Tai-Jitsu - Aiki-Waza. Emtpy Handed Defense Techniques. The Essence of Morihiro Saito Sensei’s Aiki. The techniques presented in this dvd are many and diverse, with no excess so that there be a good understanding. Once the principles of de aiki bukikai are assimilated perfectly, you can create a good many techniques, whatever the contact point with the opponent is.