The was a DC electric multiple unit (EMU) train type operated between 1990 and 2016 by the private railway operator Keisei Electric Railway on Cityliner limited express services between Tokyo and in Japan. First entering service in June 1990, the trains replaced the earlier AE series EMUs operating on Skyliner services providing a link between Tokyo and Narita Airport. They had a slant-nosed design with hidden headlamps. Formation The sets were formed as shown below, with six motored (M) cars and two unpowered trailer (T) cars, and car 1 at the Narita end. Cars 2 and 7 were each fitted with two scissors-type pantographs. The "x" in the individual car numbering corresponded to the set number (1 to 7). Cars 1 and 8 were originally designated as smoking cars, but all cars became no-smoking from 17 July 2010. Interior Passenger accommodation consisted of standard class seating only, configured 2+2 abreast with pairs of reclining seats that could be rotated to face the direction of travel. Car 4 was equipped with a toilet and also a wheelchair space. Car 5 had a drink vending machine. History The first trains were introduced from June 1990, replacing the earlier AE series sets. The fleet underwent refurbishment between 2001 and 2003, with modifications internally to improve wheelchair accessibility, and changes to the moquette seat covers. From 17 July 2010, all AE100 series trains were transferred to Cityliner services. Following the reduction in the number of Cityliner services, five of the original seven sets were withdrawn and scrapped between 2010 and 2012, leaving just two sets in operation. From the start of the revised timetable on 5 December 2015, regular Cityliner services were discontinued, leaving the two remaining AE100 series sets without regular duties, although seasonal services were scheduled to continue until the end of January 2016. Two special farewell runs were organized by Keisei Travel on 21 and 28 February 2016, following which the AE100 series trains were officially withdrawn. Preserved examples One car, AE161, is preserved at Sogo Depot in Shisui, Chiba Prefecture. References Keisei Electric Railway Electric multiple units of Japan Train-related introductions in 1990 Nippon Sharyo multiple units 1500 V DC multiple units of Japan