"209系2100番台の編成短縮と今後" [209-2100 series shortening and future] (in Japanese). Archived from the original on 30 January 2022. Retrieved 5 March 2021.
camel3.com
"来春運転の車両形式は「３０００系」です！" [The vehicle type for driving next spring is "3000 series"!] (PDF) (in Japanese). 11 December 2021. Archived(PDF) from the original on 12 December 2021. Retrieved 5 June 2022.
"りんかい線70-000形の顔した209系、川越線・八高線の営業運転から離脱" [Rinkai Line 70-000 type faced 209 series, withdrawal from commercial operation of Kawagoe Line and Hachikō Line]. tetsudo-ch.com (in Japanese). 4 November 2019. Archived from the original on 30 January 2022. Retrieved 5 March 2021.
hobidas.com
rail.hobidas.com
"ja:京浜東北線・根岸線209系引退で記念イベント" [ja: Keihin Tohoku Line / Negishi Line 209 series retirement commemorative event]. Hobidas (in Japanese). 14 December 2009. Archived from the original on 31 March 2015. Retrieved 5 March 2021.
"209系「ハエ53編成」がワンマン化改良工事を終了" [209 series "set number 53" completes improvement work for driver-only operation.]. rail.hobidas.com (in Japanese). NEKO PUBLISHING. 27 October 2021. Archived from the original on 28 October 2021. Retrieved 13 September 2022.
jreast.co.jp
"房総・鹿島エリアへの新型車両の投入について" [Information about new train type for the Boso/Kashima areas] (PDF) (in Japanese). 12 May 2020. Archived(PDF) from the original on 12 May 2020. Retrieved 12 May 2020.
在来線用試験電車MUE-Train (ミュートレイン)について [About the test train MUE-Train for conventional lines] (PDF). jreast.co.jp (in Japanese). 7 October 2008. Archived(PDF) from the original on 9 December 2008. Retrieved 7 October 2008.
railf.jp
八高線用の209系3500番台が配給輸送される [Hachikō Line 209-3500 series transferred]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 19 January 2018. Archived from the original on 20 January 2018. Retrieved 20 January 2018.
"209系2100番台，配給輸送される" [209-2100 series, distributed and transported]. Japan Railfan Magazine Online (in Japanese). 14 June 2009. Archived from the original on 16 October 2021. Retrieved 14 September 2022.
"209系C601編成が伊豆急へ" [209 series set C601 to Izukyu]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 24 November 2021. Retrieved 13 September 2022.
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.
"りんかい線70-000形の顔した209系、川越線・八高線の営業運転から離脱" [Rinkai Line 70-000 type faced 209 series, withdrawal from commercial operation of Kawagoe Line and Hachikō Line]. tetsudo-ch.com (in Japanese). 4 November 2019. Archived from the original on 30 January 2022. Retrieved 5 March 2021.
tetsudo-shimbun.com
JR南武線、全車両「E233系」に統一へ 青梅・五日市線から6両転属 [JR Nambu Line to be standardized with fleet of E233 series following transfer of 6 cars from Ōme/Itsukaichi Line]. tetsudo-shimbun.com (in Japanese). Japan: Tetsudo Shimbun. 26 January 2017. Archived from the original on 26 January 2017. Retrieved 26 January 2017.
"ja:京浜東北線・根岸線209系引退で記念イベント" [ja: Keihin Tohoku Line / Negishi Line 209 series retirement commemorative event]. Hobidas (in Japanese). 14 December 2009. Archived from the original on 31 March 2015. Retrieved 5 March 2021.
八高線用の209系3500番台が配給輸送される [Hachikō Line 209-3500 series transferred]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 19 January 2018. Archived from the original on 20 January 2018. Retrieved 20 January 2018.
"209系2100番台，配給輸送される" [209-2100 series, distributed and transported]. Japan Railfan Magazine Online (in Japanese). 14 June 2009. Archived from the original on 16 October 2021. Retrieved 14 September 2022.
"房総・鹿島エリアへの新型車両の投入について" [Information about new train type for the Boso/Kashima areas] (PDF) (in Japanese). 12 May 2020. Archived(PDF) from the original on 12 May 2020. Retrieved 12 May 2020.
"来春運転の車両形式は「３０００系」です！" [The vehicle type for driving next spring is "3000 series"!] (PDF) (in Japanese). 11 December 2021. Archived(PDF) from the original on 12 December 2021. Retrieved 5 June 2022.
JR南武線、全車両「E233系」に統一へ 青梅・五日市線から6両転属 [JR Nambu Line to be standardized with fleet of E233 series following transfer of 6 cars from Ōme/Itsukaichi Line]. tetsudo-shimbun.com (in Japanese). Japan: Tetsudo Shimbun. 26 January 2017. Archived from the original on 26 January 2017. Retrieved 26 January 2017.
"209系「ハエ53編成」がワンマン化改良工事を終了" [209 series "set number 53" completes improvement work for driver-only operation.]. rail.hobidas.com (in Japanese). NEKO PUBLISHING. 27 October 2021. Archived from the original on 28 October 2021. Retrieved 13 September 2022.
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.
在来線用試験電車MUE-Train (ミュートレイン)について [About the test train MUE-Train for conventional lines] (PDF). jreast.co.jp (in Japanese). 7 October 2008. Archived(PDF) from the original on 9 December 2008. Retrieved 7 October 2008.
"ほぼ直線...外房線先頭車両が脱線 原因は？" [Almost straight ... What is the cause of the derailment of the leading vehicle on the Sotobo line?]. headlines.yahoo.co.jp (in Japanese). 8 May 2020. Archived from the original on 13 May 2020. Retrieved 9 May 2020.
worldcat.org
プロトタイプの世界 – Prototype World (in Japanese). Japan: Kōtsū Shimbunsha. December 2005. OCLC170056962.
yahoo.co.jp
headlines.yahoo.co.jp
"ほぼ直線...外房線先頭車両が脱線 原因は？" [Almost straight ... What is the cause of the derailment of the leading vehicle on the Sotobo line?]. headlines.yahoo.co.jp (in Japanese). 8 May 2020. Archived from the original on 13 May 2020. Retrieved 9 May 2020.
