Tokyo Metro Marunouchi Line

Route diagram
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Tokyo Metro Marunouchi Line
	300px A Tokyo Metro 02 series EMU
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
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)
Route map
	240px

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^?).

Overview

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.

The Marunouchi Line is served by Tokyo Metro 02 series rolling stock in six-car trains on the main line, and three-car trains on the Hōnanchō branch. The main line is the most frequent subway line in Tokyo, with trains running at intervals of 1 minute 50 seconds during peak hours. In spite of such high-frequency service, according to a 2008 survey by the Ministry of Land, Infrastructure, Transport and Tourism the Marunouchi Line is one of the most crowded railway lines in Tokyo, running at 157% capacity between Shin-ōtsuka and Myōgadani stations.^[2] Its age and relatively short train length has made it one of the most crowded lines in Tokyo, although the 2000 opening of the Toei Ōedo Line has relieved the problem somewhat. In response to crowding, Tokyo Metro upgraded all stations with chest-high platform doors on March 28, 2009, a date on which it also began driver-only operation . The Hōnanchō branch switched to driver-only operation in July 2004.^[3]

Due to the age of the Marunouchi Line and the relative shallowness at which it runs, at several points in central Tokyo trains run at or above ground level. These include Yotsuya Station, the Kanda River near Ochanomizu Station (see image), and between Kōrakuen and Myōgadani stations.

On maps, diagrams and signboards, the line is shown using the color red (▉). Its stations are given numbers using the prefix "M"; Hōnanchō branch line stations carry a lowercase "m".

Station list

All stations are located in Tokyo.

Main Line

No.	Station	Japanese	Distance (km)		Transfers	Location
No.	Station	Japanese	Between stations	From M-01	Transfers	Location
M-01	Ogikubo	荻窪	-	0.0	Chūō Line (Rapid), Chūō-Sōbu Line	Suginami
M-02	Minami-Asagaya	南阿佐ケ谷	1.5	1.5
M-03	Shin-Kōenji	新高円寺	1.2	2.7
M-04	Higashi-Kōenji	東高円寺	0.9	3.6
M-05	Shin-Nakano	新中野	1.0	4.6		Nakano
M-06	Nakano-Sakaue	中野坂上	1.1	5.7	Marunouchi Line (for Hōnanchō; some trains through to Nakano-Fujimichō) Toei Ōedo Line (E-30)	Nakano
M-07	Nishi-Shinjuku	西新宿	1.1	6.8		Shinjuku
M-08	Shinjuku	新宿	0.8	7.6	Toei Shinjuku Line (S-01), Toei Ōedo Line (E-27, Shinjuku-Nishiguchi: E-01) Chūō Line (Rapid), Chūō-Sōbu Line, Yamanote Line, Shōnan-Shinjuku Line, Saikyō Line Keiō Line, Keiō New Line Odakyū Odawara Line Seibu Shinjuku Line (Seibu-Shinjuku)
M-09	Shinjuku-Sanchōme	新宿三丁目	0.3	7.9	Tokyo Metro Fukutoshin Line (F-13) Toei Shinjuku Line (S-02)
M-10	Shinjuku-Gyoemmae	新宿御苑前	0.7	8.6
M-11	Yotsuya-Sanchōme	四谷三丁目	0.9	9.5
M-12	Yotsuya	四ツ谷	1.0	10.5	Tokyo Metro Namboku Line (N-08) Chūō Line (Rapid), Chūō-Sōbu Line
M-13	Akasaka-Mitsuke	赤坂見附	1.3	11.8	Tokyo Metro Ginza Line (G-05), Tokyo Metro Yūrakuchō Line (Nagatachō: Y-16), Tokyo Metro Hanzōmon Line (Nagatachō: Z-04), Tokyo Metro Namboku Line (Nagatachō: N-07)	Minato
M-14	Kokkai-Gijidō-mae	国会議事堂前	0.9	12.7	Tokyo Metro Chiyoda Line (C-07), Tokyo Metro Ginza Line (Tameike-Sannō: G-06), Tokyo Metro Namboku Line (Tameike-Sannō: N-06)	Chiyoda
M-15	Kasumigaseki	霞ケ関	0.7	13.4	Tokyo Metro Hibiya Line (H-06), Tokyo Metro Chiyoda Line (C-08)	Chiyoda
M-16	Ginza	銀座	1.0	14.4	Tokyo Metro Ginza Line (G-09), Tokyo Metro Hibiya Line (H-08) Underground passage to Higashi-Ginza, Hibiya, Yūrakuchō stations	Chūō
M-17	Tokyo	東京	1.1	15.5	Tohoku Shinkansen, Akita Shinkansen, Yamagata Shinkansen, Joetsu Shinkansen, Nagano Shinkansen, Yamanote Line, Chūō Main Line, Tokaido Main Line, Sōbu Main Line, Yokosuka Line, Keiyō Line, Keihin-Tōhoku Line, Musashino line Tokaido Shinkansen	Chiyoda
M-18	Ōtemachi	大手町	0.6	16.1	Tokyo Metro Tōzai Line (T-09), Tokyo Metro Chiyoda Line (C-11), Tokyo Metro Hanzōmon Line (Z-08) Toei Mita Line (I-09)
M-19	Awajichō	淡路町	0.9	17.0	Tokyo Metro Chiyoda Line (Shin-Ochanomizu: C-12) Toei Shinjuku Line (Ogawamachi: S-07)
M-20	Ochanomizu	御茶ノ水	0.8	17.8	Chūō Line (Rapid), Chūō-Sōbu Line	Bunkyō
M-21	Hongō-Sanchōme	本郷三丁目	0.8	18.6	Toei Ōedo Line (E-08)
M-22	Kōrakuen	後楽園	0.8	19.4	Tokyo Metro Namboku Line (N-11) Toei Mita Line (Kasuga: I-12), Toei Ōedo Line (Kasuga: E-07)
M-23	Myōgadani	茗荷谷	1.8	21.2
M-24	Shin-Ōtsuka	新大塚	1.2	22.4
M-25	Ikebukuro	池袋	1.8	24.2	Tokyo Metro Yūrakuchō Line (Y-09), Tokyo Metro Fukutoshin Line (F-09) Yamanote Line, Saikyō Line, Shōnan-Shinjuku Line Seibu Ikebukuro Line Tōbu Tōjō Line	Toshima

Branch Line

No.	Station	Japanese	Distance (km)		Transfers	Location
No.	Station	Japanese	Between stations	Total	Transfers	Location
m-03	Hōnanchō	方南町	-	0.0		Suginami
m-04	Nakano-Fujimichō	中野富士見町	1.3	1.3		Nakano
m-05	Nakano-Shimbashi	中野新橋	0.6	1.9
M-06	Nakano-Sakaue	中野坂上	1.3	3.2	Tokyo Metro Marunouchi Line (for Ikebukuro and Ogikubo; some trains through) Toei Ōedo Line (E-30)

Rolling stock

File:Tokyometro02-102.JPG

An 02 series EMU at Yotsuya Station, June 2007

Tokyo Metro 02 series (since 1988)

All trains are based at Koishikawa and Nakano Depots.

Former

TRTA 300/400/500/900 series (from 1954 until 1996, later sold and exported for use on Line B of the Buenos Aires Metro)
TRTA 100 series (from 1962 until 1968, transferred from Ginza Line, used for Hōnanchō branch only)
TRTA 2000 series (from 1968 until 1981, used for Hōnanchō branch only)

TRTA Marunouchi Line 2000 Nakano-sakaue 19770625.jpg

A Hōnanchō branch 2000 series train in 1977

History

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File:Marunouchi line-opening1954.jpg

Opening ceremony at Ikebukuro in 1954

The Marunouchi Line is the second subway line to be built in the city, and the first to be constructed after the Second World War. Its design is similar to that of the Ginza Line, the oldest subway line in Tokyo. Both lines are standard gauge and use third-rail power, unlike the other Tokyo subway lines.

The first section was opened between Ikebukuro and Ochanomizu on 20 January 1954. The subsequent progress of the line was as follows:

Ochanomizu to Awajichō: March 1956
Awajichō to Tokyo: July 1956
Tokyo to Nishi-Ginza (now Ginza): December 1957
Nishi-Ginza to Kasumigaseki: October 1958
Kasumigaseki to Shinjuku: March 1959
Shinjuku to Shin-Nakano/Nakano-Fujumichō (not Nishi-Shinjuku): February 1961
Shin-Nakano to Minami-Asagaya (not Higashi-Kōenji): November 1961
Minami-Asagaya to Ogikubo: January 23, 1962
Nakano-Fujimichō to Hōnanchō: March 23, 1962
Nishi-Ginza becomes part of Ginza when Hibiya Line reaches there: August 1964
Higashi-Kōenji opens (between Shin-Nakano and Shin-Kōenji): September 1964
Nishi-Shinjuku opens (between Shinjuku and Nakano-Sakaue) May 1996.

The Marunouchi Line was one of the lines targeted in the Aum sarin gas attack on 20 March 1995.

Future plans

The platform-edge doors at Hōnanchō Station, the terminus of the Hōnanchō Branch are due to be lengthened to allow 6-car trains to use the station, with work starting in 2013. Once completed, this will enable through trains to and from Ikebukuro to start operating all the way to Hōnanchō from fiscal 2017.^[4]