"JR東日本に新型車両2形式 – E129系とディーゼルハイブリッド車両HB-E210系" [Two new train types for JR East: E129 series and diesel hybrid HB-210 series]. Mynavi News (in Japanese). Japan: Mynavi Corporation. 2 July 2013. Retrieved 3 July 2013.
東北本線と仙石線を接続、直通運転へ [Tohoku Main Line and Senseki Line to be linked with through-running]. Tetsudo.com (in Japanese). Japan: Asahi Interactive Inc. 19 October 2012. Retrieved 22 October 2012.