E721 series
Japanese train type
title: "E721 series" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["electric-multiple-units-of-japan", "j-trec-multiple-units", "east-japan-railway-company", "20-kv-ac-multiple-units", "train-related-introductions-in-2006", "tokyu-car-multiple-units", "kawasaki-multiple-units", "2-car-emus", "4-car-emus"] description: "Japanese train type" topic_path: "geography/japan" source: "https://en.wikipedia.org/wiki/E721_series" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Japanese train type ::
::data[format=table title="Infobox train"]
| Field | Value |
|---|---|
| name | E721 / SAT721 / AB900 series |
| image | E721&SAT721.JPG |
| caption | E721-0 series (right) and the SAT721 series variant (left), August 2007 |
| manufacturer | Kawasaki Heavy Industries, Tokyu Car Corporation, J-TREC |
| replaced | 417, 455, 717 and 719 series |
| yearconstruction | 2006– |
| yearservice | February 2007 |
| numberconstruction | 36 vehicles (9 sets) |
| numberbuilt | 146 vehicles (63 sets) |
| numberservice | 142 vehicles (61 sets) |
| numberscrapped | 4 vehicles (2 sets, tsunami damage) |
| formation | 2 or 4 cars per set |
| fleetnumbers | P1–P44, P501–P504, P4-1–P4-19, SA101–SA103 |
| operator | JR East |
| Sendai Airport Transit (SAT721) | |
| Abukuma Express (AB900) | |
| depots | Sendai |
| lines | {{Plainlist |
| carbody | Stainless steel |
| carlength | 20,000 mm |
| width | 2,950 mm |
| floorheight | 950 mm |
| doors | 3 pairs per side |
| maxspeed | 120 km/h |
| poweroutput | 125 kW per motor |
| electricsystem | |
| collectionmethod | Pantograph |
| bogies | DT72 (motored), TR256 (trailer) |
| safety | ATS-Ps |
| multipleworking | 701 series |
| gauge | |
| :: |
| name = E721 / SAT721 / AB900 series | image = E721&SAT721.JPG | caption = E721-0 series (right) and the SAT721 series variant (left), August 2007 | service = | manufacturer = Kawasaki Heavy Industries, Tokyu Car Corporation, J-TREC | factory = | family = | replaced = 417, 455, 717 and 719 series | yearconstruction = 2006– | yearservice = February 2007 | refurbishment = | yearscrapped = | numberconstruction = 36 vehicles (9 sets) | numberbuilt = 146 vehicles (63 sets) | numberservice = 142 vehicles (61 sets) | numberpreserved = | numberscrapped = 4 vehicles (2 sets, tsunami damage) | formation = 2 or 4 cars per set | fleetnumbers = P1–P44, P501–P504, P4-1–P4-19, SA101–SA103 | capacity = | operator = JR East Sendai Airport Transit (SAT721) Abukuma Express (AB900) | depots = Sendai | lines = {{Plainlist|
- Tōhoku Main Line
- Jōban Line
- Senzan Line
- Sendai Airport Line
- Abukuma Express Line | carbody = Stainless steel | carlength = 20,000 mm | width = 2,950 mm | height = | floorheight = 950 mm | doors = 3 pairs per side | maxspeed = 120 km/h | weight = | acceleration = | deceleration = | traction = | poweroutput = 125 kW per motor | transmission = | aux = | powersupply = | hvac = | electricsystem = | collectionmethod = Pantograph | bogies = DT72 (motored), TR256 (trailer) | brakes = | safety = ATS-Ps | coupling = | multipleworking = 701 series | gauge =
The E721 series is an AC electric multiple unit (EMU) train type operated by East Japan Railway Company (JR East) on services in the Sendai area of Japan since February 2007.
Variants
- E721-0 series 2-car sets, since February 2007
- E721-500 series 2-car sets, since March 2007
- E721-1000 series 4-car sets, since November 2016
- SAT721 series 2-car sets, since March 2007 (owned by Sendai Airport Transit)
- AB900 series 2-car sets, since July 2019
File:JRE EC721-0 20070325 001.jpg|E721-0 series set P-4 in March 2007 File:JRE E721 500.JPG|E721-500 series set P-502 in November 2007 File:JR-East-E721-1000.jpg|E721-1000 series set P4-14 in January 2017 File:SAT-721.JPG|SAT721 series set SA102 in March 2008 File:Abukuma-kyuko-AB900-AB1-20190221-133537.jpg|AB900 series set AB-1 on delivery at Zushi Station in February 2019
Operations
- Banetsu West Line (since March 2017)
- Joban Line
- Senzan Line
- Sendai Airport Line (E721-500 series and SAT721 series only)
- Tohoku Main Line
- Abukuma Express Line (AB900 series)
Formations
, the fleet consists of 42 two-car E721-0 series sets (P-2 to P-44), four E721-500 series two-car sets (P-501 to P-504), and three SAT721 series two-car sets (SA101 to SA103), formed as follows with one motored (Mc) and one trailer (Tc') car.
E721-0 series
::data[format=table]
| Designation | Numbering |
|---|---|
| Mc | Tc' |
| KuMoHa E721-xx | KuHa E720-xx |
| :: |
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
E721-500 series
::data[format=table]
| Designation | Numbering |
|---|---|
| Mc | Tc' |
| KuMoHa E721-50x | KuHa E720-50x |
| :: |
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
E721-1000 series
The 19 four-car E721-1000 series sets (P4-1 to P4-19) are formed as follows, with two motored ("M") cars and two non-powered trailer ("T") cars. The KuHa E720 is located at the southern end.
::data[format=table]
| Designation | Numbering | Weight (t) | Capacity (seated/total) |
|---|---|---|---|
| Tc' | M | T | Mc |
| KuHa E720-10xx | MoHa E721-10xx | SaHa E721-10xx | KuMoHa E7210-10xx |
| 34.3 | 32.0 | 37.2 | 39.1 |
| 50/132 | 62/152 | 56/138 | |
| :: |
The two motored cars (KuMoHa and MoHa) each have one PS109 single-arm pantograph. The KuHa cars have a toilet.
File:JR East E721-1000 series P4-5 interior 20170108.jpg|The interior of car KuMoHa E721-1005 of set P4-5 in January 2017 File:JR East E721-1000 series LED information board 20170108.jpg|An LED passenger information panel above the doorway in car KuMoHa E721-1005 of set P4-5 in January 2017
SAT721 series
The two-car SAT721 series sets are formed as follows.
::data[format=table]
| Designation | Numbering |
|---|---|
| Mc | Tc' |
| SAT721-10x | SAT720-10x |
| :: |
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
File:SAT721Train interior.jpg|The interior of car SAT721-101 in April 2017 File:SAT721Train carrycasespace.jpg|Priority seating and luggage space in car SAT721-101 in April 2017
AB900 series
The Abukuma Express AB900 series are derived from the E721-500 and SAT721 series used for JR East.
Sets are formed as follows.
::data[format=table] | Set | AB-1 | AB-2 | AB-3 | date=16 March 2023 |title=阿武隈急行AB900系4・5号車、3/18運行開始 - フリー乗車券限定発売 |trans-title=Abukuma Express AB900 Series 4 and 5 Cars Commence Operation on March 18 - Unlimited Ticket Release |url=https://news.mynavi.jp/article/20230316-2627128/ |access-date=18 March 2023 |website=MyNavi Corporation |language=ja}} | AB-5 | |---|---|---|---|---|---| | Numbering | | | | | | | AB901-1 | AB900-1 | | | | | | AB901-2 | AB900-2 | | | | | | AB901-3 | AB900-3 | | | | | | AB901-4 | AB900-4 | | | | | | AB901-5 | AB900-5 | | | | | ::
History
The first E721-0 series sets were delivered from December 2006, and entered service on 1 February 2007 on Tohoku Main Line services. The first E721-500 and SAT721 series sets were delivered from February 2006 and entered service on Sendai Airport services on 18 March 2007.
Two sets, P-1 and P-19, were derailed and badly damaged by the 2011 Tōhoku earthquake and tsunami on 11 March 2011 while at Shinchi Station. Both sets were written off and scrapped.
File:Shinchi Sta 20110404.jpg|The remains of sets P-1 and P-19 at Shinchi Station after the tsunami in 2011
::figure[src="https://upload.wikimedia.org/wikipedia/commons/e/e4/E721-1000_intermediate_cars_Jimmuji_20160923.jpg" caption="Intermediate cars for the first two E721-1000 sets on delivery from J-TREC Niitsu in September 2016"] ::
The first of a fleet of 19 new four-car E721-1000 sets (76 vehicles in total) was introduced on 30 November 2016 on Tohoku Main Line, Joban Line, and Senzan Line services, replacing older 719 series units. The new trains are built by J-TREC, with construction shared between the company's Yokohama and Niitsu factories. These trains feature LED interior lighting.
The first four E721-1000 series intermediate cars were delivered from J-TREC's Niitsu factory to its Yokohama factory in September 2016 to be combined with driving cars built there.
In order to replace their 8100 series trains, Abukuma Express announced the order of new AB900 series trains in summer 2018. They are based on the E721 series, and are the first new trains for Abukuma Express since 1988. The first AB900 series set was delivered in February 2019. It entered service on 1 July 2019.
Fleet/build details
The manufacturers and delivery dates for the fleet are as shown below.
E721-0 series
::data[format=table]
| Set No. | Manufacturer | Date delivered | Date withdrawn |
|---|---|---|---|
| P-1 | Kawasaki Heavy Industries | script-title=ja: JR電車編成表 2010夏 | trans-title=JR EMU Formations – Summer 2010 |
| P-2 | 17 January 2007 | ||
| P-3 | |||
| P-4 | |||
| P-5 | Tokyu Car | 18 December 2006 | |
| P-6 | |||
| P-7 | Kawasaki Heavy Industries | 15 January 2007 | |
| P-8 | 6 February 2007 | ||
| P-9 | |||
| P-10 | 23 February 2007 | ||
| P-11 | |||
| P-12 | Tokyu Car | 15 January 2007 | |
| P-13 | |||
| P-14 | Kawasaki Heavy Industries | 28 February 2007 | |
| P-15 | |||
| P-16 | 8 March 2007 | ||
| P-17 | |||
| P-18 | 23 March 2007 | ||
| P-19 | 23 March 2007 | 12 March 2011 | |
| P-20 | 23 March 2007 | ||
| P-21 | |||
| P-22 | 17 April 2007 | ||
| P-23 | |||
| P-24 | 27 April 2007 | ||
| P-25 | |||
| P-26 | |||
| P-27 | |||
| P-28 | 31 May 2007 | ||
| P-29 | |||
| P-30 | |||
| P-31 | |||
| P-32 | 6 July 2007 | ||
| P-33 | |||
| P-34 | Tokyu Car | 30 August 2007 | |
| P-35 | |||
| P-36 | 26 September 2007 | ||
| P-37 | |||
| P-38 | Kawasaki Heavy Industries | 2 November 2007 | |
| P-39 | |||
| P-40 | 13 September 2010 | ||
| P-41 | |||
| P-42 | |||
| P-43 | |||
| P-44 | |||
| :: |
E721-500 series
The delivery of E721-500 series cars are as follows: ::data[format=table]
| Set No. | Manufacturer | Date delivered |
|---|---|---|
| P-501 | Kawasaki Heavy Industries | 17 February 2006 |
| P-502 | 30 September 2006 | |
| P-503 | ||
| P-504 | Tokyu Car | 25 October 2006 |
| :: |
E721-1000 series
All manufactured by J-TREC. ::data[format=table]
| Set No. | Date delivered |
|---|---|
| P4-1 | script-title=ja: JR車両のうごき |
| P4-2 | 26 October 2016 |
| P4-3 | 11 November 2016 |
| P4-4 | 16 November 2016 |
| P4-5 | 28 November 2016 |
| P4-6 | 1 December 2016 |
| P4-7 | 6 December 2016 |
| P4-8 | 14 December 2016 |
| P4-9 | 27 December 2016 |
| P4-10 | 26 December 2016 |
| P4-11 | |
| P4-12 | |
| P4-13 | |
| P4-14 | |
| P4-15 | |
| P4-16 | |
| P4-17 | |
| P4-18 | |
| P4-19 | |
| :: |
SAT721 series
::figure[src="https://upload.wikimedia.org/wikipedia/commons/f/f1/SAT721_SA103_Omiya_20061114.JPG" caption="date=March 2023}}"] ::
::data[format=table]
| Set No. |
|---|
| SA101 |
| SA102 |
| SA103 |
| :: |
AB900 series
All sets are manufactured by J-TREC. ::data[format=table]
| Set No. | Date delivered |
|---|---|
| AB-1 | url=https://railf.jp/news/2019/02/21/230000.html |
| AB-2 | url=http://rail.hobidas.com/rmn/archives/2020/02/jrab9002.html |
| AB-3 | 25 January 2022 |
| AB-4 | |
| AB-5 | |
| :: |
References
References
- link. (9 March 2017). Japan Railfan Magazine Online. Koyusha Co., Ltd.
- Kotsu Shimbunsha. (18 November 2015)
- {{cite magazine. One. Akihiro. Koyusha Co., Ltd.. (February 2017)
- (25 January 2022). "阿武隈急行AB900系AB-3編成が甲種輸送される".
- (16 March 2023). "阿武隈急行AB900系4・5号車、3/18運行開始 - フリー乗車券限定発売".
- link. (9 December 2016). Japan Railfan Magazine Online. Koyusha Co., Ltd.
- link. (26 May 2016). News release. East Japan Railway Company Sendai Division
- link. (23 September 2016). Japan Railfan Magazine Online. Koyusha Co., Ltd.
- (21 February 2019). "阿武隈急行の新型車両AB900系電車が完成 JR貨物の「金太郎」にけん引されて福島へ". Excite Japan Co., Ltd..
- (2 July 2019). "『新型車両』始動！ＡＢ９００系 阿武隈急行、開業以来初導入". The Fukushima Minyu Shimbun.
- Kotsu Shimbunsha. (May 2010)
- {{cite magazine. Kotsu Shimbun. (March 2017)
- (21 February 2019). "阿武隈急行AB900系が登場". Koyusha Co., Ltd..
- (20 February 2020). "【JR貨】【阿武隈急行】AB900系第2編成を甲種輸送". Neko Publishing.
- "阿武隈急行AB900系AB-3編成が甲種輸送される".
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