uke attacks with a diagnol knife cut twoards the side of nage’s head, Nage enters as soon as the attack is initiated, raising both is important to control uke’s centerline and attacking (knife-holding) hand.
with the turn of the hip and cut downward, nage breaks uke’s balance nage holds uke’s hand and kaitens behind uke, and then switches to a sankyo grab, turning his hips to point the tanto at uke’s center