山手線用E231系4ドア車配給輸送 [Yamanote Line E231 series 4-door cars delivered] (in Japanese). 1 February 2010. Archived from the original on 4 October 2012. Retrieved 1 February 2010.
jreast.co.jp
「みどりの山手線ラッピングトレイン」を運行します ["Green Yamanote Line Train" to operate] (PDF). News release (in Japanese). Japan: East Japan Railway Company. 19 December 2012. Retrieved 19 December 2012.
JR東日本E231系800番台 [JR East E231-800 series]. Japan Railfan Magazine (in Japanese). Vol. 43, no. 505. Japan: Koyusha Co., Ltd. May 2003. pp. 58–65. Retrieved 22 May 2022. (subscription required)
railf.jp
E231系500番台が中央・総武緩行線仕様となって出場 [E231-500 series outshopped in Chūō–Sōbu Line style]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 29 October 2014. Retrieved 30 November 2014.
中央総武緩行線でE231系500番台が営業運転を開始 [E231-500 series enters revenue service on Chūō–Sōbu Line]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 2 December 2014. Retrieved 2 December 2014.
E231系トウ540編成が三鷹車両センターに転属 [E231 series set 540 transferred to Mitaka Depot]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 20 May 2016. Archived from the original on 11 June 2016. Retrieved 11 June 2016.
"E231系トウ514編成に東京駅開業100周年記念のラッピング" [E231 series set 514 in Tokyo Station 100th anniversary commemorative livery]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 12 October 2014. Retrieved 13 October 2014.
E231系3000番台4両が配給輸送される [E231-3000 series 4-car set transferred]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 29 November 2017. Archived from the original on 29 November 2017. Retrieved 29 November 2017.
八高線用の209系3500番台が試運転 [Hachikō Line 209-3500 series undergoes test-running]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 21 February 2018. Archived from the original on 21 February 2018. Retrieved 21 February 2018.
trafficnews.jp
「スカ色」帯のE231系が運行開始 成田線我孫子~成田間開業120周年の記念列車で ["Suka-colored" E231 series begins operation on the Narita Line between Akibo and Narita]. Traffic News (in Japanese). Mediavague Co., Ltd. 30 April 2021. Retrieved 14 June 2022.
山手線用E231系4ドア車配給輸送 [Yamanote Line E231 series 4-door cars delivered] (in Japanese). 1 February 2010. Archived from the original on 4 October 2012. Retrieved 1 February 2010.
E231系トウ540編成が三鷹車両センターに転属 [E231 series set 540 transferred to Mitaka Depot]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 20 May 2016. Archived from the original on 11 June 2016. Retrieved 11 June 2016.
E231系3000番台4両が配給輸送される [E231-3000 series 4-car set transferred]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 29 November 2017. Archived from the original on 29 November 2017. Retrieved 29 November 2017.
八高線用の209系3500番台が試運転 [Hachikō Line 209-3500 series undergoes test-running]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 21 February 2018. Archived from the original on 21 February 2018. Retrieved 21 February 2018.