101 series

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101 series
JNR 6-car set at Asaka Station on the Hanwa Line, 1978
In service	1957–2003
Replaced	72 series
Constructed	1957–1969
Entered service	December 1957
Scrapped	1987–2014 (not all parts are fully scrapped, other remaining parts such as pantographs are still in use in other rolling stocks such as 121 series/7200 series[1] & remodeled 145 series converted from old 101 series EMUs)
Number built	1,535 vehicles
Number in service	None (44 vehicles being converted into 145 series multiple locomotive)
Number preserved	2 vehicles
Number scrapped	1,489 vehicles
Successor	103 series, 205 series, 207 series
Formation	2, 3, 6, 7, 8 or 10 cars per trainset
Operators	JNR (1957–1987) JR East (1987–2003) JR-West (1987–1992) Chichibu Railway (1986–2014)
Specifications
Car body construction	Steel
Car length	20,000 mm (65 ft 7 in)
Width	2,879 mm (9 ft 5.3 in)
Doors	4 pairs per side
Maximum speed	100 km/h (62 mph)
Traction system	Resistor control
Traction motors	MT46
Power output	100 kW (134 hp)
Acceleration	2.0 km/(h⋅s) (1.2 mph/s) (7-car formation) 3.2 km/(h⋅s) (2.0 mph/s) (all motored cars)
Deceleration	3.0 km/(h⋅s) (1.9 mph/s) (service, 7-car set) 3.5 km/(h⋅s) (2.2 mph/s) (emergency)
Electric system(s)	1,500 V DC overhead catenary
Current collector(s)	Pantograph
Bogies	DT21, DT21T, TR64
Track gauge	1,067 mm (3 ft 6 in)

The 101 series (101系, 101-kei) was a DC electric multiple unit (EMU) commuter train type introduced in 1957 by Japanese National Railways (JNR), and formerly operated by East Japan Railway Company (JR East) and West Japan Railway Company (JR-West). The last remaining trains were withdrawn in November 2003.