This research aims to use the effect of additional prompted force (free swing of parties) on the kinatic chain of joho kaiten tobi Shuto uke . Methods: The researchers used the descriptive method using biomechanical analysis based on video and kinematic analysis using Simi Motion program 3D by using (8) camera at a frequency of 100 cadres / second and force plate form The study sample is an international karate player Results: The researchers reached the following conclusions that the percentage of additional prompted force during the moment of damping (50%) was (22%) for the arms and (28%) for the free leg , while the moment of breaking the contact with the ground (37%) was represented in ( 12%) for the arms and (25%) for the free leg. There is also an inverse relationship between the time of damping and the maximum height of the center of gravity of the body and the direct relationship between the additional prompted force and the maximum height of the center of gravity of the body. Recommendations: The necessity of teaching the skill of Joho Kaiten Tobi Shuto Uke by total way and not to defragment the skill, as well as designing specific exercises based on the Swing of the free parties (additional prompted force in the arms and the free leg).