丸藤正道
The wrestler stands behind their opponent and bends the opponent backwards. The wrestler tucks the opponent's head face-up under their armpit and wraps their arm around the head, so that their forearm is pressed against the back of the opponent's neck. The wrestler then pulls the opponent's head backwards and up, wrenching the opponent's neck. Naomichi Marufuji invented a single underhook variation, called "Perfect Facelock."