is the metro

Rapid transit

A rapid transit, underground, subway, elevated railway, metro or metropolitan railway system is an electric passenger railway in an urban area with a high capacity and frequency, and grade separation from other traffic. Rapid transit systems are typically located either in underground tunnels or on...

 network in the city of Yokohama

Yokohama

is the capital city of Kanagawa Prefecture and the second largest city in Japan by population after Tokyo and most populous municipality of Japan. It lies on Tokyo Bay, south of Tokyo, in the Kantō region of the main island of Honshu...

, Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, south of Tokyo In Kanagawa pref. It is operated by Yokohama City Transportation Bureau

Yokohama City Transportation Bureau

The is the administrative agency in charge of public transportation services in the city of Yokohama, Japan.-Subway operations:The Yokohama Municipal Subway consists of the following lines:...

, and is operated as two lines, though 3 continuous lines exist.

Lines

Color & Icon		Name		Mark	First section opened	Last ex- tension	Length km/miles	Stations
blue		Line 1	Blue Line Blue Line (Yokohama) The is a line in the Yokohama Municipal Subway system of Yokohama, Japan, operated by Yokohama City Transportation Bureau. Line 3 runs from Azamino to Kannai, and Line 1 runs from Kannai to Shōnandai. All the trains join these two lines.-History:...	B	1972	1999	19.7/12.2	17
		Line 3			1985	1993	20.7/12.9	22
green		Line 4	Green Line Green Line (Yokohama) The is a line of the Yokohama Municipal Subway in the city of Yokohama, Kanagawa Prefecture, Japan. Its formal designation is Line 4, and it is the first part of a proposed...	G	2008	-	13.0/8.0	10

Line 1 and 3 are operated as a single line. Transfer to other railway systems is possible with JR Shinkansen

Shinkansen

The , also known as THE BULLET TRAIN, is a network of high-speed railway lines in Japan operated by four Japan Railways Group companies. Starting with the Tōkaidō Shinkansen in 1964, the network has expanded to currently consist of of lines with maximum speeds of , of Mini-shinkansen with a...

 and Yokohama Line at Shin-Yokohama Station

Shin-Yokohama Station

is a train station in Yokohama, Japan. It is serves the Tōkaidō Shinkansen, Yokohama Line, and Yokohama Municipal Subway Line 3.-History:Shin-Yokohama Station was opened on October 1, 1964 as part of the opening of the Tōkaidō Shinkansen...

 and Keikyu Line, JR Tokaido Lines, and other lines at Yokohama Station

Yokohama Station

is a main interchange station located in Nishi-ku, Yokohama, Japan. It is the busiest station in Kanagawa Prefecture and the 5th busiest in Japan as of 2004, serving 2.05 million passengers daily.-Lines:Yokohama Station is served by the following lines:...

.

• Blue Line
  Blue Line (Yokohama)
  The is a line in the Yokohama Municipal Subway system of Yokohama, Japan, operated by Yokohama City Transportation Bureau. Line 3 runs from Azamino to Kannai, and Line 1 runs from Kannai to Shōnandai. All the trains join these two lines.-History:...
  
   (Lines 1/3) runs from Shonandai Station to Azamino Station
  Azamino Station
  is an interchange railway station operated by Tokyu Corporation's Tōkyū Den-en-toshi Line and a terminal station on Yokohama City Transportation Bureau's Blue Line in Aoba-ku, Yokohama, Kanagawa Prefecture, Japan...
  
  .
• Green Line
  Green Line (Yokohama)
  The is a line of the Yokohama Municipal Subway in the city of Yokohama, Kanagawa Prefecture, Japan. Its formal designation is Line 4, and it is the first part of a proposed...
  
   (Line 4) runs from Nakayama Station
  Nakayama Station (Kanagawa)
  is an interchange railway station located in Midori Ward, Yokohama, Kanagawa Prefecture, Japan. It is served by the East Japan Railway Company's Yokohama Line, and is 13.5 kilometers from the terminus of the Yokohama Line at Higashi-Kanagawa Station, and is also the terminus of the Yokohama...
  
   to Hiyoshi Station
  Hiyoshi Station (Kanagawa)
  is an interchange railway station on the Tokyu Corporation's Tōyoko Line and Meguro Line, as well as the Yokohama Municipal Subway's Green Line. It is located in located in Kōhoku Ward, Yokohama, Kanagawa Prefecture, Japan...
  
  .

Transfer between the Blue and Green Line is possible at Center Kita and Center Minami.

Feeder bus services from western Kawasaki

Kawasaki, Kanagawa

is a city located in Kanagawa Prefecture, Japan, between Tokyo and Yokohama. It is the 9th most populated city in Japan and one of the main cities forming the Greater Tokyo Area and Keihin Industrial Area....

 City area run to Azamino Station.

Future

Future plans for the blue line exist for 2015 for connection with Odakyu Odawara Line and with the future Kawasaki City Subway at Shin-Yurigaoka Station

Shin-Yurigaoka Station

is a junction railway station operated by the Odakyu Electric Railway, located in Asao-ku, Kawasaki, Kanagawa Prefecture, Japan. Served by the Odawara Line and the Tama Line, it is 21.5 kilometers from the terminus of the Odawara Line at Shinjuku Station and is a terminus for the Tama Line...

, Kawasaki

Kawasaki, Kanagawa

is a city located in Kanagawa Prefecture, Japan, between Tokyo and Yokohama. It is the 9th most populated city in Japan and one of the main cities forming the Greater Tokyo Area and Keihin Industrial Area....

 City.

The original plans for the green line was a Yokohama loop line. The Green Line is a stage in the planned line to from Tsurumi Station

Tsurumi Station

is a railway station operated by JR East located in Tsurumi-ku, Yokohama, Kanagawa Prefecture, Japan. It is an interchange between the Keihin-Tōhoku Line and the Tsurumi Line , and is 52.0 kilometers from the terminus of the Keihin-Tōhoku Line at Ōmiya Station...

 to Hiyoshi Station, the current green line to Nakayama Station

Nakayama Station (Kanagawa)

is an interchange railway station located in Midori Ward, Yokohama, Kanagawa Prefecture, Japan. It is served by the East Japan Railway Company's Yokohama Line, and is 13.5 kilometers from the terminus of the Yokohama Line at Higashi-Kanagawa Station, and is also the terminus of the Yokohama...

, to Futamatagawa Station

Futamatagawa Station

is a joint use railway station located in Asahi Ward, Yokohama, Kanagawa Prefecture, Japan. The station serves both the Main Line and the Izumino Line of the Sagami Railway. It is 10.5 kilometers from the terminus of the Main Line at Yokohama Station, and is the terminus for the Izumino Line.-...

, and on to Higashi-Totsuka Station

Higashi-Totsuka Station

is a railway station on the East Japan Railway Company's Yokosuka Line and Shōnan-Shinjuku Line located in Totsuka Ward, Yokohama, Kanagawa Prefecture, Japan. It is 36.7 kilometers from the terminus of the Yokosuka Line at Tokyo Station...

, and to Kami-Ōoka Station

Kami-Ooka Station

is an interchange station located in Kōnan-ku, Yokohama, Kanagawa, Japan. It is served by the Keihin Electric Express Railway ’s Keikyū Main Line and the Yokohama Municipal Subway’s Blue Line...

, Negishi Station, and Motomachi

Motomachi

is a district of Naka Ward in Yokohama, Japan, located immediately west of Yamate and east of Chinatown. It consists mainly of the Motomachi Shopping Street, a five-block long stretch of boutiques and shops, well known in Japan for its cosmopolitan atmosphere, original fashion, and Western...

.

The "missing" Line 2 was planned to run from Kanagawa-Shinmachi Station

Kanagawa-Shinmachi Station

is a railway station on the Keikyū Main Line located in Kanagawa-ku, Yokohama, Kanagawa Prefecture, Japan. It is located 20.0 rail kilometers from the northern terminus of the Keikyū Main Line at Shinagawa Station, in Tokyo.-History:...

 via Yokohama Station

Yokohama Station

is a main interchange station located in Nishi-ku, Yokohama, Japan. It is the busiest station in Kanagawa Prefecture and the 5th busiest in Japan as of 2004, serving 2.05 million passengers daily.-Lines:Yokohama Station is served by the following lines:...

 to Byobugaura Station

Byobugaura Station

is a railway station operated by the Keikyū Keikyū Main Line located in Isogo-ku, Yokohama, Kanagawa Prefecture, Japan. It is located 33.0 rail kilometers from the northern terminus of the Keikyū Main Line at Shinagawa Station, in Tokyo.-History:...

. , there is no schedule for building this line.

External links

• Transportation Bureau, City of Yokohama (Official Website)
• Network map