Purpose

control the secondary leg (destabilising the opponent requires controlling the secondary leg) and destabilisation to hips is a takedown (destabilisation through hands or hips) describe the mechanical principle that throws apply to: kuzushi is the sustained loading of weight onto a leg the attacker intends to remove. The throw itself is the removal action; kuzushi is the load that makes the removal effective. A throw without kuzushi is a wrestling-against-a-balanced-partner exercise — much harder, much lower percentage.

This drill isolates the loading action. No throw follows. The point is to feel — both as attacker and as receiver — what sustained loading on a single foot actually feels like, so the practitioner can recognise the moment in live exchange.

Setup

Both partners standing in over-under clinch with one collar tie. Partners agree on a “near foot” — the foot the attacker will load. The receiver’s role is to remain in stance and resist passively (no counter-attack, but also no collapse).

Execution

Step 1 — neutral: Stand in clinch with weight evenly distributed across both of the receiver’s feet.

Step 2 — load: The attacker uses the collar tie, the underhook, and a slight forward step to drive the receiver’s weight onto the near foot. Mechanically, this is a combined action: collar tie pulls the head down and toward the loaded side; underhook lifts and drives the loaded-side hip; attacker’s near foot steps slightly past the receiver’s centerline. The receiver feels their far foot become almost weightless.

Step 3 — sustain: Hold the load for three seconds. The receiver should feel their far heel rise, their weight stack onto the loaded foot, and their balance teeter. The attacker’s job is to keep the load sustained — a brief pull that releases is not kuzushi.

Step 4 — unload: Reverse the action. Release the head pull, drop the underhook tension, step back. Receiver returns to balance.

Step 5 — switch sides: Run the same sequence loading the opposite foot.

Run for two minutes — roughly six full cycles per partner.

Coaching Notes

The receiver’s report is the diagnostic. After the load, ask: “Where was your weight?” If the receiver can report that their far heel was off the ground and their weight was on the near foot, the kuzushi worked. If they say “even” or “I’m not sure,” the loading was partial — the head pull or the underhook drive was insufficient.

The three-second sustain is non-negotiable. Most practitioners can produce a brief moment of imbalance with a sharp pull; few can hold the loaded position. The throws that require sustained kuzushi (osoto-gari held through the reap, uchi-mata held through the lift) fail when the attacker’s load is brief. The drill builds the muscular and timing capacity to hold the load.

The cue “load the near foot, then think about removing it” reframes the throw mentally. Most new practitioners think of throws as a single explosive action. This drill replaces that mental model with a two-stage one: first build the load, then remove the loaded leg. The improvement in throw success is significant.

Common Errors

Pulling instead of loading: Attacker yanks the head down briefly. Receiver staggers but does not load. The pull is direction-only; the load is direction plus duration.

Lifting the receiver off the ground: Attacker drives the underhook so hard that the receiver’s feet leave the mat. This is not kuzushi — it is a body-lift, which is a different mechanism. The receiver’s feet stay on the ground; only the weight distribution changes.

Receiver helping: The receiver collapses preemptively to “feel” the kuzushi. The drill works only if the receiver maintains stance and the attacker actually generates the load. Coaches: watch for premature collapse and call it out.

Static feet: Attacker tries to load without stepping. The step is what creates the angle. Without the step, the attacker is pulling on a partner whose base is still under them.