Glossary of Judo waza (techniques) terms

Sumi-otoshi (Corner drop)

Sumi-otoshi (Corner drop)

Summary

This Te waza (Hand techniques) is also referred to as the Kuki-nage (Air throw).

Features of this Waza

The Sumi-otoshi (Corner drop) Waza begins in the same manner as the Uki-otoshi (Floating drop), in that the opponent is induced to take a step back, with the Waza then being applied in the moment when he brings that foot forward again.

Waza details

From the natural posture, Tori (Player executing technique) grasps Uke (Player receiving opponent's attack) mid-sleeve area, as deeply as possible. Tori (Player executing technique) then aggressively forces Uke (Player receiving opponent's attack) back in order to induce him to then bring a foot forward in retaliation.
The force with the retaliatory foot is brought forward at this time is generally proportional to the force of the aggression which was applied. At the moment Uke (Player receiving opponent's attack) steps forward, Tori (Player executing technique) extends his leg to act as a fulcrum. Tori (Player executing technique) pulls Uke (Player receiving opponent's attack) in the direction of the grasped sleeve, pulling his Center of gravity against the extended leg. At the same time, Tori (Player executing technique) other hand (which is grasping Uke (Player receiving opponent's attack) collar) pulls Uke (Player receiving opponent's attack) chest upward.
Uke (Player receiving opponent's attack) body then rotates over Tori (Player executing technique) fulcrum leg and he falls to the floor.
The best time to apply this Waza is when the opponent moves forward in an aggressive attack, or when he stops an attack and moves backward. Although this Waza appears to be executed by hand work alone (thus earning it the "air throw" name), subtle body motion is also required in order to destabilize the opponent, with the opponent being thrown by the resulting force. Therefore, this Waza is executed using the entire body.