So I listened to iri's cover of Higashi e Nishi e from the just released Yosui Inoue tribute album and fell in love with the song instantly (I highly recommend iri's version!), so naturally I had to go find out more about the song, and I came across this performance from the 1992 Kouhaku Utagassen:
Have I been missing out not watching Kouhaku? How often (probably not very) do they feature something this wild?