Glossary of Judo waza (techniques) terms

Sumi-gaeshi (Corner throw)

Summary

This Waza resembles the "Sambo" martial arts which originated in the former Soviet Union.

Features of this Waza

The Sumi-gaeshi (Corner throw) consists of destabilizing the opponent in the forward direction, and then inserting a leg between the opponent's legs, dropping onto one's back, and then throwing the opponent back over one's head.
From the Kenka yotsu (Asymmetrical grips by the two opponents) stance, Tori (Player executing technique) grasps the back of Uke (Player receiving opponent's attack) uniform with his Tsurite (Lifting hand), using that hand together with his Hiki-te (Pulling hand) to pull Uke (Player receiving opponent's attack) forward.
At the moment when Uke (Player receiving opponent's attack) balance is destabilized in the forward direction, Tori (Player executing technique) falls backward with his foot hooked in Uke (Player receiving opponent's attack) crotch, and throws him over his head in a sudden motion.
Tori (Player executing technique) performs the throw by hooking the instep of his foot in Uke (Player receiving opponent's attack) crotch, followed by an upward kicking motion.
In actual competition, this Waza is often occurs from a stance in which both combatants are sideways to each other, with both their Hiki-te (Pulling hand) free. When one of the combatants makes an aggressive move to obtain a Hiki-te (Pulling hand) grasp, the other combatant submarines feet first beneath him and executes this Waza.

Waza details

The Sumi-gaeshi (Corner throw) is a Ma sutemi waza (Supine sacrifice techniques), and is which are performed while in motion.
Although it is uncommon among Japanese combatants, it resembles the "Sambo" martial arts of the former Soviet Union, and Russian and Georgian combatants, etc., are particularly skillful in its use.