Ude-garame
(figure four or entangled armlock)

"This technique can be applied from numerous positions, this is just one of them.
Uke is on his back. Aproach Uke from his right side and with your left leg stretched, lean accross Uke's chest and place your right knee on his hip, exerting preasure to prevent him from moving.With your left hand grip Uke's left wrist, which should lie with palm facing away from you. Take your right hand and slip it underneath Uke's elbow, to grip your own left wrist. Submission is achieved by curling your left hand into the mat,causeing Uke's palm to be facing the mat; now raise your right wrist and elbow slightly from the mat."