| Tokyo Metro Namboku Line | |
| Other Name: | N |
| Linenumber: | 7 |
| Native Name: | 東京メトロ南北線 |
| Native Name Lang: | ja |
| Mapcolor: | Teal (#) |
| System: | Tokyo subway |
| Locale: | Tokyo |
| Stations: | 19 |
| Daily Ridership: | 522,736 (2017)[1] |
| Operator: | Tokyo Metro |
| Depot: | Ōji |
| Tracks: | Double-track |
| Electrification: | (overhead catenary) |
| Maxincline: | 3.5% |
| Trainprotection: | New CS-ATC, ATO |
| Map State: | collapsed |
The 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 .
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".
Trains run through onto the Tokyu Meguro Line for and the Saitama Railway's Saitama Rapid Railway Line (which is essentially a separately-owned extension of the Namboku Line) for .
The right-of-way and stations between 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 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 No. | Station | Japanese | Distance (km) | Transfers | Location | ||
|---|---|---|---|---|---|---|---|
| Between stations | From N-01 | ||||||
| ↑ Through-running to/from ↑ for for Sōtetsu Izumino Line for (via on the Sōtetsu Main Line) | |||||||
| 目黒[2] | – | 0.0 | Shinagawa | ||||
| 白金台[3] | 1.3 | 1.3 | Mita Line (I-02) (shared) | Minato | |||
| 白金高輪 | 1.0 | 2.3 | Mita Line (I-03) (shared) | ||||
| 麻布十番 | 1.3 | 3.6 | (E-22) | ||||
| 六本木一丁目 | 1.2 | 4.8 | |||||
| 溜池山王 | 0.9 | 5.7 | Chiyoda | ||||
| 永田町 | 0.9 | 6.6 | |||||
| 四ツ谷 | 1.3 | 7.9 | Shinjuku | ||||
| 市ケ谷 | 1.0 | 8.9 | |||||
| 飯田橋 | 1.1 | 10.0 | |||||
| 後楽園 | 1.4 | 11.4 | Bunkyō | ||||
| 東大前 | 1.3 | 12.7 | |||||
| 本駒込 | 0.9 | 13.6 | |||||
| 駒込 | 1.4 | 15.0 | Yamanote Line | Toshima | |||
| 西ケ原 | 1.4 | 16.4 | Kita | ||||
| 王子 | 1.0 | 17.4 | |||||
| 王子神谷 | 1.2 | 18.6 | |||||
| 志茂 | 1.6 | 20.2 | |||||
| 赤羽岩淵[4] | 1.1 | 21.3 | |||||
| ↓Through-running to/from↓ Saitama Rapid Railway Line for | |||||||
The 21.3km (13.2miles) 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 to 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.
The extension to 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.[6] 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.[7]
Effective the timetable revision on 18 March 2023, through services onto the Sagami Railway commenced courtesy of the Tokyu and Sotetsu Shin-Yokohama Line.[8] Most southbound services past Hiyoshi continue as far south as Shin-Yokohama and Ebina.
On 28 January 2022, Tokyo Metro announced that a 2.5km (01.6miles) spur line from Shirokane-takanawa to Shinagawa would be built.[9] The extension is expected to cost 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.