Tobu 9000 series

Tobu 9000/9050 series
Refurbished set 9106, October 2021
ManufacturerTokyu Car Corporation, Fuji Heavy Industries, Alna Koki
Constructed1981–1994
Entered service1981
Refurbished2007–2008
Number built100 vehicles (10 sets)
Number in service90 vehicles (9 sets)
Formation10 cars per trainset
OperatorsTobu Railway
DepotsShinrinkōen
Lines served
Specifications
Car body constructionStainless steel
Car length20 m (65 ft 7 in)
Maximum speed110 km/h (68 mph)
Traction system
Power output150 kW (201 hp) per motor
TransmissionCardan shaft
  • 87:16 (5.43) gear ratio (9000 series)
  • 87:14 (6.21) gear ratio (9050 series)[citation needed]
Acceleration3.3 km/(h⋅s) (2.1 mph/s)
Deceleration3.7 km/(h⋅s) (2.3 mph/s) (service)
4.5 km/(h⋅s) (2.8 mph/s) (emergency)
Electric system(s)1,500 V DC
Current collector(s)Overhead lines
Track gauge1,067 mm (3 ft 6 in)

The Tobu 9000 series (東武9000系, Tōbu 9000-kei) is a DC electric multiple unit (EMU) commuter train type operated by the private railway operator Tobu Railway in Japan since 1981.