721 series
From Wikipedia, the free encyclopedia
In service1988–Present
ManufacturerHitachi, JR Hokkaido, Kawasaki Heavy Industries, Tokyu Car
Constructed1988–2003
Scrapped2023–
| 721 series | |
|---|---|
 Set F-4103, August 2024 | |
| In service | 1988–Present |
| Manufacturer | Hitachi, JR Hokkaido, Kawasaki Heavy Industries, Tokyu Car |
| Constructed | 1988–2003 |
| Scrapped | 2023– |
| Number built | 135 vehicles (34 sets) |
| Number in service | 126 vehicles (31 sets) |
| Formation | 3/6 cars per trainset |
| 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 | 2,954 mm (9 ft 8.3 in) |
| Height | 4,090 mm (13 ft 5 in) |
| Doors | 3 per side |
| Maximum speed | 130 km/h (81 mph) |
| Traction system | Thyristor drive (1st-5th batch) GTO–VVVF (6th-7th batch) IGBT–VVVF (8th batch)[1] |
| Electric system(s) | 20 kV 50 Hz AC (overhead line) |
| Safety system(s) | ATS-DN |
| Multiple working | 731 series, 733 series, 735 series |
| Track gauge | 1,067 mm (3 ft 6 in) |
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.[2]
The trains were built jointly by Hitachi, JR Hokkaido (Naebo Factory), Kawasaki Heavy Industries, and Tokyu Car (Yokohama).[3]
Fleet
As of 1 April 2012, the fleet consists of 135 vehicles, formed as 23 3-car sets and 11 6-car sets.[4]
