"3週連続でE217系が減った…「クラY-26編成」…長野へ廃車にともなう配給輸送" [The number of E217 series trains has decreased for the third week in a row... "Kura Y-26 train"... Distributed to Nagano due to scrapping]. RM News (in Japanese). Japan: Neko Publishing. 3 June 2024. Retrieved 12 June 2024.
JR東日本、東海道線E217系の営業運転終了 – 「湘南色」の帯で活躍した車両 [JR East E217 series withdrawn from Tōkaidō Line]. Mynavi News (in Japanese). Japan: Mynavi Corporation. 19 March 2015. Retrieved 30 March 2015.
"E217系Y-2編成が長野へ" [E217 series set Y-2 sent to Nagano]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 13 September 2023. Retrieved 14 June 2024.
"E217系Y-18編成が長野へ" [E217 series set Y-18 sent to Nagano]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 9 November 2023. Retrieved 14 June 2024.
"E217系Y-20編成が長野へ" [E217 series set Y-20 sent to Nagano]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 19 October 2023. Retrieved 14 June 2024.
"E217系Y-23編成が長野へ" [E217 series set Y-23 sent to Nagano]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 6 June 2024. Retrieved 14 June 2024.
"E217系Y-24編成が長野へ" [E217 series set Y-24 sent to Nagano]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 11 April 2024. Retrieved 14 June 2024.
"E217系Y-46編成が長野総合車両センターへ" [E217 series set Y-46 sent to Nagano General Rolling Stock Center]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 17 February 2024. Retrieved 14 June 2024.
"E217系Y-108編成とY-110編成が長野へ" [E217 series sets Y-108 and Y-110 sent to Nagano]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 25 January 2024. Retrieved 14 June 2024.
"E217系Y-133編成とY-113編成が長野へ" [E217 series sets Y-133 and Y-113 sent to Nagano]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 13 June 2024. Retrieved 14 June 2024.
"E217系4連2本が長野へ". Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 18 April 2024. Retrieved 14 June 2024.
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Koyama, Kei (7 June 2020). "実はレア 引退時期が迫る横須賀・総武快速線E217系 どんな車両? 少数生産のワケ" [The rare, near-retirement Yokosuka-Sobu Rapid Line E217 series – what kind of vehicle is it, and what was the reason for low production numbers?]. Traffic News (in Japanese). Japan: Mediavague Co., Ltd. Retrieved 28 October 2022.