東急目黒線・東京メトロ南北線・埼玉高速鉄道線で8両編成の運転開始 [8-car trains begin operating on the Tokyu Meguro Line, Tokyo Metro Namboku Line, and Saitama Rapid Railway Line]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 9 April 2022. Retrieved 27 May 2022.
"「営団地下鉄」から「東京メトロ」へ" [From "Teito Rapid Transit Authority" to "Tokyo Metro"]. Tokyo Metro Online. 8 July 2006. Archived from the original on 16 May 2012. Retrieved 29 May 2022.
"~神奈川県央地域及び横浜市西部から東京・埼玉に至る広域的な鉄道ネットワークの形成~" [-Formation of a wide-area railway network from central Kanagawa Prefecture and western Yokohama to Tokyo and Saitama-] (PDF). tokyometro.jp. 27 January 2022. Archived from the original(PDF) on 27 January 2022. Retrieved 22 March 2023.
"有楽町線延伸(豊洲・住吉間)及び南北線延伸(品川・白金高輪間)の鉄道事業許可を申請しました。" [Yurakucho Line extension (between Toyosu and Sumiyoshi) and Namboku Line extension (between Shinagawa and Shirokane Takanawa) application for a Business Permit] (PDF). Tokyo Metro (in Japanese). 28 January 2022. Retrieved 28 January 2022.
"「営団地下鉄」から「東京メトロ」へ" [From "Teito Rapid Transit Authority" to "Tokyo Metro"]. Tokyo Metro Online. 8 July 2006. Archived from the original on 16 May 2012. Retrieved 29 May 2022.
"~神奈川県央地域及び横浜市西部から東京・埼玉に至る広域的な鉄道ネットワークの形成~" [-Formation of a wide-area railway network from central Kanagawa Prefecture and western Yokohama to Tokyo and Saitama-] (PDF). tokyometro.jp. 27 January 2022. Archived from the original(PDF) on 27 January 2022. Retrieved 22 March 2023.