Every Operating Railway System in Greater Tokyo Area

A total of 49 rail transport systems from 47 operators in Tokyo are illustrated on the map. Systems are categorized by operators with exception of the Tokyo Metropolitan Bureau of Transportation which operates Toei Subway, Tokyo Toden, and Nippori-Toneri Liner.

The Greater Tokyo Area (Capital Area) is defined as Tokyo, Kanagawa, Chiba, Saitama, Ibaraki, Tochigi, and Gunma prefectures.

If a line extends beyond the Greater Tokyo Area, only the section inside the GTA is counted (e.g Gotemba line, Koumi line, Chuo line, Joban line, etc.)

rapid transit vs. commuter rail vs. heavy rail
The distinction of these services is often unclear as they are used inconsistently by different sources. Sometimes, rapid transit and commuter rail are subcategories of heavy rail, sometimes they are used interchangeably, and sometimes they are used as different definitions.
For the purpose of this video, these terms are defined as follows:
Rapid transit: operates in urban center, shorter distances between stations, frequent service, mostly underground (usually referred as metro or subway)
Commuter rail: connects suburban areas with the city center, often connects with rapid transit and provide through-services
Heavy rail: operates mostly in suburban areas as regional lines, less frequent service, often shorter or single fleet

Categories
based on:
https://en.wikipedia.org/wiki/List_of_urban_rail_systems_in_Japan#Categories

Lines, stations, and length counting methodology
If two lines have different terminals and are named as a "branch line", they are considered as one line (e.g. Narita Main line, Narita Abiko branch line, Narita Airport line are counted as 1 line). If two lines share a majority of routes with different terminals but have "unique names", they are counted as separate lines (e.g. Keikyu lines).
The station counts and track lengths are the numbers of unique stations and unique segments for each operator. However, for the "Greater Tokyo Area rail network", station counts and track lengths of operators are simply summed together resulting in some cross-company stations and tracks being counted multiple times.
Map data ©2021 Google

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Видео Every Operating Railway System in Greater Tokyo Area канала Metro Liner