The is a commuter electric multiple unit (EMU) train type operated by the private railway operator Keisei Electric Railway in the Tokyo area of Japan since 1972. It was the operatorâÂÂs first stainless steel train type to be introduced.
The 3500 series sets operate on the Keisei Main Line. The eight-car sets were also used on Toei Asakusa Line and Keikyu line inter-running services until they were split into individual four-car sets in 2014, although the unrefurbished sets were not capable of operating on Keikyu lines.
Originally built as 24 four-car sets, the fleet was subsequently reformed into eight-, six-, and four-car sets.
, the fleet consists of five six-car sets and three four-car sets, as well as one four-car set operated by Shibayama Railway.
The six-car sets are formed as shown below. All cars are motored.
The M1' cars are each fitted with one single-arm pantograph.
The four-car sets are formed as shown below. All cars are motored.
The M1' cars are each fitted with one single-arm pantograph.
Four eight-car sets were formed as shown below. All cars were motored.
The M1' cars were each fitted with one single-arm pantograph.
Seating consists of longitudinal bench seating throughout.
The first 3500 series trains entered service in December 1972.
Major refurbishment of the fleet commenced in 1996, with a total of 56 vehicles refurbished by 2001. Refurbishment involved redesigned front ends with square lights instead of round and upgraded interiors.
Special farewell tours were staged for the last remaining unrefurbished 3500 series set, 3588, on 25 and 26 February 2017.
On 1 April 2013, four-car set 3540 was transferred to Shibayama Railway. The set initially operated in the standard Keisei livery after the transfer, but it was repainted with green and red stripes in April 2022.
On 25 February 2026, Shibayama Railway announced its plans to withdraw its 3500 series set at the end of March of that year. Shibayama Railway announced on 13 March that it would be replaced by a 3600 series four-car set from 1 April.