| E129 series | |
| Manufacturer: | J-TREC |
| Factory: | Niitsu |
| Family: | sustina |
| Replaced: | 115 series |
| Yearconstruction: | 2014–2018, 2022–present |
| Yearservice: | 6 December 2014 |
| Numberbuilt: | 176 vehicles (62 sets) |
| Numberservice: | 172 vehicles (61 sets) |
| Formation: | 2/4 cars per trainset |
| Fleetnumbers: | A1–A34, B1–B27 |
| Operator: | JR East |
| Depots: | Niigata |
| Carbody: | Stainless steel |
| Width: | 2950mm |
| Height: | 3620mm |
| Floorheight: | 1130mm |
| Doors: | 3 pairs per side |
| Maxspeed: | 110km/h |
| Traction: | Variable frequency (IGBT) |
| Electricsystem: | 1,500 V DC |
| Collectionmethod: | Overhead catenary |
| Bogies: | DT71 (motored) TR255 (trailer) |
| Safety: | ATS-P, ATS-Ps |
| Multipleworking: | E127 series, under emergency conditions |
The 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.
Built at the J-TREC factory in Niitsu, Niigata, the stainless steel body and "universal design" interior is derived from the E233 series commuter EMU. Externally, trains are finished in a livery with and stripes. The trains have a maximum speed of 110km/h.
E129 series trains operate on the following lines,[1] completely replacing older 115 series sets by around 2017.[2]
The E129 series trains can operated in multiple, to form 2+2, 2+4, and 2+2+2 formations, but do not operate in multiple with E127 series trains except in emergencies.
the E129 series fleet consists of 34 two-car sets (68 vehicles) numbered A1 to A34 and 27 four-car sets (108 vehicles) numbered B1 to B27. All sets are based at Niigata Depot.[3]
The two-car sets, A1 to A32, consist of two motored cars, each with one powered bogie, and are formed as shown below.[3]
| Designation | Mc-100 | Mc'-100 | |
|---|---|---|---|
| Numbering | KuMoHa E129-100 | KuMoHa E128-100 | |
| Weight (t) | 37.2 | 37.2 | |
| Capacity (total/seated) | 140/50 | 133/46 |
The four-car sets, B1 to B26, consist of four motored cars, each with one powered bogie, and are formed as shown below.[3]
| Designation | Mc-0 | M'-0 | M-0 | Mc'-0 | |
|---|---|---|---|---|---|
| Numbering | KuMoHa E129 | MoHa E128 | MoHa E129 | KuMoHa E128 | |
| Weight (t) | 37.2 | 31.6 | 32.7 | 37.0 | |
| Capacity (total/seated) | 140/50 | 154/60 | 154/60 | 133/46 |
Passenger accommodation consists of a mix of transverse seating bays and longitudinal bench seating.[3] LED lighting is used throughout.[3] Longitudinal seats have a width of 460mm per person, wider than for the earlier E127 series trains, and the seating pitch for transverse seating bays is 540mm, approximately wider than E233 series trains.[3] Floor height is 1130mm, the same as for E127 series trains, and lower than the 1225mm floor height of 115 series trains.[3]
Initial details of the new trains were announced by JR East in July 2013.[4] The first two two-car sets, A1 and A2, were delivered on 8 October 2014, with test-running commencing the same day.[5]
The first trains entered revenue service on 6 December 2014.[6]
, the fleet is as follows.[7]
| Set No. | Date delivered | |
|---|---|---|
| A1 | 17 October 2014 | |
| A2 | ||
| A3 | ||
| A4 | 23 October 2014 | |
| A5 | 7 November 2014 | |
| A6 | 21 November 2014 | |
| A7 | 8 December 2014 | |
| A8 | 22 December 2014 | |
| A9 | 15 January 2015 | |
| A10 | 28 January 2015 | |
| A11 | 27 February 2015 | |
| A12 | ||
| A13 | 20 April 2015 | |
| A14 | ||
| A15 | 21 May 2015 | |
| A16 | ||
| A17 | 18 June 2015 | |
| A18 | ||
| A19 | 16 July 2015 | |
| A20 | ||
| A21 | 20 August 2015 | |
| A22 | ||
| A23 | 15 September 2015 | |
| A24 | ||
| A25 | 16 October 2015 | |
| A26 | ||
| A27 | 11 November 2015 | |
| A28 | ||
| A29 | 2 December 2015 | |
| A30 | 1 February 2016 | |
| A31 | 11 December 2017[8] | |
| A32 | 26 December 2017 | |
| A33 | February 2022[9] | |
| A34 | 2022[10] |
| Set No. | Date delivered | |
|---|---|---|
| B1 | 28 January 2016 | |
| B2 | 29 January 2016 | |
| B3 | 1 February 2016 | |
| B4 | 5 February 2016 | |
| B5 | 15 February 2016 | |
| B6 | 19 February 2016 | |
| B7 | 26 February 2016 | |
| B8 | 4 March 2016 | |
| B9 | 10 March 2016 | |
| B10 | 17 March 2016 | |
| B11 | 24 March 2016 | |
| B12 | 31 March 2016 | |
| B13 | 9 June 2016 | |
| B14 | 21 June 2016 | |
| B15 | 1 July 2016 | |
| B16 | 13 July 2016 | |
| B17 | 27 July 2016 | |
| B18 | 5 August 2016 | |
| B19 | 22 August 2016 | |
| B20 | 1 September 2016 | |
| B21 | 13 September 2016 | |
| B22 | 26 September 2016 | |
| B23 | 27 January 2017 | |
| B24 | 6 February 2017 | |
| B25 | 14 February 2017 | |
| B26 | 2018 | |
| B27 | 2022 |
Delivery of three two-car sets from J-TREC in Niitsu began in March 2020. They are derived from the E129 series and are scheduled to replace the 115 series currently operated by Shinano Railway.[11] These trains were put into service of rapid trains operated by Shinano Railway starting from 4 July 2020.[12]