Sumi Gaeshi (Standing)
Sumi gaeshi (standing context) — sacrifice throw where the attacker falls backward while elevating the opponent's near leg.
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Sumi gaeshi — the corner throw — is a standing sacrifice throw in which the attacker deliberately falls backward to the mat while hooking and elevating the opponent’s near leg. The opponent’s loaded weight, deprived of its base, rotates forward over the attacker’s elevating leg and lands on their back as the attacker arrives in mount, rear control, or top scarf adjacent. It is one of the highest-percentage no-gi sacrifice throws because the entry is invisible until commitment and the failure mode lands in a usable bottom position rather than a back exposure.
This page covers the standing-context throw — the sacrifice throw initiated from a clinch in which both players are upright. The same name and similar mechanics also describe the seated guard sweep used to elevate a passing opponent, but the entry conditions and finish geometry differ from the standing version.
INV-13Invariant "Destabilisation precedes control. An opponent who retains structural balance can generate defensive force regardless of the position they are in."
Why it works hereThe kuzushi loads the opponent forward over their near foot — the body lock or underhook clinch pulls them onto the toe of the lead leg before the attacker's seat hits the mat. Without this forward load the throw becomes an abandoned posture: the attacker sits down and the opponent steps back to standing. The forward kuzushi must arrive before the sit, not as a result of it.
See full invariant page → INV-04Invariant "The angle of applied force relative to a joint — not the size or strength of the applicant — determines leverage. Changing the angle changes the leverage equation."
Why it works hereThe elevating shin meets the opponent's inner thigh on a vertical line through their near hip — the force is directed up-and-over rather than back-and-down. A shin that hooks low (calf or ankle level) produces a horizontal trip rather than a rotating elevation; the lever arm is wrong and the opponent posts the far foot. The shin contact point is the geometric input that converts the sit-back into a rotation.
See full invariant page → INV-17Invariant "Structural load placed beyond the reach of muscular resistance makes strength irrelevant to the outcome."