Marunouchi Line
| Tokyo Metro Marunouchi Line | |||
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A Tokyo Metro 02 series EMU
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| Overview | |||
| Other name(s) | Line 4 | ||
| Native name | 東京地下鉄丸ノ内線 | ||
| Type | Rapid transit | ||
| Locale | Tokyo | ||
| Termini |
Ogikubo Ikebukuro |
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| Stations | 28 (including branch line) | ||
| Daily ridership | 1,089,257 (FY2010) | ||
| Operation | |||
| Opened | January 20, 1954 | ||
| Owner | Tokyo Metro | ||
| Depot(s) | Koishikawa, Nakano | ||
| Rolling stock | Tokyo Metro 02 series | ||
| Technical | |||
| Line length | 27.4 km (17.0 mi) | ||
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) | ||
| Electrification | 600 V DC, third rail | ||
| Operating speed | 75 km/h (47 mph) | ||
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The Tokyo Metro Marunouchi Line (東京地下鉄丸ノ内線 Tōkyō Chikatetsu Marunouchi-sen?) is a subway line in Tokyo, Japan, operated by the Tokyo subway operator Tokyo Metro. The line runs in a U-shape between Ogikubo Station in Suginami and Ikebukuro Station in Toshima, with a branch line between Nakano-Sakaue Station and Hōnanchō Station. The official name is Line 4 Marunouchi Line (4号線丸ノ内線 Yon-gōsen Marunouchi-sen?).
The Marunouchi Line is the second line to be built in the city, and the first one constructed after the Second World War. The route is U-shaped, running from Ogikubo Station in the west of the city via the commercial and administrative district of Shinjuku through to the Marunouchi commercial center around Tokyo Station, before turning back and heading to Ikebukuro. Along with the Ginza Line, it is self-enclosed and does not have any through services with other railway lines.
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