From the attacker perspective, the Shoulder of Justice Kimura Setup is a methodical transition that converts relentless shoulder pressure into arm control. The attacker maintains their Shoulder of Justice position with maximum jaw pressure, patiently waiting for or actively provoking the opponent’s near arm to extend defensively. The moment the arm creates space between the elbow and the ribs, the attacker threads their near-side arm underneath the opponent’s tricep and secures a deep figure-four Kimura grip. The key is maintaining shoulder pressure throughout the grip establishment—if pressure releases during the transition, the opponent can retract the arm and reestablish their defensive structure. Success depends on the attacker’s ability to multitask: sustaining body weight pressure through the shoulder while simultaneously executing precise arm threading and grip locking mechanics.
From Position: Shoulder of Justice (Top)
Key Attacking Principles
- Maintain shoulder pressure throughout the entire Kimura grip establishment—never sacrifice pressure for grip
- Wait for genuine arm exposure rather than abandoning pressure to chase a shallow grip opportunity
- Thread your arm deep under the opponent’s tricep near the elbow, not near the wrist
- Lock the figure-four grip before attempting to extract or rotate the arm into Kimura Trap position
- Keep hips heavy and connected to opponent’s near hip line during the grip transition to prevent shrimping
- Use incremental pressure escalation to systematically break down the opponent’s arm discipline
- Transition smoothly from shoulder pressure focus to grip control focus without creating positional gaps
Prerequisites
- Fully established Shoulder of Justice position with shoulder blade driven into opponent’s jaw at 45-degree angle
- Hips low and connected to opponent’s near hip line preventing shrimping
- Wide stable base with far knee posted and near foot mobile
- Opponent’s near arm showing signs of defensive extension or framing—elbow lifting away from ribs
- Crossface control or head position preventing opponent from turning away during grip establishment
- Sufficient energy and patience to maintain pressure while waiting for optimal grip timing
Execution Steps
- Escalate shoulder pressure: Increase shoulder blade pressure into the opponent’s jaw by walking your feet slightly forward and driving your hips lower. Angle your shoulder at approximately 45 degrees toward their far shoulder. This escalation forces the opponent to choose between enduring increasing discomfort and extending their near arm to create relief. Maintain your base throughout this pressure increase.
- Identify arm exposure: Watch for the opponent’s near-side arm to extend, frame, or lift away from their ribs. The critical indicator is space appearing between their elbow and their ribcage. This can manifest as a push against your shoulder, a forearm frame against your neck, or simply their elbow rising as they try to create breathing room. This is your trigger to initiate the grip sequence.
- Thread near-side arm underneath: While maintaining shoulder pressure with your chest and upper body weight, slide your near-side arm underneath the opponent’s exposed tricep. Thread deep toward their elbow joint rather than staying near the wrist. Your arm should pass under their arm from the outside, with your hand emerging on the far side of their arm near their elbow. Keep your shoulder driving into their jaw throughout this threading motion.
- Secure figure-four grip: Grip your own wrist with your threading hand to establish the figure-four Kimura configuration. Your far hand maintains the wrist grip on the opponent’s trapped arm while your near hand locks onto your own wrist from underneath. Squeeze your elbows tight to your body to prevent the opponent from extracting their arm. The grip must be locked before you make any positional changes.
- Consolidate pressure and grip: With the figure-four grip secured, re-consolidate your shoulder pressure and hip connection. Drive your chest weight forward to pin the opponent’s trapped shoulder to the mat. Your hips remain connected to their near hip line. At this point you have dual control—positional pressure through your body weight and mechanical control through the Kimura grip. Test the grip security by applying slight rotational pressure.
- Begin Kimura Trap position establishment: Start transitioning from Shoulder of Justice pressure into full Kimura Trap control by slightly adjusting your hip angle to create the finishing position. Pull the opponent’s trapped arm across their body toward their far hip while maintaining chest pressure. Your weight shifts from pure shoulder pressure toward Kimura grip control. The opponent’s arm should now be isolated and controlled with your full body weight backing the figure-four lock.
- Complete transition to Kimura Trap: Finalize the Kimura Trap position by establishing your finishing angle. Walk your feet in a small arc toward the opponent’s head to increase leverage on the trapped shoulder. Your grip remains deep near their elbow with constant inward pressure. The opponent is now in the Kimura Trap system where you can pursue the finish, advance to mount, transition to back control, or spin to north-south—all while maintaining the devastating figure-four grip.
Possible Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | Kimura Trap | 55% |
| Failure | Shoulder of Justice | 30% |
| Counter | Half Guard | 15% |
Opponent Counters
- Opponent keeps near arm pinned tightly to ribs, refusing to extend despite pressure (Effectiveness: High) - Your Response: Incrementally increase pressure intensity by walking feet forward and dropping hips lower. Alternatively, briefly lift pressure then immediately reapply to provoke a reflexive arm extension. If arm remains tight, transition to mount advancement instead. → Leads to Shoulder of Justice
- Opponent explosively bridges and shrimps during the grip threading phase (Effectiveness: Medium) - Your Response: Ride the bridge by basing out with your far knee and maintaining hip connection. The bridge creates momentary arm extension that can actually assist your grip establishment. Re-consolidate pressure as the bridge exhausts and complete the threading. → Leads to Half Guard
- Opponent turns away toward turtle to prevent Kimura grip establishment (Effectiveness: Medium) - Your Response: Follow the turn and transition to back control or north-south rather than forcing the Kimura. Their turning motion exposes the back and creates alternative offensive pathways that may be higher percentage than continuing the Kimura pursuit. → Leads to Shoulder of Justice
- Opponent grabs their own belt or pants to prevent arm extraction into Kimura position (Effectiveness: High) - Your Response: Maintain the partial Kimura grip and use weight distribution to slowly pry their grip loose. Apply incremental rotational pressure while keeping their arm loaded. Alternatively, transition to an Americana attack which works with the same arm position but rotates in the opposite direction. → Leads to Shoulder of Justice
Test Your Knowledge
Q1: What is the optimal timing to initiate the Kimura grip threading from Shoulder of Justice? A: The optimal timing is immediately when the opponent’s near-side elbow lifts away from their ribs, creating space between the elbow and ribcage. This can happen as a reactive push against your shoulder, a forearm frame attempt, or simply the elbow rising from pain. The window is brief—typically one to two seconds—so the threading motion must be practiced to the point of reflexive execution.
Q2: Why must shoulder pressure be maintained throughout the grip establishment rather than momentarily released? A: Releasing shoulder pressure removes the stimulus that caused the arm to extend in the first place. The moment pressure lifts, the opponent’s near arm retracts to their ribs, closing the threading window. Additionally, pressure release allows the opponent to begin shrimping or turning, which disrupts your base and positioning. The shoulder pressure serves dual purposes: maintaining positional control and sustaining the defensive reaction that exposes the arm.
Q3: Your opponent extends their near arm to push your shoulder but immediately starts pulling it back—how do you respond? A: You must commit to the threading immediately upon seeing the initial extension, not wait for a sustained push. Thread your arm as fast as possible while the extension still exists, even if it is partial. A partial thread can still be converted to a Kimura grip if you drive your body weight forward to pin their arm in the extended position. Speed of recognition and commitment in the first half-second determines success.
Q4: What is the critical mechanical detail that differentiates a successful grip from one the opponent can break? A: Grip depth near the elbow versus near the wrist is the critical differentiator. A deep grip with the figure-four locked near the opponent’s elbow creates maximum leverage and prevents arm straightening, which is the primary grip-breaking mechanism. A shallow grip near the wrist allows the opponent to straighten their arm and use bicep strength to pull free. The threading arm must pass completely under the tricep before locking the figure-four.
Q5: What are the entry requirements that must exist before you attempt the Kimura setup? A: You need fully established Shoulder of Justice with shoulder blade driven into the jaw at a 45-degree angle, hips connected to the opponent’s near hip line, a wide stable base with far knee posted, and crucially, the opponent’s near arm must show signs of extension or lifting. Without established pressure and base, the threading attempt will fail because you lack the positional stability to maintain control during the grip transition.
Q6: Your opponent’s near arm is completely pinned tight to their ribs despite maximum pressure—what is your best response? A: Do not force the Kimura setup against a disciplined arm defense. Instead, capitalize on their commitment to arm protection by transitioning to mount advancement, as their arm tightness means they are not framing or creating escape space. Alternatively, briefly shift your pressure angle to create uncertainty, then snap back to the original line—this pressure variation can provoke a momentary arm extension that creates the threading window.
Q7: How does the direction of force change during the transition from Shoulder of Justice to Kimura Trap? A: In Shoulder of Justice, the primary force vector drives through your shoulder blade into the opponent’s jaw at a 45-degree angle toward their far shoulder. During the Kimura setup transition, the force gradually shifts from this downward-angled shoulder pressure toward rotational control of the opponent’s arm through the figure-four grip. The final Kimura Trap position uses the grip to control the shoulder girdle while body weight provides positional pressure. The transition is a gradual force redirection, not an abrupt switch.
Q8: If the opponent bridges explosively as you are threading your arm, should you abort the Kimura attempt? A: No, the bridge can actually assist the Kimura setup. The explosive bridge momentarily lifts the opponent’s torso and often causes their near arm to extend further for posting. Ride the bridge by basing out with your far knee while continuing the threading motion. As the bridge collapses, you are in an ideal position to lock the figure-four grip because the opponent’s arm is fatigued and their defensive structure is temporarily compromised from the failed bridge.
Q9: What chain attacks should you threaten if the Kimura setup is blocked repeatedly? A: If the Kimura is consistently blocked, chain to mount advancement when they keep their arm tight, north-south transition when they turn away from pressure, or Americana when their arm is trapped but rotated in the opposite direction. The shoulder pressure itself enables all these alternatives. By threatening the Kimura, you condition the opponent to protect their near arm, which often opens mount transitions as they stop framing. This attack chain makes the Shoulder of Justice a complete offensive system.
Safety Considerations
The Kimura grip applies significant rotational force to the shoulder joint. During training, establish the grip and position slowly enough for your partner to tap before shoulder damage occurs. Never jerk or explosively rotate the arm when transitioning from grip catch to Kimura Trap position. The shoulder pressure component of this technique can cause jaw discomfort and TMJ issues—communicate with your training partner about pressure intensity. Always release immediately upon tap and give your partner time to reset before repeating the drill.