SAFETY: Kimura from Turtle targets the Shoulder joint, rotator cuff, and associated ligaments. Risk: Rotator cuff tear (supraspinatus, infraspinatus, teres minor, subscapularis). Release immediately upon tap.
The Kimura from Turtle is a powerful shoulder lock submission that capitalizes on the opponent’s defensive turtle position. When executed properly, this technique isolates the arm through a figure-four grip while controlling the opponent’s posture, creating significant torque on the shoulder joint. The turtle position provides unique mechanical advantages for the Kimura, as the opponent’s weight distribution and defensive posture naturally expose the arms. This submission can be approached from various angles including traditional top turtle control, front headlock positions, or transitional scrambles. The Kimura from turtle serves multiple strategic purposes: it can be used as a direct finish, as a powerful control position to break down the turtle and transition to back control, or as a means to roll the opponent and establish dominant top positions like mount or side control. The technique’s effectiveness stems from the combination of grip control, hip pressure, and proper angle creation that prevents the opponent from defending effectively while maintaining the structural integrity needed to apply safe, controlled pressure to the shoulder joint.
Category: Joint Lock Type: Shoulder Lock Target Area: Shoulder joint, rotator cuff, and associated ligaments Starting Position: Turtle From Position: Turtle (Top) Success Rate: 62%
Safety Guide
Injury Risks:
| Injury | Severity | Recovery Time |
|---|---|---|
| Rotator cuff tear (supraspinatus, infraspinatus, teres minor, subscapularis) | High | 3-6 months with surgery, 6-12 weeks conservative treatment |
| Shoulder dislocation (glenohumeral joint separation) | High | 6-12 weeks, potential chronic instability |
| Labrum tear (glenoid labrum damage) | High | 4-6 months with surgical repair |
| Biceps tendon strain or rupture | Medium | 4-8 weeks for strain, 3-6 months for rupture |
| AC joint sprain (acromioclavicular separation) | Medium | 2-6 weeks depending on grade |
Application Speed: SLOW and progressive - minimum 3-5 seconds application time in training, never explosive
Tap Signals:
- Verbal tap (saying ‘tap’ or any verbal submission)
- Physical hand tap on partner or mat (minimum 2 taps)
- Physical foot tap on mat or partner
- Any verbal distress signal or physical indication of pain
- Screaming or crying out
Release Protocol:
- Immediately stop all rotational pressure on the shoulder
- Maintain grip control while releasing rotational torque
- Gently lower the arm back to neutral position
- Release the figure-four grip slowly
- Allow partner to move shoulder freely and assess
- Check with partner verbally before continuing training
Training Restrictions:
- Never spike, jerk, or explosively apply rotational pressure
- Never use competition speed or intensity in training rolls
- Always ensure training partner has clear tap access with free hand
- Stop immediately at any sign of discomfort or resistance
- Never force the position if partner’s shoulder is already compromised
- Avoid training this submission on partners with pre-existing shoulder injuries
- Do not combine with sudden weight drops or dynamic movements
Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | game-over | 60% |
| Failure | Turtle | 25% |
| Counter | Half Guard | 15% |
Attacker vs Defender
| Attacker | Defender | |
|---|---|---|
| Focus | Execute and finish | Escape and survive |
| Key Principles | Establish firm figure-four grip with proper hand positioning… | Keep elbows tight to your body and knees throughout turtle t… |
| Options | 7 execution steps | 4 defensive options |
Playing as Attacker
Key Principles
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Establish firm figure-four grip with proper hand positioning before applying any rotational pressure
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Control opponent’s posture and prevent forward movement using body weight and hip pressure
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Create the proper angle by positioning perpendicular or slightly past perpendicular to opponent’s body
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Isolate the arm by keeping the elbow tight to your body and preventing escape routes
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Apply pressure through controlled rotation of the forearm toward the opponent’s head, not through explosive jerking motions
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Maintain constant connection between your chest and the opponent’s shoulder to prevent space creation
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Use your hips and legs to control the opponent’s base and prevent them from rolling through the submission
Execution Steps
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Secure initial arm control: From top turtle position, identify the exposed arm (typically the arm furthest from you or posting f…
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Thread your attacking arm: Thread your attacking arm (same side as their exposed arm) underneath their arm, moving from outside…
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Establish figure-four grip: With your threading arm now under their arm, reach across and grab your own wrist with your opposite…
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Adjust body position and angle: Once the figure-four is secured, adjust your body position to optimize leverage. Move your hips and …
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Break opponent’s base: Use your body weight and hip pressure to break the opponent’s turtle posture. Drive your chest into …
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Apply controlled rotational pressure: With everything secured, begin applying the submission by rotating their forearm toward their head (…
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Maintain control through finish or transition: If the opponent taps, immediately stop rotational pressure while maintaining positional control, the…
Common Mistakes
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Applying explosive rotational pressure or jerking the arm suddenly
- Consequence: Severe injury risk including rotator cuff tears, shoulder dislocation, and potential permanent damage to the shoulder joint
- Correction: Always apply rotational pressure slowly and progressively over minimum 3-5 seconds in training. The submission should feel like a continuous, controlled pressure increase. Focus on structural control and positioning rather than speed of application. Remember that in training, your partner’s safety is paramount.
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Failing to control opponent’s posture and base before attempting submission
- Consequence: Opponent easily escapes by rolling forward, standing up, or pulling arm back to safety, wasting the attacking opportunity
- Correction: Always establish dominant positional control first. Use your body weight, hip pressure, and leg positioning to break their base and control their movement before applying rotational pressure. The position should feel secure and stable before attempting the finish.
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Creating space between your chest and opponent’s shoulder during execution
- Consequence: Opponent can use the space to relieve pressure, turn into you, or escape the submission entirely
- Correction: Maintain constant chest-to-shoulder contact throughout the entire sequence. Your chest should be glued to their shoulder blade. Any space creation gives them defensive options. Think of your upper body as attached to their shoulder, moving as one unit.
Playing as Defender
Key Principles
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Keep elbows tight to your body and knees throughout turtle to deny arm exposure and prevent the attacker from threading their arm underneath
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Recognize the Kimura threat early through tactile cues and react before the figure-four grip is fully locked
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If the grip is established, immediately clamp the trapped arm to your body and deny the attacker chest-to-shoulder connection
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Use directional movement toward the trapped arm side to reduce the attacker’s leverage angle and create rolling escape opportunities
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Prioritize grip defense over positional maintenance - grabbing your own wrist, gi, or belt with the trapped hand buys critical time
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Never extend the arm away from your body or post with a straight arm when an opponent is positioned at your side in turtle
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Convert defensive situations into transitions by using the attacker’s commitment against them to recover guard or reverse position
Recognition Cues
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Opponent moves from directly behind you to a perpendicular angle (45-90 degrees to your torso), indicating they are establishing an attacking angle for arm isolation
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You feel your opponent’s hand controlling your wrist or tricep while their other arm begins threading underneath your arm from the outside
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Opponent’s chest pressure shifts from your back to your shoulder blade, combined with their hips driving forward into your side rather than sitting behind you
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Your opponent’s weight commits to one side of your turtle rather than staying centered behind you, suggesting they are isolating a specific arm
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You feel a figure-four grip locking around your arm with your elbow being pulled away from your body and toward the attacker’s torso
Escape Paths
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Roll toward the trapped arm side to invert the position, pulling the attacker over and recovering guard or half guard beneath them while their Kimura angle is disrupted
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Sit back into the attacker while turning to face them, inserting butterfly hooks or recovering closed guard to neutralize the shoulder lock angle
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Explosively stand while clamping the elbow tight, using the elevation change to break the attacker’s chest connection and transition to a standing grappling position
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Granby roll away from the trapped arm, using the rotation to extract the arm and recover a defensive guard position
From Which Positions?
Match Outcome
Successful execution of Kimura from Turtle leads to → Game Over
All submissions in BJJ ultimately converge to the same terminal state: the match ends when your opponent taps.