The second technique in the applications (or pins) series. The premise of this technique is that the wrist is turned so that the little finger of the attacker cuts through his centre line. Many variants of this technique exist, but all rely upon this theory to function correctly.
This is an excellent example of how Aikido techniques exploit the movement of human joints; if applied correctly this technique can be devastating, feeling as if one has had one’s wrist struck with a blade, or can purely be used as restraint, only causing real pain upon resistance.
Nikkyo is effective against even large opponents. A simple turn of the wrist in one direction while the forearm and elbow are bent, nikkyo can be done against your shoulder, with your hand alone, or purely using rotation of the wrists.