Judo Level 6: Tani Otoshi — The descent is not a collapse onto the knee

谷落, tani-otoshi, combines valley and drop and belongs to side sacrifices.

Backward imbalance relates to leg placement and sideways descent, not trapping a knee and pressing down with body weight.

Tani-otoshi takes uke off balance backwards, with tori sliding a leg behind and descending sideways to draw down. Kodokan describes a torso movement path, not dropping weight onto the partner's knee or weight-bearing leg.

Sukui Nage is driven by scooping, while Tani Otoshi uses sacrifice. A similar position behind the partner does not make them identical.

Use backward imbalance to distinguish it from yoko-otoshi and uki-waza. A final pose with tori beside uke may look similar across those techniques.

Do not attempt surprise counters without an instructor setting the form. Avoid falling onto a loaded leg; stop if legs entangle or control is lost.

The Level here refers to the IMAC Dojo curriculum. Use the article and clips to prepare questions and review them with your instructor. Practical training needs a suitable partner, space and controlled conditions.

Before the descent, check whether uke has a backward path and upper-body control remains. Have the instructor closely check leg position rather than inserting a leg and sitting down to test whether the partner falls.