Hangetsu/Seisan: Haito-Uchi & Shuto-Uke/Uchi
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Standard Haito Uchi·Somerset Applied Karate·Added by Admin
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Standard Haito Uchi
Genus背刀打ち（基本型）(Haitō-uchi (Kihon-gata))
TraditionalTranslation: standard ridge hand strike
Overview
History & Origin
The standard Haito Uchi is the basic execution of the reverse knife hand strike, where the thumb-side edge of the open hand strikes the opponent's temple or jaw in a circular arc. [1] Nakayama described the correct formation as requiring the thumb to be tightly pressed against the index finger to create a rigid striking surface along the radial edge. [2] The standard version is typically delivered with an inward sweeping motion, generating power through hip rotation and arm extension. [2] This technique has been part of the Shotokan karate curriculum since Funakoshi's codification of the art in the 1930s. [1]
Effectiveness
Standard haito uchi. [1]
Lineage
From karate. [1]
Competition Record
Used in karate. [1]
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Biomechanical Mechanism
Primary Action — Generating and transferring kinetic energy from the body into the target through a striking surface
Joints Involved — Varies by technique — typically hip rotation, shoulder or hip flexion, and distal limb extension
Force Vector — Direction determined by the specific technique — linear, circular, or diagonal trajectory
Kinetic Chain — Ground reaction force transfers through the body's kinetic chain — each segment accelerates the striking limb
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
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
Videos
1 video
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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
✓From guard, swing the open hand in an inward circular arc, striking the temple with the inner ridge of the hand
✓The thumb is tucked tightly and the fingers are pressed together
✓Rotate the hips and shoulders to drive the arc, just as you would for a hook punch
✓Contact the target with the base of the index finger and the ridge of the hand
✓The arm stays at approximately 90 degrees during the arc — it is not a wide, straight-arm swing
✓Snap the hand back to guard after impact — the retraction prevents the opponent from grabbing the arm
✓In kata practice, haito uchi is often combined with a step to the side, attacking from an angle
Common Mistakes
!Not tucking the thumb — it catches on the target and hyperextends
!Hitting flat with the palm instead of the ridge edge
!Arm-punching without hip rotation
!Opening the arc too wide and losing speed and accuracy
!Not retracting to guard after the strike
!Aiming at the forehead where the skull is too hard for the hand
!Using the haito uchi in full-contact sparring without sufficient hand conditioning
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] Dynamic Karate (Nakayama, 1966) [2] Karate-Do Kyohan (Funakoshi, 1935) [3] Kukkiwon Taekwondo Textbook (Kukkiwon, 2006)
2BookMuay Thai: The Art of Fighting (Kraitus, 2002)
History sources — [1] Karate-Do Kyohan (Funakoshi, 1935) [2] 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] Dynamic Karate (Nakayama, 1966) [2] Karate-Do Kyohan (Funakoshi, 1935) [3] Kukkiwon Taekwondo Textbook (Kukkiwon, 2006)
6CitationMuay Thai: The Art of Fighting (Kraitus, 2002)
History sources — [1] Karate-Do Kyohan (Funakoshi, 1935) [2] 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
Frequently Asked Questions
What is the main principle behind Haito Uchi, and does it need to look exactly like the form?
According to Somerset Applied Karate, the principle of Haito Uchi is generic and can be applied in multiple ways—it doesn't need to look exactly like the kata form to be effective. Whether you execute it as a single striking motion or as two separate movements, the underlying principle remains useful and valid.
How should I respond when an opponent's strike is coming in?
Somerset Applied Karate teaches that you can parry or redirect the incoming strike, then drive it downward while simultaneously moving out of the way and striking. This allows you to use the opponent's force to your advantage while creating an opening for your own technique.
Where should I aim with Haito Uchi in a practical application?
Somerset Applied Karate suggests targeting the neck as a vulnerable point, which opens multiple follow-up options such as control, a guillotine, or other techniques—much like animals in the kingdom naturally target the neck when fighting.
Can I use either hand to perform Haito Uchi responsively?
Yes, according to Somerset Applied Karate, if you make the first movement of Haito Uchi more responsive, it can work with either hand regardless of which hand your opponent attacks with, allowing you to adapt fluidly to the incoming strike.
How does the Standard Haito Uchi work?
The fundamental ridge hand strike using the inner edge of the hand near the base of the index finger, swinging inward to strike the temple, jaw, or neck.
Where does the Standard Haito Uchi come from?
The standard Haito Uchi is the basic execution of the reverse knife hand strike, where the thumb-side edge of the open hand strikes the opponent's temple or jaw in a circular arc. Nakayama described the correct formation as requiring the thumb to be tightly pressed against the index finger to create a rigid striking surface along the radial edge.
Is the Standard Haito Uchi 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 Standard Haito Uchi?
Danger rating 5/10. High — shuto/karate chop; targets neck, collarbone, temple
How do I set up the Standard Haito Uchi?
The standard setup chain: Assume Fighting Stance → Generate Power → Execute Strike → Recover to Guard.
How do I defend against the Standard Haito Uchi?
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 Standard Haito Uchi?
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 Standard Haito Uchi in competition?
Used in karate.
What are common mistakes when doing the Standard Haito Uchi?
Top errors to watch for: Not tucking the thumb — it catches on the target and hyperextends / Hitting flat with the palm instead of the ridge edge / Arm-punching without hip rotation / Opening the arc too wide and losing speed and accuracy.
What are other names for the Standard Haito Uchi?
The Standard Haito Uchi is also known as Haitō-uchi (Kihon-gata), Standard Ridge Hand, Standard Inside Knife Hand, Standard Sonnal Deung.