水平鉄槌打ち（基本型）(Suihei Tettsui-uchi (Kihon-gata))
TraditionalTranslation: standard horizontal hammer fist
The standard horizontal hammer fist is the basic lateral hammering strike targeting the side of the opponent's head. [1] Nakayama described yoko tetsui uchi as a technique requiring full hip rotation to generate power through the horizontal arc. [2] In modern self-defence systems such as Krav Maga and combatives, the horizontal hammer fist is taught as a preferred striking method for untrained individuals because it minimises the risk of hand injury compared to a closed-fist hook. [1]
Standard horizontal hammer fist. [1]
From MMA. [1]
Used in MMA. [1]
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In this Student Section video we go over how to Escape from the Guard - Sit Back and Strike the Groin (Level 2 technique…
Going over why so many sayings about straight vs curved punches are untrue in real-world combat and why! Are straight pu…
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The provided transcripts do not contain substantive instructional content on the standard horizontal hammer fist technique. Krav Maga Worldwide's video focuses on guard escapes involving collar ties and overhooks, addressing positional control and pummeling mechanics rather than hammer fist striking. Expert Boxing's Q&A examines straight versus hook punches in boxing, discussing speed, reach, and safety profiles—topics orthogonal to hammer fist pedagogy. Dom Wolf's video is presented entirely in a foreign language with no English transcription, rendering it inaccessible for synthesis. None of the three instructors directly teach, demonstrate, or reference the horizontal hammer fist strike, its mechanics, biomechanics, target applications, or defensive considerations. Consequently, no collective pedagogical synthesis can be constructed from these sources.
Synthesized from 3 instructors
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Risk of injury to the person this technique is applied to
Fleshy fist edge strike; common in ground-and-pound
Skill level needed to execute this technique reliably
Whether this technique is allowed under major competition rule sets
Karate-Do Kyohan: The Master Text (Gichin Funakoshi, 1935)
Alias sources — [1] Karate-Do Kyohan (Funakoshi, 1935) [2] Dynamic Karate (Nakayama, 1966) [3] Kukkiwon Taekwondo Textbook (Kukkiwon, 2006)
History sources — [1] The Art of Striking (Blauer, 2004) [2] Best Karate Vol. 3 (Nakayama, 1978)
Official karate technique names (和語/漢語)
Established Japanese martial arts naming convention — native Japanese term (和語/漢語)
Alias sources — [1] Karate-Do Kyohan (Funakoshi, 1935) [2] Dynamic Karate (Nakayama, 1966) [3] Kukkiwon Taekwondo Textbook (Kukkiwon, 2006)
History sources — [1] The Art of Striking (Blauer, 2004) [2] Best Karate Vol. 3 (Nakayama, 1978)
hand speed, hip rotation, wrist alignment on impact
proportional reach, strong wrists, fast-twitch shoulder muscles
deltoids, pectorals, triceps, core rotators, forearms
According to Krav Maga Worldwide, the priority is to get your arm free first. You can pummel out by drawing a circle with your hand, or as a backup plan, grab any fingertip of their grip, peel it back, and escape. Once your arm is free, you can sit back and strike to complete the escape.
Krav Maga Worldwide emphasizes that prevention is ideal: use proper basic positioning, control the biceps, and maintain positioning so your opponent cannot pull your head down and control you in the first place.
The fundamental horizontal hammer fist swinging the bottom of the fist in a lateral arc at head level, using torso rotation to drive the ulnar side of the fist into the target.
The standard horizontal hammer fist is the basic lateral hammering strike targeting the side of the opponent's head. Nakayama described yoko tetsui uchi as a technique requiring full hip rotation to generate power through the horizontal arc.
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
Danger rating 5/10. High — fleshy fist edge strike; common in ground-and-pound
The standard setup chain: Assume Fighting Stance → Generate Power → Execute Strike → Recover to Guard.
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.
Common variants: Overhead hammer fist (bringing the fist straight down onto the target from above); Side hammer fist (swinging horizontally using the bottom of the fist); Ground-and-pound hammer fist (delivered from mount or top position on the ground).
Used in MMA.
Top errors to watch for: Flattening the fist so the palm side hits instead of the bottom / Swinging from the elbow only without hip rotation / Arcing too wide and telegraphing the strike / Not returning to guard after the strike.
The Standard Horizontal Hammer Fist is also known as Suihei Tettsui-uchi (Kihon-gata), Standard Tetsui Yoko Uchi, Standard Side Hammer, Mejumeok Yop Chigi.
