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In addition to its extensive railway network, Japan has a large number of subway systems. The largest is the Tokyo subway, where the network in 1989 consisted of 211 kilometers of track serving 205 stations. Two subway systems serve the capital: one run by the Tokyo Metro (named Teito Rapid Transit Authority until 2004), with nine lines (the oldest, Ginza line was built in 1927), and the other operated by the Tokyo metropolitan government's Transportation Bureau (Toei), with four lines. Outlying and suburban areas are served by seven private railway companies, whose lines intersect at major stations with the subway system. More than sixty additional kilometers of subway were under construction in 1990 by the two companies.
Tokyo Metro