The 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.
Operations Branded as "NRA" or "New Red Arrow", the trains are used on Koedo services from Seibu-Shinjuku in Tokyo to Hon-Kawagoe. They were formerly also used on Musashi and Chichibu services from Ikebukuro in Tokyo to Hannō and Seibu-Chichibu stations.
Formation As of 1 April 2012, the fleet consists of 12 7-car sets, formed as follows.
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.
History 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.
A further three trainsets were delivered in 1994 and introduced on Chichibu services from Ikebukuro in Tokyo to Seibu-Chichibu on 15 October 1994.
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.
On 13 March 2020, the 10000 series trainsets were withdrawn from Ikebukuro Line and Chichibu Line limited express services, being replaced by 001 series Laview trainsets. Since then, the fleet of 10000 series has been used on limited express service on the Seibu Shinjuku Line.
Three cars were transferred to the Toyama Chihō Railway in October 2020. After spending 2021 undergoing preparation, they entered service on 19 February 2022.
Future In February 2026, Seibu announced its plans to replace the 10000 series on Shinjuku Line limited-express services with new trains based on the 40000 series design beginning in the first quarter of 2027. The operator also announced on 21 April of that year that it plans to modify set 10112 for use as a sightseeing limited express train on the Shinjuku Line; the set is scheduled to enter revenue service in fiscal 2028.
Interior The sets are monoclass with 2+2 abreast reclining seating. Seat pitch is .
Livery variations
Notes
References
External links
Seibu 10000 series "New Red Arrow"