The is a major private railway in Chiba and Tokyo, Japan. The name Keisei is the combination of contractions of "Tokyo (Capital)" Kei and "Narita" sei which the railways main line connects. The railway's main line runs from Tokyo to Narita and the eastern suburb cities of Funabashi, Narashino, Yachiyo, and Sakura. Keisei runs an airport express train called the Skyliner from Ueno and Nippori to Narita International Airport.
In addition to its railway business, the Keisei Electric Railway Company owns large bus and taxi services and some real estate holdings. It owns a large share of the Oriental Land Company which manages the Tokyo Disney Resort.
Originally a narrow gauge operator, Keisei converted to standard gauge in 1959. In 1960, Keisei began through service with the Toei Asakusa Line, the first interline through service arrangement in Japan.
Skyliner service began in 1973 and started serving the airport in 1978, when the first Narita Airport Station opened (today's Higashi-Narita station). A new underground station was opened in 1991 to provide a more direct connection to terminal 1, and in 1992 service began to terminal 2.
| Line name | Japanese | Endpoints | Distance (km) | Type1 |
|---|---|---|---|---|
| Main Line | 本線 | – (Komaino Junction) | 67.2 | 1 |
| (Komaino Junction) – | 2.1 | 2 | ||
| Oshiage Line | 押上線 | Oshiage – Aoto | 5.7 | 1 |
| Chiba Line | 千葉線 | Keisei-Tsudanuma – Chiba Chūō | 12.9 | 1 |
| Chihara Line | 千原線 | Chiba Chūō – Chiharadai | 10.9 | 1 |
| Higashi-Narita Line | 東成田線 | Keisei-Narita – Higashi-narita | 7.1 | 1 |
| Kanamachi Line | 金町線 | Keisei-Takasago – Keisei-Kanamachi | 2.5 | 1 |
| Total | 102.4 | |||
| Projected lines | ||||
| (Chihara Line extension) | Chiharadai – Amaariki | 8.2 | 1 | |
| (Narita Rapid Railway) | Keisei Takasago – Narita Airport | 51.4 | 2 | |
Companies related to Keisei, although not a group member: