https://commons.wikimedia.org/wiki/File:JR_East_E531_series_T%C5%8Dhoku_Main_Line_test_run_20171005.jpg?uselang=jahttps://commons.wikimedia.org/wiki/File:JR_Shirasaka_sta_001.jpg?uselang=jahttps://www.youtube.com/watch?v=CuUhH3CQLqQ
http://www.nicovideo.jp/watch/sm36876659
