東京 メトロ - 東京地下鉄 - 東京都交通局 都営地下鉄 - Tokyo Metro, Tokyo Metropolitan, Toei subway lines system, infrastructure, public rapid transit operator, mass transport, underground rail network, trains, railways, railroads, rolling stock, electric multiple units, wayfinding, signage, station architecture, engineering, planning, liveries, livery design, heritage, advertisements, branding, commuting culture, history, vintage posters, legacy, route maps, visual graphic corporate identity standards