Glossary of Judo waza (techniques) terms

Ude-hishigi-waki-gatame (Armpit lock)

Ude-hishigi-waki-gatame (Armpit lock)

Summary

This is a hazardous Kansetsu waza (Joint locks) which easily draws a penalty.

Features of this Waza

In the Ude-hishigi-waki-gatame (Armpit lock) Waza, Tori (Player executing technique) twists Uke (Player receiving opponent's attack) arm around behind him and locks his elbow joint. This Waza contains hazardous elements.

Waza details

With Uke (Player receiving opponent's attack) in a prone posture, Tori (Player executing technique) grasps one of Uke (Player receiving opponent's attack) arms firmly by the wrist and pulls it strongly beneath his own armpit. Tori (Player executing technique) then spreads his legs widely apart for balance and to prevent the prone Uke (Player receiving opponent's attack) from escaping. Tori (Player executing technique) completes the armpit lock by pressing his armpit down against Uke (Player receiving opponent's attack) upper arm as if to push it to the floor. If this fails to achieve the desired result, Tori (Player executing technique) twists Uke (Player receiving opponent's attack) trapped wrist and turns his own body so that he's facing the ceiling, thereby bending Uke (Player receiving opponent's attack) arm joint in the backward direction.
This Waza is often transitioned to from a hold-down posture. When Uke (Player receiving opponent's attack) attempts to escape from the hold-down, he adopts a prone posture, then attempts to rise by placing his hand on the floor. At that moment, Tori (Player executing technique) scoops up that arm and pulls it beneath his armpit. When performed from a standing posture by sacrificing ones posture and executing an Ude-hishigi-waki-gatame (Armpit lock), Tori (Player executing technique) body falls on Uke (Player receiving opponent's attack) arm while it is in a precarious posture, possibly damaging the elbow ligaments or causing a bone fracture. Due to these hazards, such a maneuver will draw a penalty.
Although this Waza is prohibited in primary school and junior high student competition, it is allowed in high school and college level competition.