Ikkyo (first principle) 7th form attack

Your partner punches to your stomach with his right fist. Step back with your left foot towards your right corner. Your right grasps the top of his wrist. Take it in a downward movement by bending your knees slightly. When you feel your partner resist slightly bring his arm back into him. Your left hand should be just above his elbow pushing towards his head. Step in with your left foot, pushing him into the mat. Make certain that his body and arm are flat on the mat. Push his arm more than ninety degrees towards his head. Put pressure on his arm with your arms so as to immobilise him.