# Keisei Electric Railway

The Keisei Electric Railway Company, Ltd. (stylized as K'SEI since 2001) is a major private railway in Chiba Prefecture and Tokyo, Japan. 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 combination uses different readings than the ones used in the city names. 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 limited 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 controlling share of the Oriental Land Company which owns and manages the Tokyo Disney Resort. Keisei is listed on the Tokyo Stock Exchange and is a constituent of the Nikkei 225 index.

## History

Keisei was founded on June 30, 1909 and began services on November 3, 1912, initially operating local train service in eastern Tokyo. Its main line reached Narita in 1930 and Ueno in 1933.
Originally a narrow gauge (1,372 mm or 4 ft 6 in Scotch gauge) operator, Keisei converted to 1,435 mm (4 ft 8+1⁄2 in) 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. On July 17, 2010, Skyliner switched its route to the newly built Narita Sky Access and reduced the travel time by 15 minutes.

### Future plans

On 31 October 2023, Keisei announced plans to acquire its subsidiary Shin-Keisei Electric Railway. The acquisition is expected to be completed by April 2025. Plans for the renaming of the existing Shin Keisei Line are expected to be revealed at a later date.

## Lines

Keisei operates 152.8 km (94.9 mi) of railway that consists of one trunk line named the Main Line and six branch lines.
| Line name | Japanese | Endpoints | Distance | Type$^1$ |
| Main Line | 本線 | Keisei-Ueno – Komaino Junction | 67.2 km (41.8 mi) | 1 |
| Main Line | 本線 | Komaino Junction – Narita Airport Terminal 1 | 2.1 km (1.3 mi) | 2 |
| Oshiage Line | 押上線 | Oshiage – Aoto | 5.7 km (3.5 mi) | 1 |
| Chiba Line | 千葉線 | Keisei-Tsudanuma – Chiba Chūō | 12.9 km (8.0 mi) | 1 |
| Chihara Line | 千原線 | Chiba Chūō – Chiharadai | 10.9 km (6.8 mi) | 1 |
| Higashi-Narita Line | 東成田線 | Keisei-Narita – Higashi-Narita | 7.1 km (4.4 mi) | 1 |
| Kanamachi Line | 金町線 | Keisei-Takasago – Keisei-Kanamachi | 2.5 km (1.6 mi) | 1 |
| Narita Airport Line (Narita Sky Access) | 成田空港線 | Keisei-Takasago – Narita Airport Terminal 1 | 51.4 km (31.9 mi) | 2 |
| Overlap | Overlap | Keisei-Narita – Komaino Junction$^2$ | (6.0 km (3.7 mi)) | 1 |
| Overlap | Overlap | Narita Airport Terminal 2·3 – Narita Airport Terminal 1$^3$ | (1.0 km (0.6 mi)) | 2 |
| Total | Total | Total | 152.8 km (94.9 mi) | |
| Projected lines (exp. 2029) |||||
| (Chihara Line extension) | | Chiharadai – Amaariki | 8.2 km (5.1 mi) | 1 |
Legend
* "Type" indicates the type of railway business under the Railway Business Act of Japan. Type 1 operator owns and operates the railway while Type 2 operator operates but does not owns the railway.
* This section is shared by the Main Line and the Higashi-Narita Line.
* This section is shared by the Main Line and the Narita Airport Line.

## Subsidiaries

Keisei Group includes:
* Shin-Keisei Electric Railway (Shin-Keisei Line)
* Chiba New Town Railway
* Hokusō Railway (Hokusō Line)
* Kantō Railway
* Kashima Railway Company (Kashima Railway Line, closed in 2007)
* Kominato Railway (Kominato Line)
* Maihama Resort Line (Disney Resort Line)
* Narita Airport Rapid Railway (Owner of a part of Narita Sky Access tracks)
* Nokogiriyama Ropeway
* The Oriental Land Company
* Tsukuba Kankō Railway (Mt. Tsukuba Cable Car and Mt. Tsukuba Ropeway)
Companies related to Keisei, although not a group member:
* Shibayama Railway
* Tōyō Rapid Railway (Tōyō Rapid Railway Line)

## Rolling stock
### Limited express

* AE series (since 2010)
* AE series

### Commuter

* 3000 series (since 2003)
* 3050 series (since 2010)
* 3100 series (since 2019)
* 3200 series (since 2025)
* 3400 series (since 1993)
* 3500 series (since 1972)
* 3600 series (since 1982)
* 3700 series (since 1991)
* 3000 series
* 3050 series
* 3100 series
* 3400 series
* 3500 series
* 3600 series
* 3700 series

### Former
#### Limited express

* 1500 series (1941–1987)
* 1600 series (1953–1981)
* AE series (1973–1993)
* AE100 series (1990–2016)
* AE series
* AE100 series

#### Commuter

* 1 series (1912-1927)
* 20 series (1921-1971)
* 33/39/45 series (1923-1978)
* 300 series (1955-1982)
* 100/126 series (1926-1987)
* 200/210/220/500/510 series (1931-1990)
* 210/2000/2100 series (1932-1985)
* 700/2200 series (1954-1982)
* 750/2250 series (1954-1973)
* 1100 series (1941-1987)
* 1500 series (1941-1987)
* 2000 series (1948-1990)
* 3000 series (1958-1991)
* 3050 series (1959-1995)
* 3100 series (1960-1998)
* 3150 series (1963-2001)
* 3200 series (1964-2007)
* 3300 series (1968-2015)
* 3200 series
* 3300 series