Ganseki, Underhook 1st tutorial
From AKBAN-wiki, the Martial Arts Database
Background - Ganseki, Under hook 1st tutorial
Moving diagonally back, catch the opponent's jab or front hand with your back hand, your front hand clinches the opponent's neck.
Keep pulling the opponent, the clinching hand should be flexible to prevent an elbow pop. This is the hand that maintains distance. The underhook hand keeps the opponent's hand in the crook of the elbow.
From this position you can knee the opponent in the face or create an opening for Uchimata or tai otoshi.
