Descriptions of the Aiki-taiso from Rod Kobayashi-Sensei:
2. Sankyo Undo
From a natural stance, look at the back of your left hand with fingers pointing downward, then grasp the blade of your hand with your right hand. The "One" count has you twist your left hand with your right hand as you move your left elbow diagonally forward. keep the elbow bent so that you feel the twist in your upper arm.
Release your hand and repeat several times for each hand.