- Timing - after an attempted deashi when uke's front foot is weightbearing. Tori has made a tiny round-the-corner step and uke's back foot is just about to move forward.
- Direction - Uke's posture crumbles into the hole between his feet - 90 degrees to the line of his feet.
- Unintended action - uke had intended to step forward with his back foot to face tori, just like in kosotogari. Instead his step was blocked at the knee and his intention and momentum carried him into the hole.