Seibu 10000 series

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Seibu 10000 series
10000 series between Higashi-Agano & Agano in September 2019
Replaced5000 series
Entered service6 December 1993
Number built84 vehicles (12 sets)
Number in service84 vehicles (12 sets)
SuccessorSeibu 001 series
Formation7 cars per trainset
Operator(s)Seibu Railway
Depot(s)Kotesashi, Minami-Iriso
Line(s) servedSeibu Ikebukuro Line, Seibu Shinjuku Line
Car length20 m (65 ft 7 in)
DoorsOne per side
Maximum speed105 km/h (65 mph)
Traction systemResistor control
Variable frequency (3-level IGBT) (set 10112)
Electric system(s)1,500 V DC
Current collection methodOverhead line
Braking system(s)Dynamic braking
Track gauge1,067 mm (3 ft 6 in)

The Seibu 10000 series (西武10000系) is an electric multiple unit (EMU) train type operated by the private railway operator Seibu Railway on limited express services in the Tokyo area of Japan since 1993.[1]


Branded as "NRA" or "New Red Arrow", the trains are used on Koedo services from Seibu-Shinjuku in Tokyo to Hon-Kawagoe and on Musashi and Chichibu services from Ikebukuro in Tokyo to Hannō and Seibu Chichibu Station.[1]


As of 1 April 2012, the fleet consists of 12 7-car sets, formed as follows.[2]

Car No. 1 2 3 4 5 6 7
Designation Tc1 M1 M2 T M3 M4 Tc2
Numbering 10100 10200 10300 10400 10500 10600 10700

Cars 2, 5, and 6 each have one single-arm pantograph, except set 10112, which has pantographs on cars 2 and 5 only.[2]


The first two trains delivered were introduced in December 1993 on Koedo services from Seibu-Shinjuku in Tokyo to Hon-Kawagoe, replacing the former 5000 series Red Arrow trains.[3]

A further three trainsets were delivered in 1994 and introduced on Chichibu services from Ikebukuro in Tokyo to Seibu-Chichibu on 15 October 1994.[3]

The trains were refurbished internally between 2003 and 2008, and the old seats were re-used in Chichibu Railway 6000 series and Izukyu 8000 series trainsets.[4]


The sets are monoclass with 2+2 abreast reclining seating. Seat pitch is 1,070 mm (42 in).[4]

Livery variations[edit]


  1. ^ a b 私鉄車両年鑑 2012: 大手15社営業用車両完全網羅 私鉄車両年鑑2012 [Japan Private Railways Annual 2012]. Tokyo, Japan: Ikaros Publications Ltd. February 2012. p. 183. ISBN 978-4-86320-549-9.
  2. ^ a b 私鉄車両編成表 2012 [Private Railway Rolling Stock Formations - 2012]. Japan: JRR. July 2012. pp. 60–62. ISBN 978-4-330-29911-2.
  3. ^ a b 年鑑'95日本の鉄道 [Yearbook 1995: Japanese Railways]. Japan: Railway Journal. April 1995.
  4. ^ a b 2011西武電車最新ガイド [2011 Seibu EMU Guide]. Tetsudō Daiya Jōhō Magazine. Vol. 40 no. 322. Japan: Kōtsū Shimbun. February 2011. pp. 7–35.

External links[edit]