Gooseneck Wrist Lock (Nikyo): Ultimate Self-Defense Technique #aikido #hapkido #martialarts
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Extension·Weapons Defense Academy
Gooseneck Wrist Lock (Nikyo): Ultimate Self-Defense Technique #aikido #hapkido #martialarts Advance your weapons defen…
Translation: extension
Range & classification
Category
Strike & defenceLocksClose rangeFighting multiple people
Distance
CloseMiddleLong
Body target
Upper bodyMiddle bodyLower body
Overview
Wrist extension locks force the hand backward (dorsiflexion), hyperextending the wrist joint and stressing the palmar ligaments and flexor tendons. [1],[2] The gooseneck is the classic wrist extension lock — the attacker bends the opponent's hand backward toward the forearm. Figure-four wrist extensions use a two-on-one grip for additional leverage. Kote-gaeshi in aikido is a throwing technique that uses wrist extension with rotation. [3],[4]
History & Origin
Country of origin· shown in random order
- BrazilBJJ, Submission Grappling, MMA
- Japan伸ばし(Nobashi)BJJ, Judo, Submission Grappling
- USASubmission Grappling, MMA
- RussiaSambo
- ChinaChin Na
Effectiveness
Extension-based arm locks hyperextend the elbow joint by straightening the arm against its natural range of motion. [1]
Lineage
Extension armlocks are fundamental to judo's juji-gatame system and BJJ's armbar family. [1]
Competition Record
Extension armlocks (juji-gatame/armbar) are one of the most commonly finished submissions in all grappling competitions. [1]
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Biomechanical Mechanism
Primary Action — Hyperextension of the elbow joint — the hips drive upward against the posterior humerus while controlling the wrist
Joints Involved — Elbow (extension beyond normal ROM), wrist (stabilized), shoulder (isolated and controlled)
Force Vector — Posterior-to-anterior force on the upper arm with fixed distal anchor at the wrist creates a lever arm across the elbow
Leverage Principle — Hips act as the fulcrum — the longer the lever (full arm extension), the less force needed to hyperextend
Position & Entry
From any grip exchange — During grip fighting, isolate the opponent's wrist with two-on-one control and apply sudden flexion or rotation
From guard (gi) — When opponent posts a hand on the mat or chest, trap the wrist and apply downward pressure for the wrist lock
From mount or side control — Opponent posts to escape, trap the wrist against the mat and apply the lock
Videos
1 video
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Ratings
Risk of injury to the person this technique is applied to
5
High5/10
Wrist extension locks force the hand backward, compressing the carpal bones and risking fracture
Skill level needed to execute this technique reliably
Advanced
Whether this technique is allowed under major competition rule sets
Illegal
— kansetsu-waza
IJF Sport and Organisation Rules 2025, Article 27PDFLegal
— IBJJF — Legal at all belt levels
IBJJF Rules Book v6.0, June 2024PDF— ADCC — Legal — all submissions legal in ADCC
ADCC Rules Update, April 2025PDF— Unified MMA — Legal submission technique
Unified Rules of MMA, August 2025PDF— FIAS Sport Sambo — Legal
FIAS International Sambo Competition RulesPDF— FIAS Combat Sambo — Legal
FIAS Combat Sambo RulesPDFTraining Notes
✓Wrist extension locks bend the hand backward — forcing the back of the hand toward the forearm beyond the wrist's natural extension range (Danaher, New Wave Jiu Jitsu, 2020)
✓The standard wrist extension: control the opponent's forearm with one hand while the other hand pushes the back of their hand toward their forearm — the wrist hyperextends
✓Extension locks are the most common wrist submissions in grappling: they appear during grip fighting, guard passing, and from mount when the opponent posts a hand
✓The extension lock is available whenever the opponent has a flat hand on the mat or against your body — the exposed fingers create the lever for the extension
✓The power comes from the attacker's body weight driving through the hand: the free hand pushes the back of the hand while body weight provides the force through the controlling arm
✓Extension locks work both in gi and no-gi: in gi, the sleeve grip assists control; in no-gi, the bare forearm is controlled directly
✓The transition from grip break to wrist lock is seamless: peeling the opponent's grip open naturally positions the hand for an extension lock
Common Mistakes
!Pushing the fingers instead of the back of the hand — the force must be applied to the metacarpals (back of hand), not the finger joints
!Not stabilising the forearm — the forearm must be anchored; if it moves with the hand, no extension occurs
!Using finger strength — the extension requires the palm of the attacker's hand against the back of the opponent's hand; full palm contact distributes force
!Applying when the opponent makes a fist — the fist position strengthens the wrist; wait for or create an open hand
!Not recognising the setup — the extension lock appears during grip breaks and hand posting; learn to see these moments
!Cranking rapidly — the wrist breaks before pain signals register; apply gradually
!Attempting from a distance — the attacker must be close enough to control both the forearm and the hand simultaneously
Related Techniques
Counter Techniques
Setup Chain
1Establish Position — achieve the controlling position needed for this submission
2Create the Threat — begin the submission setup to force a defensive reaction
3Secure the Hold — lock the submission grip with proper body mechanics
4Finish — apply increasing pressure until the opponent taps or the joint/choke takes effect
Sources & References
Primary Source
Aikido — Kote Gaeshi; Kodokan Goshin Jutsu kata
1BookAikido — Kote Gaeshi; Kodokan Goshin Jutsu kata
Japanese terminology sourced from Aikido — Kote Gaeshi; Kodokan Goshin Jutsu kata
2SyllabusAikido Terminology
Aikido technique naming conventions
Standard Japanese martial arts terminology (kanji/hiragana)
4OtherJapanese Martial Arts Standard Terminology (武道用語)
Established Japanese martial arts naming convention — native Japanese term (和語/漢語)
5CitationAikido — Kote Gaeshi; Kodokan Goshin Jutsu kata
Japanese terminology sourced from Aikido — Kote Gaeshi; Kodokan Goshin Jutsu kata
Community
Athletics
Requires
fine motor control, grip sensitivity, quick hand transitions
Favours
dexterous hands with strong fingers
Key muscles
forearm flexors and extensors, intrinsic hand muscles
Sub-techniques
Find by what a technique does — not its name
Every move, in any martial art, shares a few universal traits. Mix and match below to pinpoint the right tool — or compare equivalents across styles.
Category
Distance
Body target
Figure-Four Extension
GenusThe figure-four extension wrist lock uses a figure-four grip configuration to hyperextend the opponent's wrist — bending it backward beyond its natural range of motion. [1,2] The attacker grips the opponent's hand with one hand and reinforces with a figure-four by gripping their own wrist, then presses the back of the opponent's hand toward the forearm. [1] The figure-four provides mechanical advantage that makes the lock extremely difficult to resist with wrist strength alone. [1] This is commonly applied when the opponent grips a collar or sleeve in gi grappling. [1,2]
Explore
Gooseneck Extension
GenusThe gooseneck extension wrist lock bends the wrist backward while curling the fingers downward, creating a shape resembling a goose's neck. [1,2] The attacker grips the back of the opponent's hand and pushes it toward the forearm while simultaneously curling the fingers, compounding the extension pressure on the wrist with flexion pressure on the finger joints. [1,3] This double-action makes the gooseneck particularly painful and difficult to resist. [1] It is commonly applied from wrist control positions in standing or from top positions in ground grappling. [1,4]
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Frequently Asked Questions
How should I position my hands when applying a gooseneck wrist lock?
Your hands should be positioned absolutely vertical, like in a prayer position, with the opponent's hands held between yours. According to Weapons Defense Academy, avoid taking the hand on an angle or all the way over—keep it strictly vertical for proper technique execution.
What's the correct direction to apply pressure in a gooseneck wrist lock?
You should pull the opponent's hand toward you while pushing their fingers toward their body (toward their nose), and push downward—not upward or sideways. Weapons Defense Academy emphasizes that pushing up or to the side produces no effect; the downward pulling-and-pushing motion is what creates the lock.
How do I prevent my opponent from escaping the gooseneck wrist lock?
Don't let their elbow rise, because lifting the elbow allows them to spin and turn out of the lock. Weapons Defense Academy recommends keeping your hands over the top to control their arm and applying pain if they try to bring their hand up to escape.
How does the Extension work?
Wrist extension locks force the hand backward (dorsiflexion), hyperextending the wrist joint and stressing the palmar ligaments and flexor tendons. The gooseneck is the classic wrist extension lock — the attacker bends the opponent's hand backward toward the forearm.
Where does the Extension come from?
Wrist extension techniques (kote-gaeshi, 小手返し) are foundational in aikido and Daito-ryū Aiki-jūjutsu, where they are used for both throwing and control. In judo, wrist locks appear in the Kodokan Goshin Jutsu self-defense kata.
Is the Extension legal in competition?
IBJJF: legal — Legal at all belt levels; IJF: banned — Only elbow joint locks (kansetsu-waza) permitted in judo — all other joint lo…; ADCC: legal — Legal — all submissions legal in ADCC; Unified MMA: legal — Legal submission technique; FIAS Sport Sambo: legal — Legal; FIAS Combat Sambo: legal — Legal
How dangerous is the Extension?
Danger rating 5/10. Wrist extension locks force the hand backward, compressing the carpal bones and risking fracture
How do I set up the Extension?
The standard setup chain: Establish Position → Create the Threat → Secure the Hold → Finish.
How do I defend against the Extension?
Standard counters include: Early Recognition — identify the submission attempt early and begin defence immediately / Posture and Base — maintain strong posture and base to prevent submission setups / Grip Fight — deny the attacker their preferred gripping configuration.
What are the variants of the Extension?
Common variants: Standard wrist lock (kote gaeshi) (two-handed rotational lock on the wrist); Gooseneck wrist lock (flexion lock bending the wrist down toward the forearm); Standing wrist lock (applied during grip fighting or a standing exchange); Ground wrist lock (catching the opponent's posted hand from mount, side cont…).
How effective is the Extension in competition?
Extension armlocks (juji-gatame/armbar) are one of the most commonly finished submissions in all grappling competitions.
What are common mistakes when doing the Extension?
Top errors to watch for: Pushing the fingers instead of the back of the hand — the force must be applied to the metacarpals (back of hand), no… / Not stabilising the forearm — the forearm must be anchored; if it moves with the hand, no extension occurs / Using finger strength — the extension requires the palm of the attacker's hand against the back of the opponent's han… / Applying when the opponent makes a fist — the fist position strengthens the wrist; wait for or create an open hand.
What are other names for the Extension?
The Extension is also known as Nobashi, Wrist Extension Lock, Dorsal Flexion Lock.