In the high-stakes chess match of Mixed Martial Arts, few moves are as feared—and as catastrophic—as the Kimura lock. It is a technique that transcends eras, a submission that has snapped the limbs of legends and crowned champions from the early days of Vale Tudo to the modern UFC octagon. While the Rear Naked Choke may be the king of sleeping opponents, the Kimura is the master of breaking them.
For the uninitiated, the Kimura might look like a simple tangle of arms. But to a seasoned practitioner, it is a devastating leverage system that targets the shoulder joint (specifically the glenohumeral joint) with ruthless efficiency. It is more than just a submission; it is a control mechanism, a sweeping tool, and a counter-wrestling weapon that every elite fighter must master.
From the historic dojos of Japan to the bright lights of Las Vegas, this is the ultimate guide to the Kimura lock—its anatomy, its legendary history, and its undeniable effectiveness in modern MMA.
The Anatomy of the Break: What is a Kimura?
The Kimura, known in Judo as Gyaku Ude-Garami (reverse arm entanglement) and in Catch Wrestling as the “Double Wrist Lock,” is a shoulder lock that utilizes a figure-four grip. The mechanics are brutally simple yet scientifically sound: the attacker isolates the opponent’s arm, bends the elbow at a 90-degree angle, and drives the wrist behind the opponent’s back towards their head.
This motion forces the shoulder into extreme internal rotation. The human shoulder is a ball-and-socket joint designed for mobility, but it has a hard limit. When the forearm acts as a lever and the attacker’s hips act as the fulcrum, the torque generated exceeds the structural integrity of the rotator cuff, ligaments, and eventually, the humerus bone itself.
- The Grip: The attacker grabs the opponent’s wrist with one hand (same side), threads their other arm under the opponent’s tricep, and grabs their own wrist. This creates the unbreakable “Figure-Four” connection.
- The Leverage: By keeping the opponent’s elbow pinned and rotating the wrist upward and backward, the pressure bypasses the muscular strength of the arm and attacks the joint directly.
- The Result: If the opponent refuses to tap, the result is often a spiral fracture of the humerus or a complete dislocation of the shoulder.
History: The Match That Named the Move
Most submissions in Brazilian Jiu-Jitsu (BJJ) and MMA have descriptive names: Armbar, Triangle Choke, Kneebar. The Kimura is unique—it is named after a man. That man was Masahiko Kimura, perhaps the greatest Judoka to ever live.
The date was October 23, 1951. The setting was the Maracanã Stadium in Rio de Janeiro. Masahiko Kimura had traveled to Brazil to face Hélio Gracie, the father of BJJ. Hélio was smaller, but his defensive capabilities were legendary. For 13 minutes, Kimura dominated the positioning, throwing Hélio repeatedly on the soft mats. Finally, Kimura secured a reverse ude-garami.
Hélio Gracie, possessing the indomitable spirit that would define his family’s legacy, refused to tap. Kimura applied the pressure. Hélio’s arm broke with a sickening snap. Still, he did not tap. It was Hélio’s corner (specifically his brother Carlos) who threw in the towel to save him from further permanent damage. Impressed by the technique that defeated their grandmaster, the Gracie family began referring to the lock simply as “The Kimura.” The name stuck, bridging the gap between Judo and BJJ forever.
Why the Kimura Rules Modern MMA
In the early UFCs, the Kimura was often just a finishing hold. Today, it has evolved into a comprehensive system known as the “Kimura Trap.” Elite fighters use the grip not just to finish, but to advance position.
1. The Ultimate Anti-Wrestling Weapon
One of the most effective uses of the Kimura in modern MMA is as a counter to the single-leg takedown. When a wrestler shoots in and grabs a leg, their head is often exposed on the outside. A savvy defender can loop their arm over the wrestler’s tricep and lock up the Kimura grip. This immediately threatens the shoulder, forcing the wrestler to abandon the takedown or risk being rolled over.
2. The Sweep Engine
From the bottom guard, the Kimura is a high-percentage sweep. By locking the grip and uncrossing their legs, a fighter can use the leverage of the captured arm to flip their opponent over, landing in a dominant top position (side control or mount). This “Kimura Sweep” is a staple in the arsenals of grapplers like Charles Oliveira.
3. Positional Control
Even if the submission isn’t finished, the grip allows for total control of the opponent’s posture. A fighter can use the Kimura grip to transition to the back, set up armbars, or simply pin an opponent to the mat to land strikes. This utility makes it a “Swiss Army Knife” of grappling techniques.
Legendary Kimura Finishes in the Octagon
While hundreds of fights have ended via Kimura, a few stand out as historic milestones in the sport’s evolution.
Frank Mir vs. Antônio Rodrigo Nogueira (UFC 140)
This is widely considered the greatest submission finish in heavyweight history. Frank Mir, the first true heavyweight submission artist of the UFC, found himself in deep trouble against the legendary “Big Nog.” Rocked by punches, Mir looked to be on the verge of a TKO loss. In a scramble that defied logic, Mir recovered, locked up a Kimura, and rolled Nogueira over.
Nogueira, like Hélio Gracie decades before him, refused to tap. Mir, understanding the mechanics perfectly, torqued the arm until the humerus snapped audibly on the broadcast. It was a brutal reminder of the technique’s power and Mir’s technical brilliance.
Kazushi Sakuraba: The Gracie Hunter
Japanese legend Kazushi Sakuraba made a career out of hunting the Kimura (which he called the Double Wrist Lock from his Catch Wrestling background). He famously used it to dismantle the Gracie family, defeating Royler and Renzo Gracie using the very technique named after the man who beat their father. His finish of Renzo Gracie—where he snapped Renzo’s arm as Renzo stoically refused to submit—is an iconic moment in MMA history.
Khabib Nurmagomedov vs. Michael Johnson (UFC 205)
While Khabib Nurmagomedov is known for his mauling style, his finish of Michael Johnson at UFC 205 was a masterclass in Kimura mechanics. Khabib trapped Johnson’s arm in a crucifix position but couldn’t get the angle. He calmly transitioned, isolating the arm and applying the Kimura torque slowly and methodically, forcing the tap while telling Johnson, “You have to give up.”
Kimura vs. Americana: What’s the Difference?
Beginners often confuse the Kimura with its sibling, the Americana (also known as the Keylock or Paintbrush). Both are figure-four shoulder locks, but they attack the joint in opposite rotations.
- The Americana: The opponent’s arm is bent at 90 degrees with the palm facing up (towards the ceiling). The rotation is external, pushing the wrist down towards the hip. It is typically done from top mount or side control.
- The Kimura: The opponent’s arm is bent with the palm facing down (or behind the back). The rotation is internal, pushing the wrist up towards the head. It is more versatile and can be applied from the top, bottom, or even standing.
Think of the Americana as painting the floor with the back of their hand, while the Kimura is like forcing their hand into their back pocket—and then pulling it out through their shoulder blade.
How to Defend the Kimura
Once the grip is locked, escape becomes difficult, but not impossible. The key is to prevent the arm from being pulled behind the back.
- Grip Your Own Shorts: The most immediate defense is to grab the inside of your own thigh or shorts. This creates a closed loop that is hard to break.
- Posture Up: If you are on top (in the opponent’s guard), posturing up prevents them from getting the necessary angle to apply torque.
- The Re-Roll: Advanced grapplers will often roll with the pressure. If an opponent attacks the Kimura from the bottom, the top fighter can forward roll over the opponent, often escaping the lock or even reversing the position to take the attacker’s back.
Conclusion
The Kimura is a testament to the effectiveness of leverage over brute strength. It remains one of the “Big Five” submissions in MMA (alongside the Rear Naked Choke, Guillotine, Armbar, and Triangle) because it works at every level of the game. Whether you are a white belt stepping onto the mats for the first time or a UFC champion defending your belt, the Kimura is a tool you cannot afford to ignore.
Frequently Asked Questions (FAQ)
Is the Kimura lock dangerous?
Yes, extremely. The Kimura targets the shoulder joint and the humerus bone. Unlike chokes, which put an opponent to sleep, a Kimura can cause spiral fractures, torn rotator cuffs, and dislocated shoulders instantly if the opponent does not tap in time. It requires responsible application in training.
Can you do a Kimura from the standing position?
Yes. The “Standing Kimura” is often used against the fence in MMA. Fighters like Frank Mir and Demian Maia have used it to damage opponents or drag them to the mat. It is also a common counter to a takedown attempt against the cage.
Why is it called the “Double Wrist Lock” in Catch Wrestling?
In Catch Wrestling, the move is named descriptively. You are using both of your hands (wrists) to lock one of their wrists/arms. The term “Double Wrist Lock” predates the “Kimura” name, but after Masahiko Kimura’s victory over Helio Gracie, the latter name became the standard in BJJ and MMA circles.
How long does it take to learn the Kimura?
The basic mechanics of the Kimura can be learned in a few classes. It is often one of the first submissions taught to beginners because the figure-four grip is intuitive. However, mastering the nuances—such as using it for sweeping, the “Kimura Trap” system, and finishing against elite defense—takes years of practice.
