JR東日本、特急「湘南」デビュー - E257系リニューアル車両で運転 [JR East deploys refurbished E257 series sets on the "Shonan" limited-express]. Mynavi News (in Japanese). Japan: Mynavi Corporation. 2021-03-15. Archived from the original on 15 March 2021. Retrieved 7 July 2022.
web.archive.org
JR東日本、特急「湘南」デビュー - E257系リニューアル車両で運転 [JR East deploys refurbished E257 series sets on the "Shonan" limited-express]. Mynavi News (in Japanese). Japan: Mynavi Corporation. 2021-03-15. Archived from the original on 15 March 2021. Retrieved 7 July 2022.