There are many variations of this technique. Once you get the concept of this figure-4 lock down it becomes a very forgiving technique although it must be used carefully. It also has great law-enforcement applications as a takedown and come-along control hold.
Jujitsu Technique No. 9: Armbar Rear ThrowJapanese Translation: UDE GURUMA USHIRO 1) Assume a ready position as you face an attacker. 2) If your attacker swings with an overhead club, cross-block in the same manner as the corkscrew technique. 3) Continue to block with your right forearm while your left hand grabs his right wrist and hand. (The first two fingers of your left hand should be on the back of his right hand.) 4) Release the block with your right forearm and use the outer edge of your right hand to strike down on the attacker's elbow to bend it. Bend his hand at the same time by pushing with your left hand. 5) Move your right arm under his upper arm and clamp your onto the back of his hand. Simultaneously step forward with your right foot. 6) Step forward with your left foot as your bring both your arms down. CAUTION: Execute this phase slowly and go only as fast as your partner can fall. It is quite possible to tear the shoulder out of its socket. 7) If you choose to do a shoulder-lock submission, drop down with the attacker on your right knee. Your left hand should rest on the back of his elbow. Push his elbow away from you as you pull his wrist toward you for submission. NOTE: This is a very traditional way to learn this shoulder lock. There are numerous variations to setting up this very effective lock.
Learn more jujitsu techniques from George Kirby with our FREE guide—Basic Jujitsu Techniques: 4 Budoshin Moves to Improve Your Jujitsu Weapons Training.