Keiyō Line E233-5000 series EMU, July 2010
|Locale||Tokyo, Chiba Prefecture|
|Line length||43 km (27 mi)|
|Track gauge||1,067 mm (3 ft 6 in)|
|Electrification||1,500 V DC overhead catenary|
|Operating speed||100 km/h (62 mph)|
It provides the main rail access to the Tokyo Disney Resort and the Makuhari Messe exhibition center. The terminus at Tōkyō Station is located underground, some distance to the south of the main station complex approximately halfway to Yūrakuchō Station. This means transfer between other lines at Tokyo Station can take between 15 and 20 minutes.
The name Keiyō is derived from the second characters of the names of the locations linked by the line, Tōkyō (東京) and Chiba (千葉). It should not be confused with the Keiō Line, a privately operated commuter line in western Tokyo.
|Tokyo||東京||-||0.0||●||●||●||●||Tōhoku Shinkansen, Jōetsu Shinkansen, Nagano Shinkansen, Yamanote Line, Chūō Line, Tōkaidō Main Line, Sōbu Line (Rapid), Yokosuka Line, Keihin-Tōhoku Line
Tokyo Metro Marunouchi Line (M-17)
|Hatchōbori||八丁堀||1.2||1.2||●||●||●||●||Tokyo Metro Hibiya Line (H-11)||Chūō|
Tokyo Metro Yūrakuchō Line (Y-24)
|Maihama||舞浜||2.1||12.7||●||●||｜||●||Maihama Resort Line: Disney Resort Line (Resort Gateway)||Urayasu||Chiba|
|∥||∥||●||●||Musashino Line (through service), Sōbu Line
Tokyo Metro Tōzai Line (T-23)
Tōyō Rapid Railway Line
Keisei Main Line (Keisei Nishifuna)
|Distance is from Ichikawa-Shiohama||Ichikawa|
|Minami-Funabashi||南船橋||3.4||26.0||●||●||｜||●||Distance between Nishi-Funabashi and Minami-Funabashi is 5.4 km||Funabashi|
|Chiba-Minato||千葉みなと||3.7||39.0||●||●||｜||Chiba Urban Monorail: Line 1||Chūō-ku, Chiba|
|Soga||蘇我||4.0||43.0||●||●||●||Uchibō Line, Sotobō Line (some through services to each)[* 3]|
All Keiyō Line rolling stock is based at the Keiyō Rolling Stock Center near Shin-Narashino Station
The Keiyō Line was initially planned as a freight-only line. Its first section opened in 1975 as a link between the Chiba Freight Terminal Station (now the Mihama New Port Resort between Inage-Kaigan and Chiba-Minato Stations) and the JFE Steel factory near Soga Station. Passenger service began in 1986 between Nishi-Funabashi and Chiba-Minato, and was extended eastward to Soga and westward to Shin-Kiba in 1988.
The final section of the Keiyō Line between Tōkyō and Shin-Kiba opened in 1990. The platforms at Tokyo Station were originally built to accommodate the Narita Shinkansen, a planned (but never built) high-speed rail line between central Tokyo and Narita International Airport.
Planners originally envisioned the Keiyō Line interfacing with the Rinkai Line at Shin-Kiba, thus providing a through rail connection between Chiba and the Tokyo Freight Terminal in eastern Shinagawa, and also completing the outer loop for freight trains around Tokyo formed by the Musashino Line. This original plan would also allow through service with the Tōkaidō Main Line, allowing freight trains from central and western Japan to reach Chiba and points east.
However, in the 1990s, as the artificial island of Odaiba began developing as a commercial and tourist area in the middle of the Rinkai Line route, the Rinkai Line was re-purposed for use as a passenger line. While there is a through connection between the Rinkai Line and the Keiyō Line, it is only used by passenger trains in charter service, usually carrying groups to the Tokyo Disney Resort.
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