 | pp. 78–79. JR西日本225系近郊型直流電車 [JR-West 225 series DC suburban EMU]. Tetsudō Daiya Jōhō Magazine. 39 (315): 70–71. July 2010. 225系近郊形直流電車 [JR-West 225 series... 19 KB (1,519 words) - 06:15, 15 January 2024 |
 | Retrieved 27 July 2023. 227系近郊形直流電車 [227 series suburban DC EMU]. Japan Railfan Magazine (in Japanese). 55 (647): 61–64. March 2015. JR車両のうごき [JR rolling stock... 37 KB (2,826 words) - 07:13, 7 April 2024 |
 | 2009. p. 256. ISBN 978-4-7770-0836-0. Fukuhara, Shunichi (August 2016). 121系近郊形直流電車のあゆみ part1 [The history of the 121 series suburban DC EMU trains (part... 11 KB (843 words) - 15:01, 18 July 2023 |
 | August 2017. Retrieved 2 August 2017. Fukuhara, Shunichi (October 2015). 719系近郊形交流電車のあゆみ part1:０番台の誕生 [The history of the 719 series suburban AC EMU Part... 14 KB (1,172 words) - 12:17, 24 November 2023 |
 | Japan: Neko Publishing. 4 December 2020. Retrieved 22 January 2023. 521系近郊形交直流電車 [521 series outer-suburban AC/DC EMU]. Japan Railfan Magazine (in Japanese)... 15 KB (1,245 words) - 01:25, 18 March 2024 |