List of urban rail systems in Japan

List of urban rail systems in Japan lists urban rail transit systems in Japan, organized by metropolitan area (都市圏^?), including number of stations, length (km), and average daily and annual ridership volume. Data is shown only for those areas designated as major metropolitan areas (^?) by the Statistics Bureau of the Ministry of Internal Affairs and Communications.

There are several considerations for the data presented in this list.

Data is broken down at the line level, then rolled up for each specific railway operator. The total station count for each operator is a “unique station” count—an interchange or transfer station between two lines operated by the same company is counted as a single station. As a result, summing together the station counts for all of the lines under a single railway operator will generally yield a value greater than the total station count cited for the operator.

Some station pairs are officially considered interchanges by their respective railway operators despite having different names (e.g., Tameike-Sannō and Kokkai-gijidō-mae on the Tokyo Metro and Tenjin and Tenjin-Minami on the Fukuoka City Subway). As the names are different, however, they are counted as separate stations in this list.

In a similar fashion to the station count, length is counted as route kilometers, but only considers “unique” segments. The following considerations are relevant for the lengths referenced in the tables.

...
Wikipedia