Tokyo Metro Namboku Line

The Tokyo Metro Namboku Line (東京メトロ南北線, Tōkyō Metoro Nanboku-sen; South-North Line) is a subway line owned and operated by Tokyo Metro in Tokyo, Japan. The line runs between Meguro in Shinagawa and Akabane-Iwabuchi in Kita. The Namboku Line was referred to as Line 7 during the planning stages, thus the seldom-used official name is Line 7 Namboku Line (7号線南北線, Nana-gō-sen Nanboku-sen).

Tokyo Metro Namboku Line
A Namboku Line 9000 series train
Overview
Other name(s)	N
Native name	東京メトロ南北線
Owner	Tokyo Metro
Line number	7
Locale	Tokyo
Termini	Meguro Akabane-Iwabuchi
Stations	19
Color on map	Teal (#00AC9B)
Service
System	Tokyo subway
Operator(s)	Tokyo Metro
Depot(s)	Ōji
Rolling stock	Tokyo Metro 9000 series Saitama Rapid Railway 2000 series Tokyu 3000 series Tokyu 5080 series Tokyu 3020 series Sotetsu 21000 series
Daily ridership	522,736 (2017)[1]
History
Opened	29 November 1991; 33 years ago (1991-11-29)
Technical
Line length	21.3 km (13.2 mi)
Number of tracks	Double-track
Track gauge	1,067 mm (3 ft 6 in)
Minimum radius	160.351 m (526.09 ft)
Electrification	1,500 V DC (overhead catenary)
Operating speed	80 km/h (50 mph)
Train protection system	New CS-ATC, ATO
Maximum incline	3.5%
Route map Legend MG Through-running onto Tōkyū Meguro Line N01 Meguro JY Yamanote Line Yamanote Line N02 Shirokanedai N03 Shirokane-takanawa I Mita Line Mita Line N04 Azabu-juban E Ōedo Line N05 Roppongi-itchōme N06 Tameike-Sannō G Ginza Line Kokkai-gijidōmae CM Chiyoda and Marunouchi lines Yūrakuchō Line Akasaka-mitsuke MG Marunouchi and Ginza lines N07 Nagatachō YZ Yūrakuchō and Hanzōmon lines Chūō Main Line N08 Yotsuya MJCJB Marunouchi, Chūō (Rapid) and Chūō–Sōbu lines Marunouchi Line Shinjuku Line N09 Ichigaya YSJB Yūrakuchō, Shinjuku and Chūō–Sōbu lines Shinjuku Line Ōedo Line N10 Iidabashi YTEJB Yūrakuchō, Tōzai, Ōedo and Chūō–Sōbu lines Tozai Line Mita Line │ Yūrakuchō Line N11 Korakuen M Marunouchi Line Kasuga EI Ōedo and Mita lines Mita Line N12 Todaimae N13 Hon-komagome N14 Komagome JY Yamanote Line N15 Nishigahara N16 Ōji JK Keihin–Tōhoku and Toden Arakawa lines N17 Ōji-kamiya N18 Shimo N19 Akabane-iwabuchi SR Through-running onto Saitama Railway Line

On maps, diagrams and signboards, the line is shown using the color emerald (previously coded "teal"), and its stations are given numbers using the letter "N".

Overview

Trains run through onto the Tokyu Meguro Line for Hiyoshi and the Saitama Railway's Saitama Rapid Railway Line (which is essentially a separately-owned extension of the Namboku Line) for Urawa-Misono.

The right-of-way and stations between Shirokane-Takanawa and Meguro are shared with the Toei Mita Line – a unique situation on the Tokyo subway where both operators share common infrastructure. Under an agreement between Tokyo Metro and the Tokyo Metropolitan Government, the fare for this section is calculated on the Toei Subway fare system for passengers traveling to stations on the Mita Line past Shirokane-Takanawa, on the Metro fare system for passengers traveling to stations on the Namboku Line past Shirokane-Takanawa, and on the system "most beneficial to the passenger" (presently the Metro schedule) for travel solely on the shared sector.

On maps, diagrams and signboards, the Namboku Line is shown using the color emerald (▉), and its stations are given numbers using the letter "N".

Station list

• All stations are located in Tokyo.
• All services stop at all stations.

Station No.	Station	Japanese	Distance (km)		Transfers	Location
			Between stations	From N-01
↑ Through-running to/from ↑ MG Meguro Line for Hiyoshi SH Tōkyū Shin-Yokohama Line for Shin-Yokohama Sōtetsu Main Line for Ebina Sōtetsu Izumino Line for Shōnandai (via Futamata-gawa on the Sōtetsu Main Line)
N01	Meguro	目黒[* 1]	–	0.0	MG Meguro Line I Mita Line (I-01) (shared) JY Yamanote Line	Shinagawa
N02	Shirokanedai	白金台[* 2]	1.3	1.3	I Mita Line (I-02) (shared)	Minato
N03	Shirokane-takanawa	白金高輪[* 2]	1.0	2.3	I Mita Line (I-03) (shared)
N04	Azabu-juban	麻布十番	1.3	3.6	E Ōedo Line (E-22)
N05	Roppongi-itchome	六本木一丁目	1.2	4.8	H Hibiya Line (Roppongi: H-04)
N06	Tameike-sanno	溜池山王	0.9	5.7	G Ginza Line (G-06) M Marunouchi Line (Kokkai-gijidomae: M-14) C Chiyoda Line (Kokkai-gijidomae: C-07)	Chiyoda
N07	Nagatacho	永田町	0.9	6.6	Y Yūrakuchō Line (Y-16) Z Hanzōmon Line (Z-04) G Ginza Line at Akasaka-mitsuke (G-05) M Marunouchi Line at Akasaka-mitsuke (M-13)
N08	Yotsuya	四ツ谷	1.3	7.9	M Marunouchi Line (M-12) JC Chūō Line (Rapid) JB Chūō-Sōbu Line	Shinjuku
N09	Ichigaya	市ケ谷	1.0	8.9	Y Yūrakuchō Line (Y-14) S Shinjuku Line (S-04) JB Chūō-Sōbu Line
N10	Iidabashi	飯田橋	1.1	10.0	T Tozai Line (T-06) Y Yūrakuchō Line (Y-13) E Ōedo Line (E-06) JB Chūō-Sōbu Line
N11	Korakuen	後楽園	1.4	11.4	M Marunouchi Line (M-22) I Mita Line (Kasuga: I-12) E Ōedo Line (Kasuga: E-07)	Bunkyō
N12	Todaimae	東大前	1.3	12.7
N13	Hon-komagome	本駒込	0.9	13.6
N14	Komagome	駒込	1.4	15.0	JY Yamanote Line	Toshima
N15	Nishigahara	西ケ原	1.4	16.4		Kita
N16	Oji	王子	1.0	17.4	JK Keihin-Tōhoku Line Toden Arakawa Line (Oji-ekimae)
N17	Oji-kamiya	王子神谷	1.2	18.6
N18	Shimo	志茂	1.6	20.2
N19 SR19	Akabane-iwabuchi	赤羽岩淵[* 3]	1.1	21.3	SR Saitama Railway Line
↓Through-running to/from↓ SR Saitama Rapid Railway Line for Urawa-Misono

Rolling stock

• Tokyo Metro 9000 series 6/8-car EMUs
• Tokyu 3000 series 8-car EMUs
• Tokyu 5080 series 8-car EMUs
• Tokyu 3020 series 8-car^[2] EMUs
• Saitama Rapid Railway 2000 series 6-car EMUs
• Sotetsu 21000 series 8-car EMUs

• 
  Tokyo Metro 9000 series
• 
  Saitama Rapid Railway 2000 series
• 
  Tokyu 3000 series
• 
  Tokyu 5080 series
• 
  Tokyu 3020 series
• 
  Sotetsu 21000 series

History

The 21.3 km (13.2 mi) Namboku Line is one of Tokyo Metro's newer lines, featuring advanced technology including full automatic train operation and platform screen doors. Although the line was originally proposed in 1968, construction did not begin until the 1980s, partly due to the right-of-way to Meguro with the Toei Mita Line. The first segment from Komagome to Akabane-Iwabuchi opened on 29 November 1991.

The line initially operated with four-car EMUs. Upon its extension to Yotsuya in March 1996, the formations were extended to six cars. On 1 April 2022, eight-car trains began operating on the line.^[2]

The extension to Tameike-Sannō was completed in September 1997, and the last stretch from Tameike-Sanno to Meguro was completed on 26 September 2000, when through service to the Tokyu Meguro Line started.^[3] Through service with the Saitama Rapid Railway Line commenced when it opened in March 2001 and accommodated traffic to and from Saitama Stadium during the 2002 World Cup. Although the Saitama Line is more or less a northern extension of the Namboku Line, it nevertheless remains a private entity to which the Namboku Line offers through services with.

The Namboku Line was inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.^[4]

Effective the timetable revision on 18 March 2023, through services onto the Sagami Railway commenced courtesy of the Tokyu and Sotetsu Shin-Yokohama Line.^[5] Most southbound services past Hiyoshi continue as far south as Shin-Yokohama and Ebina.

Future plans

On 28 January 2022, Tokyo Metro announced that a 2.5 km (1.6 mi) spur line from Shirokane-takanawa to Shinagawa would be built.^[6] The extension is expected to cost ¥131 billion (2021) (US$1.19 billion) and scheduled to begin revenue service in the mid-2030s. It is intended to increase connections to and from the Chūō Shinkansen, which is scheduled to open for service in 2027.