721 series

The 721 series (721系) is an AC electric multiple unit (EMU) operated by Hokkaido Railway Company (JR Hokkaido) on Sapporo area suburban services in Hokkaido, Japan since 1988.[1]

721 series
A pair of 721 series 3-car sets led by set F-3, August 2008
In service	1988–Present
Manufacturer	Hitachi, JR Hokkaido, Kawasaki Heavy Industries, Tokyu Car
Constructed	1988–2003
Number built	135 vehicles (34 sets)
Number in service	135 vehicles (34 sets)
Formation	3/6 cars per trainset
Operator(s)	JR Hokkaido
Depot(s)	Sapporo
Line(s) served	Hakodate Main Line, Chitose Line
Specifications
Car body construction	Stainless steel
Car length	21,670 mm (71 ft 1 in) (end cars) 21,300 mm (69 ft 11 in) (intermediate cars)
Width	2,954 mm (9 ft 8.3 in)
Height	4,090 mm (13 ft 5 in)
Doors	3 per side
Maximum speed	130 km/h (80 mph)
Traction system	Thyristor drive (1-5th batch) GTO-VVVF (6th batch onwards)
Electric system(s)	20 kV AC (50 Hz)
Current collection method	Overhead line
Safety system(s)	ATS-DN
Multiple working	731 series, 733 series, 735 series
Track gauge	1,067 mm (3 ft 6 in)

Design

The trains were built jointly by Hitachi, JR Hokkaido (Naebo Factory), Kawasaki Heavy Industries, and Tokyu Car (Yokohama).[2]

Fleet

As of 1 April 2012, the fleet consists of 135 vehicles, formed as 23 3-car sets and 11 6-car sets.[3]

Variants

• 721-0 series
• 721-1000 series
• 721-2000 series
• 721-3000 series
• 721-4000 series
• 721-5000 series

References

1. JR全車輌ハンドブック2009 [JR Rolling Stock Handbook 2009]. Japan: Neko Publishing. 2009. pp. 312–318. ISBN 978-4-7770-0836-0.
2. Saka, Masahiro (March 2014). "JR第1世代の車両・現況と概要" [JR 1st-generation rolling stock: Current situation and overview]. Tetsudō Daiya Jōhō Magazine (in Japanese). 43 (359): 22.
3. JR電車編成表 2012夏 [JR EMU Formations - Summer 2012]. Japan: JRR. May 2012. pp. 6–7. ISBN 978-4-330-28612-9.