Kimura
The kimura is the figure four shoulder lock named after Masahiko Kimura, who broke Helio Gracie's arm with it in 1951. The lead hand grips the opponent's wrist, the second arm threads behind the opponent's elbow and grips your own wrist, forming the figure four. Rotation of the trapped shoulder behind the opponent's back finishes the submission. This guide covers kimura mechanics and the entries from guard, side control, and north south.
Grappling AI scores the kimura on figure four lock integrity, wrist grip on the opponent's wrist (not forearm), and rotational angle. Professor Leo flags any kimura attempted with a forearm grip rather than a wrist grip.
What is Kimura?
The Kimura is a fundamental technique in Grappling that every practitioner should master. Used by competitive grapplers on the mats, it combines proper body mechanics, timing, and spatial awareness to create an effective movement pattern. Understanding the Kimura is essential for building a complete Grappling skill set. Professor Leo can provide personalized feedback on your Kimura execution through AI video analysis, scoring your form from 0 to 100 and identifying specific areas for improvement.
How to Perform Kimura
- 1
Begin in your standard Grappling stance with proper posture and balance. Ensure your weight is evenly distributed and you are ready to initiate the Kimura.
- 2
Initiate the Kimura by engaging your core and establishing the correct grip, position, or entry angle. Focus on proper body alignment throughout the setup phase.
- 3
Build pressure before the main action. Use footwork, posture, and timing to make the Kimura feel like the natural next movement instead of a forced attempt.
- 4
Execute the main movement of the Kimura with controlled power. Commit fully while keeping your head position, hips, and base connected.
- 5
Complete the follow-through phase, then recover to a stable position. A good Kimura ends with control, not with a scramble to regain balance.
Key Points
- Maintain proper posture and alignment throughout the entire Kimura
- Use your core and legs to generate power, not just your arms
- Focus on timing and precision over raw strength
- Keep your breathing controlled and rhythmic during execution
- Practice the movement slowly before adding speed and power
When to Use Kimura
- Use the Kimura when the opponent gives you the line, angle, or rhythm the movement needs. Forcing it from a dead position usually creates bad habits.
- For Grappling grapplers, the best time to drill this technique is after a warmup but before fatigue hides the technical errors.
- If the movement fails repeatedly, review the setup first. Most Kimura problems begin before the obvious finishing phase.
Practice Drills
Slow-motion mechanics
Run the Kimura at 30 percent speed for three rounds of five reps. Pause at the setup, entry, finish, and recovery so you can feel where posture or balance breaks down.
Constraint round
Spend one focused round on the mats where the only goal is creating the entry for the Kimura. Do not chase the finish until the setup is clean twice in a row.
Pressure variation
Add light resistance and repeat the Kimura from both your best side and your weaker side. In Grappling, the technique is useful only when it survives timing changes and imperfect positions.
Video review set
Record five attempts from a front angle and five from a side angle. Check whether the entry, power line, and recovery look the same across reps before increasing speed.
AI Scoring Rubric
Setup quality
The Kimura starts from a position where your base, distance, and timing make the action believable.
Body alignment
Head, hips, shoulders, and feet stay connected instead of pulling in different directions.
Power transfer
The movement uses the floor, core, and hips before the arms or upper body try to finish the job.
Recovery and control
After the Kimura, you can continue attacking, defend, or reset without giving away position.
Common Mistakes
Rushing the setup of the Kimura
Take time to establish proper position before initiating. A good setup leads to a successful execution.
Relying on upper body strength alone
Engage your hips, core, and legs to generate power. The strongest athletes use their entire body.
Losing balance during execution
Keep your center of gravity low and your base stable. Practice the movement at slower speeds until balance becomes natural.
Step by step execution
Position. Establish dominant control before initiating the kimura. Without position, the submission is a guess. Verify hip pressure, head position, and grip frame before you begin the finishing chain.
Off balance. Break the opponent's posture or base. The kimura requires the opponent to commit weight in a specific direction. If the opponent is centered and posted, your finish will be muscled, slow, and reversible.
Isolate the limb or angle. Strip defensive grips, peel hands, or shift hips to a 90 degree angle relative to the opponent. The kimura attacks one joint or one chokepoint. Multiple variables in play means you have not isolated.
Apply the finish. Slow, hip driven pressure. The kimura is finished by the legs and hips, not the arms. If you are pulling with biceps you are about to lose the position.
Hold for the tap. Many submissions are released a half second too early. Maintain pressure for two full seconds after you feel the opponent stop fighting. Release on the verbal or physical tap, not before.
Common mistakes
Rushing to the finish before establishing position. Athletes feel the kimura is close and abandon control. Fix: drill the position to finish ratio. Five seconds of confirmed control before any finishing motion. Use a partner with a clock.
Arm finishing instead of hip finishing. The kimura gets pulled with biceps and pectorals. Fix: cross the wrists and turn the head into the finish. The body does the work, not the arms. Test by finishing with hands palms up so biceps cannot engage.
Releasing on the first sign of compliance. The opponent fakes the tap or shifts to escape. Fix: hold the kimura for a full two count after the tap. Train this in slow rolling so it becomes reflexive in competition.
Drills to improve
Static positional rounds. 6 rounds of 3 minutes from the kimura setup position. Partner defends only, no escapes. You finish 5 reps minimum per round. Reset between reps. Builds the muscular and proprioceptive memory of the finish.
Live transition drilling. 4 rounds of 4 minutes, partner gives 50 percent resistance. Find the kimura from at least three different entries (top, bottom, scramble). Goal is to recognize the entry, not to force it.
Slow rolling with finish only. 3 rounds of 5 minutes at 30 percent intensity. Only the kimura can be finished. All other submissions are paused. Forces deep familiarity with the finishing chain in competitive context.
How Titans Grip scores this movement
Grappling AI scores the kimura on a 0 to 100 scale across four sub-scores: position confirmation (25), off balance and limb isolation (25), finishing mechanics (25), and control time (25). Professor Leo measures the seconds between entry and finish, the angle of your hip relative to the opponent, and the symmetry of your finishing pressure.
Scores above 85 indicate the kimura is competition reliable. Scores between 70 and 84 mean the technique works on lower belts but loses to skilled defense. Below 70 means the position is not yet stable enough to force the finish.
Why form matters for this technique
The kimura rotates the trapped shoulder behind the opponent's back through external rotation against a locked figure four grip. The lats of the attacker pull the trapped wrist toward the opponent's spine while the elbow stays bent at 90 degrees. In BJJ tournaments, the kimura is one of the most attempted submissions from side control and from guard because the figure four grip is hard to break once locked. A failed kimura lets the opponent extend the trapped arm, which converts the shoulder lock into a much weaker arm extension. Keeping the elbow bent at 90 degrees throughout the finish is the single most important detail.
Frequently Asked Questions
How long does it take to make the kimura a reliable finish?
For a coachable grappler training 3 times per week, the kimura becomes a reliable submission against same level training partners in 12 to 16 weeks. Reaching the level where it works on visibly higher belts requires 12 to 18 months of consistent application.
The variable is repetition count. Aim for 200 reps in drilling and 50 successful live finishes before considering the technique mastered.
Why does my kimura keep getting defended?
The most common cause is rushing the entry without establishing position. The opponent feels the lack of control and posts, frames, or scrambles before your finishing chain begins.
The second most common cause is arm finishing. Your biceps fatigue inside 6 seconds. The opponent waits you out and escapes when your grip slips.
Can I score the kimura without a coach watching?
Yes. Upload a 60 second clip of your roll to Grappling AI. The app identifies the kimura attempt, scores it 0 to 100, and assigns a single drill. The video stays on device.
Should I grip the wrist or the forearm for a kimura?
Grip the wrist, never the forearm. A wrist grip puts the lever directly on the joint that rotates, which makes the finish a small motion that requires little strength. A forearm grip puts the lever on the radius and ulna, which forces the attacker to fight the opponent's grip strength rather than their shoulder mobility. Slide the grip to the wrist before the finish.
Practice Kimura with AI Coaching
Get real-time kimura feedback from Professor Leo. Upload your training footage and receive a 0-100 technique score with detailed corrections.
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