nikkyo

Nikkyo, also written nikkyō and meaning "second technique," is a wrist-lock control used in aikido and some related grappling arts. It is traditionally the second technique in the early progression of wrist-lock controls, following ikkyo and preceding sankyo and other variations.

In typical practice, nikkyo is entered from a wrist grab or a similar control position. The practitioner (tori) steps in, rotates the opponent’s wrist inward, and flexes the arm so the elbow points downward. By guiding the forearm in a small but decisive arc and applying pressure to the wrist, the attacker’s arm is bent and the hand is drawn toward the chest, often accompanied by a pin to the elbow. The effect is a restrictive, painful control that compels the uke to yield, allowing for a safe disengagement or transition to further technique.

Nikkyo emphasizes control through timing, body alignment, and minimal force. Proper execution relies on maintaining balance, off-balancing the partner, and using the opponent’s own momentum to create the lock rather than relying on strength alone. Because it can cause significant discomfort or injury if misapplied, it is taught with an emphasis on safety, full ukemi (breakfalls), and progressive resistance during training.

Variations exist across schools and lineages, with differences in grip, entry angles, and whether the emphasis is on nerve pressure, joint control, or a combination. Nevertheless, nikkyo remains a foundational technique in many aikido curricula, integrated into drills, randori, and self-defense applications.