Keikyu Daishi Line services are operated by 4-car electric multiple unit (EMU) trains, stopping at all stations between Keikyū Kawasaki and Kojimashinden. During the weekday offpeak, trains run at 10-minute intervals, increased to 5-minute intervals during the morning and evening peaks.
A train passing the abandoned Rokugōbashi Station, July 2011
The line was opened on 21 January 1899 by the Daishi Electric Railway (大師電気鉄道?), as a standard gauge line electified at 600 V DC, running between Kawasaki Station (later renamed Rokugōbashi Station (六郷橋駅?), which closed in 1949) and Daishi Station (later renamed Kawasaki-Daishi Station). The company was renamed Keihin Electric Railway (京浜電気鉄道?) on 25 April 1899. The line was double-tracked over its entire length from 29 November the same year. The line was extended from Rokugōbashi Station to the present-day Keikyu Kawasaki Station on 1 September 1902.
The overhead line voltage was raised from the original 600 V DC to 1,500 V DC on 16 March 1951.