731 series

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731 series
731 series set G-116 in August 2009
Manufacturer	Kawasaki Heavy Industries, Hitachi[1]
Replaced	711 series
Constructed	1996–2006
Entered service	24 December 1996
Number built	63 vehicles (21 sets)
Number in service	63 vehicles (21 sets)
Formation	3 cars per trainset
Fleet numbers	G-101–121
Operators	JR Hokkaido
Depots	Sapporo
Lines 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	2,800 mm (9 ft 2 in)
Height	3,620 mm (11 ft 11 in)
Doors	3 per side
Maximum speed	130 km/h (81 mph)
Electric system(s)	20 kV 50 Hz AC (overhead line)
Current collector(s)	Pantograph
Multiple working	721 series, 733 series, 735 series, KiHa 201 series
Track gauge	1,067 mm (3 ft 6 in)

The 731 series (731系) is an AC electric multiple unit (EMU) train type operated by Hokkaido Railway Company (JR Hokkaido) on Sapporo area suburban services in Hokkaido, Japan since 1996.^[2]