[4] The first trains were introduced from June 1990, replacing the earlier AE series sets.

[5] The fleet underwent refurbishment between 2001 and 2003,[5] with modifications internally to improve wheelchair accessibility, and changes to the moquette seat covers.

[5] 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.

[6] Two special farewell runs were organized by Keisei Travel on 21 and 28 February 2016, following which the AE100 series trains were officially withdrawn.

[7] One car, AE161, is preserved at Sogo Depot in Shisui, Chiba Prefecture.