Most stations are located within the 23 special wards and fall inside the Yamanote Line loop—some wards such as Setagaya and Ōta have no stations (or only a limited number of stations), as rail service in these areas has historically been provided by the Toei Subway or any of the various.
In general, the reported daily ridership is the total of faregate entries and exits at each station, and excludes in-system transfers.
For stations directly shared with other railways, the daily ridership only considers people using Tokyo Metro trains (or through-servicing trains owned by other railways operating as Tokyo Metro trains).
For interface stations, the daily ridership also includes cross-company passengers on through-servicing trains (as part of trackage rights agreements) or transferring from other railways' trains without passing through faregates.
Opening dates are given in standard Japanese date format (YYYY.MM.DD), and arranged from oldest to newest for stations served by multiple lines.