"京葉線で通勤快速列車の運転終了" [Commuter Rapid service on Keiyo Line ended]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 16 March 2024. Retrieved 15 April 2024.
yahoo.co.jp
headlines.yahoo.co.jp
"ほぼ直線…外房線先頭車両が脱線 原因は?". headlines.yahoo.co.jp (in Japanese). 8 May 2020. Retrieved 9 May 2020.