In service February 2007–Present Number under construction 36 vehicles (9 sets) | Constructed 2006–2017 Number built 142 vehicles (61 sets) | |
 | ||
Replaced | ||
The E721 series (E721系) is an 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.
Contents
Variants
Operations
Formations
As of 1 October 2015, 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
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
E721-500 series
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.
The two motored cars (KuMoHa and MoHa) each have one PS109 single-arm pantograph. The KuHa cars have a toilet.
SAT721 series
The two-car SAT721 series sets are formed as follows.
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
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and badly damaged by the 2011 Tōhoku earthquake and tsunami on 11 March 2011 while at Shinchi Station, and were withdrawn.
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.
Fleet/build details
The manufacturers and delivery dates for the fleet are as shown below.