Imagine you are in hidari hanmi and your left wrist is in the prangs of nikyo. Nage has your arm bent into an ‘S’ shape, and he is careful to press your te-no-ko into his shoulder while maintaining a good grip on your forearm (with his thumb properly wrapped).

Simply hook onto your own forearm (not wrist, and not his arm!) with your right hand and slide your whole left arm down while keeping the left arm relaxed. The nikyo waza is destroyed and a kaeshiwaza can be performed here.

The one we practiced at the time of this writing was opening Nage’s arms out to do an iriminage or a tenchinage.