A further, concise insight into the Gutai movement; truly ground-breaking artists, considering the group formed in 1954:
http://www.nipponlugano.ch/en/gutai-multimedia/narrazione/project/narrazione_page-1_nav-short.html
This website emphasizes the group's interest in what they called 'painting actions' - as opposed to the 'action paintings' of the likes of Pollock (the painting functioning as a record of his movements and gestures) and others.
