Tokyo Metro Marunouchi Line

Tokyo Metro Marunouchi Line
Marunouchi Line 2000 series trains at Yotsuya Station
Overview
Other name(s)	Line 4 / M (Main line) / Mb (Branch line)
Native name	東京メトロ丸ノ内線
Owner	Tokyo Metro
Line number	4
Locale	Tokyo
Termini	Ogikubo (Main) / Honancho (Branch) Ikebukuro (Main) / Nakano-sakaue (Branch)
Stations	28 (including branch line)
Color on map	Red (#F62E36)
Service
Type	Rapid transit
System	Tokyo subway
Depot(s)	Koishikawa, Nakano
Rolling stock	2000 series
Daily ridership	1,159,898 (2017)[1]
History
Opened	January 20, 1954; 71 years ago (1954-01-20)
Technical
Line length	27.4 km (17.0 mi) (Main line) 3.2 km (2.0 mi) (Branch Line)
Number of tracks	Double-track
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Minimum radius	140 m (460 ft) (Main line: Near Ginza) 125 m (410 ft) (Branch Line)
Electrification	600 V DC (third rail)
Operating speed	75 km/h (47 mph) (Main line) 65 km/h (40 mph) (Branch line)
Signalling	Tokyo Metro CS-ATC Communications-based train control
Maximum incline	3.5%
Route map Legend 0.0 – M-01 Ogikubo JCJB Chūō Main, Chūō-Sōbu lines 1.5 – M-02 Minami-Asagaya 2.7 – M-03 Shin-Kōenji 3.6 – M-04 Higashi-Kōenji 4.6 – M-05 Shin-Nakano – 0.0 Mb-03 Hōnanchō Nakano Depot – 1.3 Mb-04 Nakano-fujimichō – 1.9 Mb-05 Nakano-shimbashi 5.7 3.2 M-06 Nakano-sakaue E Ōedo Line 6.8 M-07 Nishi-Shinjuku Keiō Line Odakyu Odawara Line /E Ōedo Line ( Shinjuku- nishiguchi ) JBJY Chūō-Sōbu Line Yamanote Line JCJSJA Chūō Main Line Saikyō, Shōnan Shinjuku lines 7.6 M-08 Shinjuku Seibu Shinjuku of Seibu Shinjuku Line 7.9 M-09 Shinjuku-sanchōme FS 8.6 M-10 Shinjuku-gyoenmae 9.5 M-11 Yotsuya-sanchōme N Namboku Line 10.5 M-12 Yotsuya JC/JB Chūō Main Line, Chūō-Sōbu Line NYZ Namboku, Yūrakuchō, Hanzōmon lines (Nagatachō) 11.8 M-13 Akasaka-mitsuke G Ginza Line N Namboku Line (G&N-06 Tameike-sannō) 12.7 M-14 Kokkai-gijidōmae 13.4 M-15 Kasumigaseki H Hibiya Line C Chiyoda Line Yamanote Line Keihin Tōhoku Line Tōkaidō Line Shinkansen G Ginza Line 14.4 M-16 Ginza H Hibiya Line Y Yūrakuchō Line (Y-18 Yūrakuchō) Keiyō Line Tōkaidō Shinkansen Tōhoku, Jōetsu, Nagano Shinkansen Tōkaidō Main Line Keihin-Tōhoku Line Yamanote Line Chūō Line (Rapid) Sōbu Line (Rapid)–Yokosuka Line 15.5 M-17 Tokyo T Tōzai Line 16.1 M-18 Ōtemachi Z Hanzōmon Line I Mita Line 17.0 M-19 Awajichō S Toei Shinjuku Line (C-07 Ogawamachi) C Chiyoda Line (C-12 Shin-ochanomizu) JC/JB Chūō Line (Rapid) Chūō–Sōbu Line Kanda River 17.8 M-20 Ochanomizu 18.6 M-21 Hongō-Sanchōme E Ōedo Line Kasuga: E/I Ōedo, Mita lines 19.4 M-22 Kōrakuen N Namboku Line Koishikawa Depot 21.2 M-23 Myōgadani 22.4 M-24 Shin-Ōtsuka F Fukutoshin Line Seibu Ikebukuro Line JA/JS/Y Saikyō, Shōnan-Shinjuku lines Yūrakuchō Line 24.2 M-25 Ikebukuro JY Yamanote Line Tōbu Tōjō Line

The Tokyo Metro Marunouchi Line (東京メトロ丸ノ内線, Tōkyō Metoro Marunouchi-sen) is a subway line in Tokyo, Japan, operated by 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 line was named after the Marunouchi business district in Chiyoda, Tokyo, under which it passes. On maps, diagrams and signboards, the line is shown using the color red, and its stations are given numbers using the letters "M" for the main line and "Mb" for the branch line.