185 series

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185 series
A 185 series train on a Shonan Liner rapid service in February 2021
In service	1981–March 2021 (regular service)
Replaced	153 series
Constructed	1981–1982
Entered service	March 1981
Refurbished	1993–1998
Scrapped	2021–
Number built	227 cars
Number in service	12
Successor	E257 series
Formation	5/6/7/10 cars per trainset
Operators	JNR (1981–1987) JR East (1987–Present)
Depots	Ōmiya
Specifications
Car body construction	Steel
Car length	20.28 m (66 ft 6 in) (end cars) 20 m (65 ft 7 in)(intermediate cars)
Width	2,946 mm (9 ft 8.0 in)
Height	4,066 mm (13 ft 4.1 in)
Doors	2 per side
Maximum speed	110 km/h (68.4 mph)
Traction system	Resistor control
Power output	120 kW per traction motor
Electric system(s)	1,500 V DC overhead lines
Current collector(s)	Lozenge-type pantograph[1]
Safety system(s)	ATS-P, ATC, D-ATC
Coupling system	Shibata-type
Multiple working	153 series (until 1983)
Track gauge	1,067 mm (3 ft 6 in)

The 185 series (Japanese: 185系) is an electric multiple unit (EMU) train type operated by the East Japan Railway Company (JR East) primarily on mid-distance limited express services centering on Tokyo.^[2] As of August of 2024, two sets operate as Special Limited Express trains.

The class is broadly divided into two variants: 185-0 series for use south-west of Tokyo, and 185-200 series originally for use north of Tokyo.^[3]