An E235 series train on the Yamanote Line in July 2017
|Constructed||2015 - 2020|
|Entered service||30 November 2015|
|Number under construction||407 (37 sets)[Note 1]|
|Number built||143 vehicles (13 sets)[Note 1] (as of 31 December 2017[update])|
|Number in service||143 vehicles (13 sets)|
|Formation||11 cars per trainset|
|Depot(s)||Tokyo General Rolling Stock Centre|
|Line(s) served||Yamanote Line|
|Car body construction||Stainless steel|
|Car length||19,570 mm (64 ft 2 in) (end cars)
19,500 mm (64 ft 0 in) (intermediate cars)
|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||4 pairs per side|
|Maximum speed||120 km/h (75 mph)|
|Traction system||Variable frequency (SiC)|
|Electric system(s)||1,500 V DC|
|Current collection method||Overhead catenary|
|Bogies||DT80, TR255, TR264|
|Safety system(s)||ATS-P, D-ATC|
|Track gauge||1,067 mm (3 ft 6 in)|
The E235 series (E235系 E235-kei) is a DC electric multiple unit (EMU) commuter train type operated by East Japan Railway Company (JR East) on Yamanote Line services in Tokyo, Japan. A pre-series train was delivered in March 2015, first entering revenue service from 30 November 2015, but then taken out of service for three months before re-entering service in March 2016. The type is gradually replacing the E231-500 series trainsets in use since 2002.
The E235 series design was developed from the earlier E233 series trains, and like the E233 and E231 series trains, the new E235 series trains have stainless steel bodies. The exterior styling was overseen by the industrial design firm Ken Okuyama Design. The cars feature vertical green stripes running through the doors, as opposed to the former usage of horizontal stripes to allow easier identification of the line at platforms. Baggage racks and hand-holds have been lowered 5 cm for easier access and the seats are 1 cm wider than previous trains. The car interiors also have up to 36 digital monitors for various informational displays. The window behind the drivers cab has been lowered so children can get a better view of the operator of the cars. The temperature of each car is also monitored; the system can predict the number of passengers at upcoming stations and adjust the temperature for passenger comfort. This information is also communicated to a smart phone application, allowing customers to choose in which car to ride based on their temperature preference.
A pre-series set entered revenue service in November 2015, with the entire fleet of 52 E231-500 series trains used on the Yamanote Line scheduled to be replaced by E235 series trains before the 2020 Summer Olympics in Tokyo.
The E235 series trains are formed as 11-car sets with six motored ("M") cars and five non-powered trailer ("T") cars, as shown below. The SaHa E235-4600 car (car 10) in some sets was modified from a former E231-500 series SaHa E231-4600 car.
Pre-series set 01
|Numbering||KuHa E234||MoHa E234||MoHa E235||SaHa E235||MoHa E234||MoHa E235||SaHa E234||MoHa E234||MoHa E235||SaHa E235-4600||KuHa E235|
Production sets 02 onward
The full-production sets introduced from May 2017 are formed as follows.
|Numbering||KuHa E234||MoHa E234||MoHa E235||SaHa E235||MoHa E234||MoHa E235||SaHa E234||MoHa E234||MoHa E235||SaHa E235-4600[Note 1]||KuHa E235|
|Weight (t)||33.2||30.8||31.5||28.8||30.7||31.6||29.4||30.7||30.7||27.1[Note 2]||33.4|
- New-built cars in sets 04-05 are numbered in SaHa E235-500 series.
- 26.9 t for new-built cars in sets 04-05.
Car 3 has one PS33H single-arm pantograph, car 6 has two PS33H pantographs (one used as a backup), and car 9 has one PS33H pantograph.
Passenger accommodation consists of longitudinal bench seating throughout, with an individual seat width of 460 mm (18 in) per person, compared to 450 mm (18 in) for the earlier E231-500 series. Priority seating is provided at both ends of each car (except in end cars), and a space for wheelchairs or strollers is provided at one end of each car. LED lighting is used throughout. The initial plan was for paper advertisements inside the cars to be completely abolished, replaced by 18 LCD colour advertising screens in each car, but following feedback from advertising companies and users, the first train to enter service will include traditional paper advertisements in addition to the LCD screens.
The full-production sets (02 onward) incorporate a number of design changes. Whereas in the pre-series set 01, the luggage rack height was generally 1,678 mm (5 ft 6.1 in) with a height of 1,628 mm (5 ft 4.1 in) in the end cars and in priority seating areas, this is standardized as 1,628 mm throughout from set 02 onward. The handrails next to seats in the full-production sets have an embossed surface compared with the polished metal surface used in the pre-series set.
Details of the E235 series design were first announced in July 2014. The first, pre-series set 01, train was delivered from the J-TREC factory at Niitsu in March 2015, with test-running commencing on the Yamanote Line on 30 March.
Set number 01 entered revenue service on 30 November 2015, with a departure ceremony at Osaki Station, but was taken out of service later the same day following faults with door-close indicators and problems stopping at the correct position along the station platform. Test running on the Yamanote Line resumed from 27 December. The train returned to revenue service on the Yamanote Line on 7 March 2016.
In June 2016, JR East announced its official plans for the introduction of a fleet of 49 full-production sets (539 vehicles) between spring 2017 and spring 2020. Some units will be built as 10-car sets and use converted former E231-500 series SaHa E231-4600 cars, while some units will be built as 11-car sets. The first full-production standard set, 02, was delivered from the J-TREC factory in Niitsu in April 2017. This entered service on 22 May 2017.
The build details for the fleet are as follows.
|Set No.||Manufacturer||Date delivered||Notes|
|01||J-TREC Niitsu||23 March 2015||Pre-series set|
|02||J-TREC Niitsu||12 April 2017|
|03||J-TREC Niitsu||26 April 2017|
|04||J-TREC Niitsu||18 May 2017||Built as 11-car set.|
|05||J-TREC Niitsu||6 June 2017||Built as 11-car set.|
|06||J-TREC Niitsu||16 June 2017|
|07||J-TREC Niitsu||29 June 2017|
|08||J-TREC Niitsu||7 September 2017|
|09||J-TREC Niitsu||25 September 2017|
|10||J-TREC Niitsu||10 October 2017|
|11||J-TREC Niitsu||31 October 2017|
|12||J-TREC Niitsu||15 November 2017|
|13||J-TREC Niitsu||22 December 2017|
- "JR東日本，E235系量産先行車を新造" [JR East to build new E235 series prototype train]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 2 July 2014. Retrieved 2 July 2014.
- Mizutani, Keisuke (July 2015). E235系一般形直流電車 [E235 series general-purpose DC EMU]. Japan Railfan Magazine (in Japanese). Vol. 55 no. 651. Japan: Koyusha Co., Ltd. pp. 92–100.
- "news 2014.07.03" (in Japanese). Japan: Ken Okuyama Design. 3 July 2014. Retrieved 4 July 2014.
- Japan Railway Journal (episode 9). NHK. 2015. Event occurs at 8:58.
- 山手線に次世代通勤電車 Ｅ２３５系トラブル相次ぐ [Problems with E235 series "next-generation commuter train" on Yamanote Line]. Sponichi Annex (in Japanese). Japan: Sports Nippon Newspapers. 30 November 2015. Archived from the original on 8 December 2015. Retrieved 8 June 2016.
- Saito, Masatoshi (2 July 2014). ＪＲ東:山手線に新型電車「Ｅ２３５系」 来秋から導入 [JR East to introduced new E235 series trains on Yamanote Line from next autumn]. Mainichi Shimbun (in Japanese). Japan: The Mainichi Newspapers. Archived from the original on 2 January 2015. Retrieved 8 June 2016.
- Amanuma, Hideaki (September 2017). E235系量産車 [E235 series full-production trains]. Japan Railfan Magazine (in Japanese). Vol. 57 no. 677. Japan: Koyusha Co., Ltd. pp. 48–50.
- 山手線の新型車両「E235系」、11月30日から運行 中吊り広告は存続 [New Yamanote Line E235 series trains to enter service from 30 November - Paper adverts will be retained]. ITmedia Business Online (in Japanese). Japan: ITmedia Inc. 14 October 2015. Archived from the original on 5 December 2015. Retrieved 8 June 2016.
- Kosano, Kagetoshi (23 May 2017). 山手線新型｢E235系｣量産車は何が違うのか [How do the new Yamanote Line E235 series full-production trains differ?]. Toyo Keizai Online (in Japanese). Japan: Toyo Keizai Inc. Archived from the original on 27 May 2017. Retrieved 27 May 2017.
- E235系量産先行車配給輸送 [E235 series pre-series set delivered]. RM News (in Japanese). Japan: Neko Publishing Co., Ltd. 26 March 2015. Archived from the original on 2 April 2015. Retrieved 8 June 2016.
- E235系が山手線で試運転 [E235 series test run on Yamanote Line]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 31 March 2015. Retrieved 31 March 2015.
- E235系が山手線で試運転 [E235 series test run on Yamanote Line]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 8 January 2016. Retrieved 8 January 2016.
- 山手線 新型車両が３か月ぶりに運転再開 [New Yamanote Line train re-enters service after 3 months]. NHK News Web (in Japanese). Japan: NHK. 7 March 2016. Archived from the original on 8 March 2016. Retrieved 7 March 2016.
- 山手線，2020年春ごろまでにE235系量産車539両を導入 [539 E235 series full-production series cars to be introduced on Yamanote Line by around spring 2020]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 8 June 2016. Archived from the original on 8 June 2016. Retrieved 8 June 2016.
- E235系02編成 配給輸送 [E235 series set 02 delivered]. Tetsudo Hobidas (in Japanese). Japan: Neko Publishing. 18 April 2017. Archived from the original on 18 April 2017. Retrieved 18 April 2017.
- JR電車編成表 2018冬 [JR EMU Formations - Winter 2018] (in Japanese). Japan: Kotsu Shimbunsha. 15 November 2017. p. 78. ISBN 978-4-330-84117-5.
- JR車両のうごき [JR rolling stock changes]. Tetsudo Daiya Joho Magazine (in Japanese). Vol. 47 no. 407. Japan: Kotsu Shimbun. March 2018. p. 102.
|Wikimedia Commons has media related to JR East E235.|
- J-TREC press release (in Japanese)