Irimi Ashi Sweep
The irimi ashi sweep: stepping into the opponent's space while controlling a leg to unbalance and force the sweep.
Adapted from InGrappling, Irimi Ashi Sweep. System Games did not invent this curriculum.
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Manage injuries →Position map Connects to 5 positions across 2 relationshipsOpen in the map →12345←Enters from
Irimi ashi — entering leg — is a movement-based sweep drawn from judo footsweep principles applied from the bottom guard position. The bottom player inserts their lead foot behind the passer’s lead ankle as the passer steps or closes distance, and reaps the ankle while simultaneously pushing at the hip. It is a single-leg reap from below: the bottom player does not wait for the passer to be off-balance and then sweep — they create the imbalance through committed movement into the passer’s space.
The defining characteristic is the “irimi” — the entering component. The bottom player’s hips must move forward and upward toward the passer to generate the sweeping force. A foot reap without hip commitment produces no mechanical effect. The sweep lives or dies on whether the bottom player commits their body mass into the movement. This is what makes it advanced: static guard players rarely develop the movement instinct the irimi requires.
Unlike most guard sweeps, which are applied from a defensive or neutral position, the irimi ashi requires the bottom player to move toward the passer — a counterintuitive motion when under pressure. This timing and directional commitment is the primary skill gap between developing and advanced practitioners attempting this technique.
INV-G04Invariant "Destabilising the top player to their hands removes their ability to pass and creates submission opportunities. Forcing a hand post is the transition from defensive guard to offensive guard."
Why it works hereThe hand on the passer's far hip pushes the upper body forward and away from the reaped leg, separating the upper body's direction from the lower body's. With the hips committed forward and the ankle going backward the passer can only post — and that post is the offensive moment the bottom player rides up to top position. The hands here are not for control but for forced directional separation.
See full invariant page → The hand controls in irimi ashi serve a specific purpose: they redirect the passer’s upper body away from the foot being reaped. As the foot reaps the ankle backward, the hand on the opposite hip pushes that hip forward and away — the upper body and lower leg move in opposing directions, creating the rotation. Without the hand disruption, the passer can lean forward onto the side being swept and absorb the reap. The hands do not control for submission — they control for directional separation.