Another video clip, this time of Nishio Sensei himself:
http://www.youtube.com/watch?v=D8uJhC5wZug
Notice the similarity of
kaiten-nage, executed with empty hand and with weapon (
ken-no-tebiki).
In a later part of the clip, note how the movement of drawing the sword becomes an entry for
udekime-nage, and how what looks like a throw is really an
atemi.
Again illustrating how weapons are an extension of the body and that there is a union of principles (
riai) between the use of weapons and
taijutsu.