Fukutoshin Line

Tokyo Metro Fukutoshin Line
A line up of Fukutoshin Line rolling stock, June 2009
Overview
Other name(s)	No. 13 Fukutoshin Line
Native name	東京地下鉄副都心線
Type	Rapid transit
Locale	Tokyo
Termini	Wakōshi Shibuya
Stations	16
Daily ridership	330,096 (2010)
Operation
Opened	December 7, 1994 (as Yūrakuchō New Line) June 14, 2008 (as Fukutoshin Line)
Owner	Tokyo Metro
Depot(s)	Wakō
Rolling stock	7000 series, 10000 series, etc.
Technical
Line length	20.2 km (12.6 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC overhead catenary
Operating speed	80 km/h (50 mph)
Route map

The Tokyo Metro Fukutoshin Line (東京地下鉄副都心線, Tōkyō Chikatetsu Fukutoshin-sen^?), formally the No. 13 Fukutoshin Line (13号線（副都心線）, Jūsangō-sen （Fukutoshin-sen）^?), is a subway line operated by the Tokyo subway operator Tokyo Metro in west-central Tokyo, Japan. The newest line in the Tokyo subway network, it opened in stages between 1994 and 2008.

The Fukutoshin Line is the deepest metro line in Tokyo, with an average depth of 27 meters. At Shinjuku-sanchōme Station, the line passes under the Marunouchi and above the Shinjuku lines at a depth of 15 meters, with a gap of only 11 centimeters to the Shinjuku Line tunnel. The deepest section is at the immediately adjacent Higashi-Shinjuku Station, where the line goes down to 35 meters, partly due to an underground space reservation for a possible future extension of the Jōetsu Shinkansen to Shinjuku.

It is the second Tokyo Metro line to feature express services, after the Tōzai Line; however, unlike the Tozai Line (where rapid services are only offered on the Tōyōchō – Nishi-Funabashi section), the Fukutoshin Line offers express services throughout the line, a first for Tokyo Metro. Express trains pass local trains at Higashi-Shinjuku, where additional tracks are installed for this purpose. Local trains stop at all stations.