There are other such videos of 1435mm rolling stock being transported on temporary 1067mm trucks (Keisei Skyliner AE and some subway rolling stock comes to mind), but it's pretty rare, and it's very interesting to see this train behind a DE10 and EF65. In the description, ayokoi (uploader of the first video) says that up to now, transport had been by sea to Sendai. This is set Z9 being transported from Kawasaki's Hyogo Works to JR East's Akita Shinkansen Depot.
JR West and JR Central territory, by ayokoi:
Going through Nagoya station, by sinkaisoku225:
YT uploader tobu2181 caught it at Omiya behind EH200-22:
On the Takasaki Line, by JyunichiroGotou:
Tetsudo Fan News: http://railf.jp/news/2013/06/02/105000.html
Ompuchaneru thread: http://rail-uploader.khz-net.com/index.php?id=1098097