A rare bird. JR Hokkaido's new MAYA35-1 track inspection car, built at Hitachi Kasado Works, should be arriving at Teine by Friday the 12th. Off the top of my head I don't recall the last track inspection vehicle built. It seems like it's been a while.
http://railf.jp/news/2017/05/09/120000.html
video by Ayokoi
by Watanabe Yo at Kyoto Station
by tobu8111f at Akita (gettin' there!)
by Masaharu Aono
https://www.youtube.com/watch?v=8xJEPp09_Og
edit: additional vids