"都営三田線の新型車両6500形、車内もシンプルな造形に - 写真68枚" [New, simplistic 6500 series of the Toei Mita Line]. Mynavi News (in Japanese). 2022-02-17. Retrieved 2022-03-25.
Kinoshita, Kenji (2021-09-02). "相鉄21000系「東急線内は目黒線直通用」9月デビュー! グッズも発売" [Sotetsu 21000 series to debut in September!]. Mynavi News (in Japanese). Retrieved 2022-03-25.
railf.jp
"相模鉄道,3月18日にダイヤ改正を実施" [Sagami Railway implements timetable revision on March 18]. Japan Railfan Magazine Online (in Japanese). Archived from the original on 17 December 2022. Retrieved 17 December 2022.
"東京都交通局6500形が営業運転を開始" [Tokyo Metropolitan Bureau of Transportation 6500 series begins commercial operation]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 15 May 2022. Retrieved 2022-05-25.
"相模鉄道,3月18日にダイヤ改正を実施" [Sagami Railway implements timetable revision on March 18]. Japan Railfan Magazine Online (in Japanese). Archived from the original on 17 December 2022. Retrieved 17 December 2022.