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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]
| 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) |
Design
editThe trains were built jointly by Hitachi, JR Hokkaido (Naebo Factory), Kawasaki Heavy Industries, and Tokyu Car (Yokohama).[3]
Fleet
editAs of 1 April 2012, the fleet consists of 135 vehicles, formed as 23 3-car sets and 11 6-car sets.[4]
Variants
edit- 721-0 series
- 721-1000 series
- 721-2000 series
- 721-3000 series
- 721-4000 series
- 721-5000 series
Withdrawal
editWithdrawals of the 721 series commenced in 2023 with 721-3000 series set F-3016 being scrapped as of August.[5] This continued the following year with sets F-4 and F-3015 being sent to Naebo for scrapping in April 2024.[6][7]
In April 2024, JR Hokkaido announced that it will replace the 721 series with additional 733 series trains on Chitose Line Airport services.[8]
References
edit
Wikimedia Commons has media related to JR Hokkaido 721.
- ^ "新車ガイド1：全室「uシート」化改造車とともに導入 721系8次車". 鉄道ファン. 43 (12). Koyusha: 64–69. 1 December 2003.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "【もうそんな時代か…】721系の解体を開始【JR北海道】" [[Is it that time already?] Dismantling of 721 series begins [JR Hokkaido]]. RM News (in Japanese). Japan: Neko Publishing. 29 August 2023. Retrieved 24 April 2024.
- ^ "【解体待ちか？】721系F-4編成苗穂工場入場" [[Awaiting demolition?] 721 series set F-4 entered Naebo factory]. RM News (in Japanese). Japan: Neko Publishing. 11 April 2024. Retrieved 10 May 2024.
- ^ "【JR北海道】721系F-3015編成が苗穂工場へ廃車入場" [[JR Hokkaido] 721 series set F-3015 enters Naebo factory for scrapping]. RM News (in Japanese). Japan: Neko Publishing. 25 April 2024. Retrieved 10 May 2024.
- ^ JR北海道、733系増備で721系置換え - 新幹線札幌開業後に速達化も [JR Hokkaido to replace 721 series with additional 733 series trains - Speeding up service after opening of Sapporo Shinkansen line]. Mynavi News (in Japanese). 4 April 2024. Retrieved 10 May 2024.