"「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.
tokyu.co.jp
"PASMOは 3月18日(日)サービスを開始します" [PASMO – The service will start on Sunday, March 18th.] (PDF) (in Japanese). 21 December 2006. Archived(PDF) from the original on 1 May 2020. Retrieved 5 March 2022.
web.archive.org
"「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.
"PASMOは 3月18日(日)サービスを開始します" [PASMO – The service will start on Sunday, March 18th.] (PDF) (in Japanese). 21 December 2006. Archived(PDF) from the original on 1 May 2020. Retrieved 5 March 2022.