  the  is a part of the extensive rapid transit system that consists of tokyo metro and toei subway in the greater tokyo area of japan. while the subway system itself is largely within the city center, the lines extend far out via extensive through services onto suburban railway lines. ==networks== there are two primary subway operators in tokyo: * tokyo metro â formerly the teito rapid transit authority (trta), it was privatized in 2004. it currently operates 179 stations on nine lines and  of route. * toei subway â run by the tokyo metropolitan bureau of transportation, an agency of the tokyo metropolitan government. it operates 106 stations on four lines. as of 2013, the combined subway network of the tokyo and toei metros comprises 290 stations and 13 lines. the tokyo metro and toei networks together carry a combined average of over eight million passengers daily. despite being ranked first in worldwide subway usage, subways make up a small fraction of heavy rail rapid transit in tokyo aloneâonly 274 out of 882 railway stations, as of 2007. the tokyo subway at 8.7 million daily passengers on
Rail_transport_in_Tokyo Rapid_transit_in_Japan Underground_rapid_transit_in_Japan