Sagami Line on 18 November 2021, and on the Nikkō Line and the Utsunomiya Line on 12 March 2022. The trains are equipped for driver-only operation (wanman (ワンマン, "one man")).