Kote Gaeshi in Aikido - "Wrist Turn-Out" Technique
As is true of Shiho Nage, Kote Gaeshi (Wrist Turn-Out), can end in either an immobilization or a projection. Its functional characteristics, however, as Uke is being brought down to the mat, will be substantially the same. The illustrations show your basic position upon the completion of the preliminary motion of evasion, extension, and centralization. The hand of Uke (the right one here) will be gripped as illustrated. Your left thumb will apply pressure upon his knuckles between the fourth or ring finger and the little finger. Your other fingers will close around his thumb and palm. From that position you will extend his hand back and over his forearm; this torsion upon his arm will unbalance his entire body and open the way for his fall.
Particular attention should be paid to the angle of the wrist torsion. Since too wide an angle may cause dislocation of the wrist, the Aiki method emphasizes that you should fold his fingers back toward his forearm rather than stretch his hand out and over in a Gyaku position. You should also try to keep his right hand low so that his fall will not be a heavy one and he will be able to slide down sideways onto the mat. Otherwise – and this is only safe for experienced performers – he may be forced to perform a high somersault over his own outstretched, turning arm. In either case, however, he will fall onto his back.
Kote Gaeshi, depending upon the circumstance of the attack of course, may sometimes end with the projection of Uke onto the mat. This will usually be the case when you are engaged in a defensive action against more than one assailant.