The name Keisei is the combination of the kanji 京 from Tokyo (東京)and 成 from Narita (成田), which the railway's main line connects.

The railway's main line runs from Tokyo to Narita and the eastern suburb cities of Funabashi, Narashino, Yachiyo, and Sakura.

[4] On July 17, 2010, Skyliner switched its route to the newly built Narita Sky Access and reduced the travel time by 15 minutes.

[5] On 31 October 2023, Keisei announced plans to acquire its subsidiary Shin-Keisei Electric Railway.

Plans for the renaming of the existing Shin Keisei Line are expected to be revealed at a later date.