Iriminage & Kotegaeshi: Yoshinkan's Two Pillar Throws
An in-depth biomechanical guide to Aikido's most famous throwing techniques: Iriminage (Entering Body Throw) and Kotegaeshi (Wrist Reverse Throw).
If Shihonage represents the pure sword-cutting mechanics of Japanese Budo, then Iriminage (入り身投げ · Entering Body Throw) and Kotegaeshi (小手返し · Forearm / Wrist Reverse Throw) represent the pinnacle of centrifugal redirection and dynamic balance disruption in Yoshinkan Aikido.
Both techniques are foundational milestones across the Kyu and Dan grading syllabus. More importantly, both throws are engineered for high-speed street self-defense against aggressive strikes and grabs, preserving the defender's standing mobility while sending the assailant forcefully to the tatami.
- Iriminage (The Decades-Deep Technique): Entering deep into Uke's blind spot and redirecting their cervical spine through hip pivoting.
- Kotegaeshi (Wrist Reversal): Capturing the wrist in outward rotation, forcing Uke to flip or face joint collapse.
- Effortless Physics: Both throws harness Uke's incoming velocity combined with Shite's hip rotation (Tai no Henko).
- Multiple Attacker Safety: Keeps Shite upright and ready to confront multiple attackers (Taninzu-gake).
1. Iriminage (入り身投げ · The Entering Body Throw)
Iriminage has a well-earned reputation among practitioners as a technique that takes years of daily practice to refine. In Yoshinkan Aikido, Master Gozo Shioda systematized Iriminage into reproducible biomechanical steps:
Phase 1: 45° Diagonal Entry (Irimi) & Blind Spot Capture
As Uke strikes with a downward strike (Shomenuchi) or straight punch (Tsuki), Shite steps 45 degrees forward into Uke's dead flank (Shikaku), matching their forward velocity (Awase). This positions Shite directly behind Uke's lead shoulder where Uke cannot punch or kick.
Phase 2: Cervical Spine Control & The Centrifugal Whirlpool
Shite guides Uke's head gently along their own chest, drawing Uke's balance into a circular whirlpool. Shite's arm wraps behind Uke's neck without squeezing or pulling with bicep strength. As Shite pivots 180 degrees via Tai no Henko (I), Uke's cervical spine is extended, completely breaking their balance.
Phase 3: Downward Center-Line Projection (Shumatsu Dosa Cut)
Shite slides their rear foot forward and cuts downward with their lead hand sword (Tegatana), dropping their center of gravity in Kamae. Uke's balance is projected backward in a wide, sweeping arc, forcing a high dynamic fall (Ushiro Ukemi).
2. Kotegaeshi (小手返し · The Wrist Reverse Throw)
Kotegaeshi is one of the most practical self-defense techniques in classical Japanese Jujutsu. When applied correctly, it leaves the attacker with no choice but to take a rolling fall or suffer wrist dislocation:
Phase 1: Off-Line Redirection & Atemi
From a wrist grab or punch, Shite delivers a sharp preemptive strike (Atemi) to Uke's face while pivoting 180 degrees via Tai no Henko (I). This unbalances Uke and draws their arm straight along Shite's chest.
Phase 2: Thumb-to-Back-of-Hand Grip
Shite places their thumb on the back of Uke's hand between the ring and little finger knuckles, wrapping their fingers around Uke's thumb pad. This creates a secure, two-point mechanical clamp on the carpal bones.
Phase 3: Rotational Hip Snap & Follow-Up Pin
Shite draws both elbows into their own centerline and snaps their hips in Shumatsu Dosa (I). The outward wrist torque sends Uke airborne into a dynamic breakfall (Yoko Ukemi). Shite immediately drops their knee beside Uke's shoulder, applying a decisive wrist lock on the ground.
Step-by-step breakdown of Shomen Uchi Iriminage Ichi — the entering throw detailed in section 1.
3. Comparison: Iriminage vs. Kotegaeshi
| Feature | Iriminage (入り身投げ) | Kotegaeshi (小手返し) |
|---|---|---|
| Primary Fulcrum | Cervical Spine & Shoulder Girdle | Carpal Joint (Wrist) & Pronation |
| Kinetic Vector | Centrifugal spiral leading into downward vertical cut | Outward rotational torque & hip snap |
| Key Kihon Dosa | Tai no Henko (I & II) | Shumatsu Dosa (I & II) |
| Required Ukemi | Ushiro Ukemi (Backward rolling breakfall) | Yoko Ukemi (Side fall) or Tobi Ukemi (High flip) |
4. Tactical Application in Multiple Attacker Scenarios (Taninzu-gake)
Both Iriminage and Kotegaeshi are celebrated for their unmatched utility in multiple attacker defense (Taninzu-gake). Because neither technique requires going to the ground or entangling limbs, Shite can project the first attacker directly into the path of incoming secondary attackers, using the first opponent's body as a physical shield while maintaining 360-degree environmental awareness (Zanshin).
Master Throws at Shoreikan Dojo in Kepong
At Shoreikan Dojo in Kepong, Kuala Lumpur, Chief Instructor Tony Chung (6th Dan) guides students through the exact biomechanics of Iriminage and Kotegaeshi. Learn to execute powerful throws with zero physical strain. Discover our Adult Class Timetable.
Canonical Literature & References
- Shioda, Gozo. (1996). Total Aikido: The Master Course. Kodansha International.
- Shioda, Gozo. (1968). Dynamic Aikido. Kodansha International.
- Twigger, Robert. (1997). Angry White Pyjamas: An Oxford Poet Trains with the Tokyo Riot Police. William Morrow.
5. Common Biomechanical Faults & Corrections
| Technique | Common Mistake | Mechanical Consequence | Yoshinkan Correction |
|---|---|---|---|
| Iriminage | Pulling Uke's neck with bicep strength | Uke resists, stiffens, and counters with a close-range knee strike. | Relax shoulders; lead Uke's center along your chest using 180° hip turn (Tai no Henko I). |
| Kotegaeshi | Twisting the wrist outside your shoulder line | Loss of central axis (Seichusen); Uke pulls Shite off balance. | Draw both elbows into your own centerline; project through pelvic snap in Shumatsu Dosa (I). |
About the Author & Reviewer
Ben Ong
AuthorStudent & Yoshinkan Practitioner
Student and Yoshinkan Aikido practitioner at Shoreikan Dojo, documenting classical techniques, biomechanics, and martial principles.
Tony Chung
Reviewer6th Dan Chief Instructor · Co-Founder
Authentic Yoshinkan instruction in Malaysia since 2001, maintaining direct technical syllabus standards from Tokyo Honbu.
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