01. Yoko-otoshi 横落

Yoko-otoshi 横落

Side Drop

Classification: Yoko-sutemi-waza (side sacrifice technique)
Translation:

Yoko = side
Otoshi = drop

Technical Description

Yoko-otoshi is a sacrifice technique where tori uses a sudden lateral drop to throw uke in a wide, sweeping motion.
After breaking uke’s balance to their right side, tori steps their left foot to the outside of uke’s right foot, then falls onto their own left side, using the pull of the arms to project uke diagonally over them and to the ground.

The key to this technique lies in committing to the fall, trusting that the momentum created will bring uke down with precision and control.

Biomechanics of Yoko-otoshi

This technique is based on a moment:

The force vector (Re) is extended and used to manipulate uke’s center of gravity.
Tori uses both arms (F1 and F2) to pull uke over and into the fall, while positioning their leg merely to block uke’s stepping path, not to lift.
The throw generates a centrifugal force—uke is projected in an arc as their support is removed and their motion redirected.

Did You Know?

In judo, everyone can be a tori, the one who throws—but not everyone can be a good uke, the one who takes the fall.

In Japan, judoka are tested in both roles during examinations. Only by demonstrating the ability to fall correctly and react appropriately can one truly show an understanding of judo. In fact, the role of uke is often considered more difficult, especially in kata. Uke initiates the action and must attack with commitment and realism, allowing tori to execute the technique with proper timing and control.

In competition, athletes often avoid being uke, but in the study and spirit of judo, a good uke is just as important as a good tori.