The Knife Hand Strike
0
Knife Hand Strike·The Self Defense Company Santa Clarita
Demonstration of the edge of hand blow in Combatives!
Knife Hand Strike
Family手刀打ち(Shutō-uchi)
TraditionalTranslation: knife hand strike
Overview
History & Origin
The knife hand strike is one of the most iconic techniques in Asian martial arts, using the outer edge of the open hand as a cutting weapon. [1] In Okinawan karate, the knife hand (shuto) was documented as early as the 19th century in the kata brought from China and refined on Okinawa. [2] Funakoshi codified shuto uchi (knife hand strike) and shuto uke (knife hand block) as fundamental techniques in his 1935 Karate-Do Kyohan, establishing them as core Shotokan curriculum. [2] The knife hand became one of the most recognisable martial arts techniques in global popular culture through its use in films and its association with board-breaking demonstrations. [1] In Chinese martial arts, equivalent techniques appear as 'pi zhang' (splitting palm) in various kung fu systems. [3]
Effectiveness
Lineage
The knife hand (shuto) is a fundamental karate technique. [1]
Competition Record
Used in karate competition and MMA. [1]
Images
No images yet for this technique.
Sign in to suggest an image.
Biomechanical Mechanism
Primary Action — Striking with the heel of the palm — transfers force similar to a punch while reducing risk of hand fracture
Joints Involved — Wrist (extended, locked), shoulder (flexion/rotation), hips (rotation for power)
Force Vector — Linear or circular — same trajectory as equivalent punch but with palm contact
Safety Advantage — The palm heel absorbs impact across a larger area — lower risk of metacarpal fracture compared to closed-fist strikes
Position & Entry
From fighting stance — Extend the arm with fingers together, strike with the blade edge (ulnar side) of the open hand in a chopping arc
From close range — Short knife-hand strike to the neck, temple, or collarbone
Videos
1 video
Learn This Technique
No instructional courses yet for this technique.
Sign in to suggest a course.
Ratings
Risk of injury to the person this technique is applied to
5
High5/10
Shuto/karate chop; targets neck, collarbone, temple
Skill level needed to execute this technique reliably
Intermediate
Whether this technique is allowed under major competition rule sets
Illegal
WBC/Boxing — Only closed-fist punches permitted {src— WBC Rules of Boxing}
Kyokushin — Only closed-fist strikes to body permitted {src— IKO Kyokushin Tournament Rules}
— WT — Prohibited
WT Competition Rules 2024PDF— WAKO — Closed fist only
WAKO Competition RulesPDFK-1/GLORY — Closed fist only {src— K-1/GLORY Kickboxing Rules}
Restricted
— WKF — Varies by technique — some open-hand strikes legal ...
WKF Competition Rules 2024PDF— ITF — Some knife hand techniques legal
ITF Competition RulesPDFLegal
— palm strikes, slaps permitted
Unified Rules of MMA, August 2025PDF— IFMA — Legal — palm strikes permitted in Muay Thai
IFMA Muay Thai RulesPDFTraining Notes
✓The knife hand strike uses the outer edge of the open hand — from the base of the little finger to the wrist — as the impact surface
✓Keep the fingers pressed together firmly, with the thumb tucked against the palm for rigidity
✓The knife hand can be delivered in multiple trajectories: horizontal, diagonal, downward, or reverse (inside)
✓In karate, the knife hand (shuto) is one of the most important techniques, trained extensively in kata and kumite
✓The knife hand strike targets soft tissue: the neck, temple, throat, or bridge of the nose
✓The edge of the hand concentrates force along a narrow line, similar to the blade of a knife
✓Condition the striking edge by gradually increasing impact force on makiwara or heavy bag
Common Mistakes
!Spreading the fingers during the strike, which weakens the hand structure and risks finger injury
!Striking with the fingers instead of the edge of the hand
!Using a loose, floppy wrist — the wrist must be locked and the hand rigid
!Aiming at hard targets like the forehead or skull where the hand will be damaged
!Over-extending and reaching past effective range
!Not conditioning the striking edge and injuring the hand on impact
!Telegraphing the open-hand position before striking — the hand can be opened from a fist at the last moment
Related Techniques
Counter Techniques
Setup Chain
1Assume Fighting Stance — begin from a balanced position with guard up
2Generate Power — use hip rotation and weight transfer for maximum force
3Execute Strike — deliver the technique to the target with correct form
4Recover to Guard — return immediately to defensive position
Sources & References
Primary Source
Karate-Do Kyohan: The Master Text (Gichin Funakoshi, 1935)
1BookBoxing (Dempsey, 1950)
Alias sources — [1] Karate-Do Kyohan (Funakoshi, 1935) [2] Karate-Do Kyohan (Funakoshi, 1935) [3] Karate-Do Kyohan (Funakoshi, 1935) [4] Karate-Do Kyohan (Funakoshi, 1935)
2BookMuay Thai: The Art of Fighting (Kraitus, 2002)
History sources — [1] The Art of Striking (Blauer, 2004) [2] Karate-Do Kyohan (Funakoshi, 1935) [3] Best Karate Vol. 3 (Nakayama, 1978)
Official karate technique names (和語/漢語)
4OtherJapanese Martial Arts Standard Terminology (武道用語)
Established Japanese martial arts naming convention — native Japanese term (和語/漢語)
5CitationBoxing (Dempsey, 1950)
Alias sources — [1] Karate-Do Kyohan (Funakoshi, 1935) [2] Karate-Do Kyohan (Funakoshi, 1935) [3] Karate-Do Kyohan (Funakoshi, 1935) [4] Karate-Do Kyohan (Funakoshi, 1935)
6CitationMuay Thai: The Art of Fighting (Kraitus, 2002)
History sources — [1] The Art of Striking (Blauer, 2004) [2] Karate-Do Kyohan (Funakoshi, 1935) [3] Best Karate Vol. 3 (Nakayama, 1978)
Community
Athletics
Requires
speed, power generation through kinetic chain, striking surface conditioning
Favours
athletic build with fast-twitch muscle fibres
Key muscles
varies by strike — hip rotators, shoulders, core
Sub-techniques
Haito Uchi
SubFamilyA knife hand strike using the inner edge (thumb side) of the open hand, the reverse of shuto uchi, targeting the temple or jaw in an inward chopping motion.
1 genera·1 techniquesExplore
Shuto Uchi
SubFamilyA knife hand strike using the outer edge (pinky side) of the open hand, delivered in a chopping motion targeting the neck, collarbone, or temple.
1 genera·1 techniquesExplore
Notes
Knife hand (shuto/sudo) appears in 918 passages across 84 books — one of the most documented open-hand techniques. The edge of the hand strikes like a blade. In karate, the shuto uchi is a foundational open-hand technique. (84 books; Nakayama, Dynamic Karate; Funakoshi, Karate-Do Kyohan)
Frequently Asked Questions
What part of the hand do I use for a knife hand strike?
You use the fleshy base of the hand, the edge from the base up to below the fingertips. According to Ervin Burton of The Self Defense Company Santa Clarita, this area works well in self defense because it's a great gross motor movement that you can execute even if you're disoriented or under stress.
Where should I aim with a knife hand strike?
Aim for the side of the neck as your primary target. Ervin Burton notes that even if you miss and hit the forehead or other areas, you won't cause significant harm, making this a reliable target in self defense situations.
What are the different ways to throw a knife hand strike?
There are two main directions: horizontal (across the throat from the shoulder) and vertical (down the centerline, targeting the collarbone). According to Ervin Burton, you can also vary the angle of approach, especially if your opponent drops their chin or anticipates the strike.
How does the Knife Hand Strike work?
A strike delivered with the edge of the open hand, using the area between the base of the little finger and the wrist to chop into the target.
Where does the Knife Hand Strike come from?
The knife hand strike is one of the most iconic techniques in Asian martial arts, using the outer edge of the open hand as a cutting weapon. In Okinawan karate, the knife hand (shuto) was documented as early as the 19th century in the kata brought from China and refined on Okinawa.
Is the Knife Hand Strike legal in competition?
Unified MMA: legal — Legal (palm strikes, slaps permitted); WBC/Boxing: banned — Only closed-fist punches permitted; WKF: restricted — Varies by technique — some open-hand strikes legal in kata, generally restric…; Kyokushin: banned — Only closed-fist strikes to body permitted; WT: banned — Prohibited; ITF: restricted — Some knife hand techniques legal; WAKO: banned — Closed fist only; K: banned — 1/GLORY — Closed fist only; IFMA: legal — Legal — palm strikes permitted in Muay Thai
How dangerous is the Knife Hand Strike?
Danger rating 5/10. High — shuto/karate chop; targets neck, collarbone, temple
How do I set up the Knife Hand Strike?
The standard setup chain: Assume Fighting Stance → Generate Power → Execute Strike → Recover to Guard.
How do I defend against the Knife Hand Strike?
Standard counters include: Block — absorb the strike with a protective guard position / Evasion — move the target out of the strike's path / Counter-Attack — time an offensive response during the recovery phase of the strike.
What are the variants of the Knife Hand Strike?
Common variants: Standard variation (primary execution of the strike from the most common stance); Power variation (modified mechanics for maximum force generation); Speed variation (minimised telegraph for a faster, harder-to-read attack); Counter variation (timed to exploit the opponent's offensive commitment).
How effective is the Knife Hand Strike in competition?
Used in karate competition and MMA.
What are common mistakes when doing the Knife Hand Strike?
Top errors to watch for: Spreading the fingers during the strike, which weakens the hand structure and risks finger injury / Striking with the fingers instead of the edge of the hand / Using a loose, floppy wrist — the wrist must be locked and the hand rigid / Aiming at hard targets like the forehead or skull where the hand will be damaged.
What are other names for the Knife Hand Strike?
The Knife Hand Strike is also known as Shutō-uchi, Shuto, Karate Chop, Sudo, Knife Edge.