This is an extremely advanced application of principles from the Gyokko Ryu Chu-Ryaku no Maki “Middle Scroll” of training methods. An-shu Stephen K. Hayes shows how to capture a knifer’s attack. Once captured, he then stays with it long enough to sense where the attacker is going, and he accommodates the attacker in a way that turns into an outward wrist lock takedown. Though not a kata included in the To-Shin Do curriculum, Da Shin is taught as an exercise to develop sensitivity to the attacker’s movements. You learn a way to frustrate and eventually overpower your assailant.