| 731 series | |
| Manufacturer: | Kawasaki Heavy Industries, Hitachi |
| Replaced: | 711 series |
| Yearconstruction: | 1996–2006 |
| Yearservice: | 24 December 1996 |
| Numberbuilt: | 63 vehicles (21 sets) |
| Numberservice: | 63 vehicles (21 sets) |
| Formation: | 3 cars per trainset |
| Fleetnumbers: | G-101–121 |
| Depots: | Sapporo |
| Lines: | Hakodate Main Line, Chitose Line |
| Carbody: | Stainless steel |
| Width: | 2800mm |
| Height: | 3620mm |
| Doors: | 3 per side |
| Maxspeed: | 130km/h |
| Electricsystem: | (overhead line) |
| Collectionmethod: | Pantograph |
| Multipleworking: | 721 series, 733 series, 735 series, KiHa 201 series |
The 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.[1]
, 21 three-car sets are in service, numbered G-101 to G121, and based at Sapporo Depot. The trainsets are formed as follows, with one motored intermediate car and two non-powered driving trailer cars.[2]
| Car No. | 1 | 2 | 3 | |
|---|---|---|---|---|
| Designation | Tc' | M | Tc | |
| Numbering | KuHa 731-100 | MoHa 731-100 | KuHa 731-200 | |
| Capacity (total/seated) | 141/50 | 151/52 | 143/50 |
Car 2 is fitted with one N-PS785 single-arm pantograph.[2]
Seating consists of longitudinal bench seating throughout, without the vestibule areas used on the earlier 721 series trains.[1]
A total of 63 vehicles (21 sets) were delivered to Sapporo Depot between 1996 and 2006. The first units entered service from 24 December 1996.[3]
From the start of 22 March 1997 timetable revision, 731 series EMUs were operated in multiple with KiHa 201 series DMU sets over certain routes.[3]
Polycarbonate window protectors were added in 2002, and the original pantographs were replaced with single-arm pantographs between 2004 and 2005.[3]
The individual build histories of the fleet are as follows.[2] [4] [5] [6]
| Set No. | Manufacturer | Delivery date |
|---|---|---|
| G-101 | 12 December 1996 | |
| G-102 | 10 December 1996 | |
| G-103 | 13 December 1996 | |
| G-104 | 14 December 1996 | |
| G-105 | Kawasaki Heavy Industries | 23 February 1998 |
| G-106 | 24 February 1998 | |
| G-107 | ||
| G-108 | 22 March 1998 | |
| G-109 | 23 March 1998 | |
| G-110 | 24 March 1998 | |
| G-111 | 16 December 1998 | |
| G-112 | 17 December 1998 | |
| G-113 | Hitachi | 18 December 1998 |
| G-114 | 19 December 1998 | |
| G-115 | Kawasaki Heavy Industries | 20 December 1999[7] |
| G-116 | ||
| G-117 | 21 December 1999 | |
| G-118 | Hitachi | 13 December 1999 |
| G-119 | ||
| G-120 | Kawasaki Heavy Industries | 6 March 2006[8] |
| G-121 | 5 March 2006 |