Tani Otoshi

The Throw

From the right self-defense position, force your opponent off balance to the rear, step in deep behind their legs with your left leg, fall to your left front, and throw them.

Attacking

1. When your opponent put weight on his left foot, force them off balance by pulling your left hand and swinging your right elbow up and around.
2. Slide your left foot into a positon where the toes point out and your ankle is against your opponent’s right heel. You must put this leg far enough into your opponent’s position to reach their left foot.
3. Fall forward to the left, and throw your opponent so that they fall facing up.

Video

Here is a video demonstration of tani otoshi.