The is an electric multiple unit (EMU) train type operated by the private railway operator Keisei Electric Railway. The type was introduced by the Shin-Keisei Electric Railway on the Shin-Keisei Line in Chiba Prefecture, Japan, in September 1993.
, the fleet consists of three eight-car sets based at Kunugiyama Depot with four motored (M) cars and four trailer (T) cars, formed as shown below, with the Tc1 car at the Tsudanuma end.
The sets were built by Nippon Sharyo in Aichi Prefecture, with the first set entering service on 26 September 1993. The second set entered service on 29 February 1996, and the third set entered service on 25 June 1996.
In 2014, set 8911 was reduced to six cars and repainted in the new pink corporate colour scheme. Set 8921 followed as such in September that year. By 30 September, all three sets were shortened to six cars and repainted the new livery.
On 1 April 2025, all sets were transferred to Keisei following its acquisition of the Shin-Keisei Electric Railway. The first set to receive the standard Keisei livery was set 8931, unveiled on 24 December of that year.