The 6 Basic Movements (Kihon Dosa) of Yoshinkan Aikido
An exhaustive biomechanical guide to Yoshinkan Aikido's 6 foundational movements: Tai no Henko I & II, Hiriki no Yosei I & II, and Shumatsu Dosa I & II.
In traditional Japanese martial arts, teaching hundreds of complex techniques without a standardized movement grammar inevitably leads to technical confusion and inconsistency. To solve this problem, Master Gozo Shioda (1915–1994) distilled the entire biomechanical universe of classical Aikido into Six Basic Movements (Kihon Dosa · 基本動作).
Practiced both as solo exercises (Tandoku Dosa) and with an unyielding partner (Sotai Dosa), the 6 Kihon Dosa serve as the universal grammar of Yoshinkan Aikido. Every throw, joint lock, and pin in the 150 Kihon Waza syllabus is simply a combination of these six movement building blocks.
- The 3 Movement Pairs: Body Pivoting (Tai no Henko), Elbow Power (Hiriki no Yosei), and Finishing Movements (Shumatsu Dosa).
- Ichi (一) vs. Ni (二): Version I trains static grab leverage; Version II trains dynamic timing and momentum redirection.
- Spinal Axis Alignment: Maintains the plumb line (Seichusen) under continuous rotation and acceleration.
- Whole-Body Power: Generates concentrated power (Shuchu-ryoku) without engaging shoulder or bicep tension.
1. The Operational Modes: Ichi (Static) vs. Ni (Dynamic)
Each of the three movement pairs is divided into two distinct training modes:
Mode I (Ichi · 一) — Static Grab & Structural Leverage
Trained against a partner who holds with maximum static grip strength from a dead stop. You cannot rely on momentum or speed; you must align your skeletal frame and pivot using pure hip drive to break the partner's balance (Kuzushi).
Mode II (Ni · 二) — Dynamic Rush & Blending Timing
Trained against a partner who rushes forward with a strike, push, or dynamic grab. You step off the attack line at a 45-degree angle (Irimi), match their velocity (Awase), and lead their force in a spiral.
2. Detailed Breakdown of the 6 Kihon Dosa
1. Tai no Henko (I) · Body Pivoting from Static Hold (体の変更一)
Execution: From Kamae, the partner grips your lead wrist tightly. Without pulling back with your arm, you pivot 180 degrees on the front big toe (Oyayubi), sweeping the rear leg around in a tight arc while extending the hand sword (Tegatana) along your chest centerline. Body weight settles at roughly 60% over the new front foot.
Mechanical Outcome: Aligns your central axis with the attacker's line of power, rendering their wrist grip completely powerless and pulling their balance forward onto their toes.
2. Tai no Henko (II) · Stepping & Circular Blending (体の変更二)
Execution: As the attacker pushes or strikes forward, you take a deep 45-degree diagonal step forward with the front foot (Irimi), followed by a sweeping 180-degree hip turn. Both hands extend outward along the spiral trajectory of the attacker's forward drive.
Mechanical Outcome: Vacates the attack line while guiding the opponent's forward momentum past your center, leading directly into throws like Kokyunage and Iriminage.
3. Hiriki no Yosei (I) · Center-Line Elbow Power (肘力の養成一)
Execution: From Kamae, push forward off the rear foot while raising both arms along the chest centerline like a samurai drawing a sword. The elbows remain bent with structural rigidity (Hiriki), projecting force upward and forward through the hips.
Mechanical Outcome: The primary throwing engine of Shihonage (Four-Direction Throw) and Ikkajo Osae (First Control).
4. Hiriki no Yosei (II) · Diagonal Stepping Penetration (肘力の養成二)
Execution: Step diagonally forward with the rear leg while extending the lead forearm directly across the opponent's chest or throat line, unbalancing their cervical spine while maintaining an erect posture.
Mechanical Outcome: Establishes dominant inside leverage and breaks the opponent's posture before they can counter with strikes.
5. Shumatsu Dosa (I) · Linear Push & Reset (終末動作一)
Execution: A deep forward push driving with the hips, followed by an immediate 180-degree pivot and settling back into grounded Kamae.
Mechanical Outcome: Concludes throwing techniques by driving the attacker to the tatami while maintaining the practitioner's balance and stability.
6. Shumatsu Dosa (II) · Circular Sweep & Environmental Vigilance (終末動作二)
Execution: A continuous rotating entry that harmonizes with retreating or flanking attackers, settling into low, anchored Kamae with full 360-degree awareness (Zanshin).
Mechanical Outcome: Prepares the practitioner for multiple attackers (Taninzu-gake) by eliminating post-technique vulnerability.
Hiriki no Yosei — the elbow-power engine behind Shihonage and Ikkajo — demonstrated by Renshinkai, the dojo of former Yoshinkan Honbu chief instructor Tsutomu Chida.
3. Technique Mapping Matrix: How Kihon Dosa Builds the Syllabus
| Kihon Dosa Movement | Core Biomechanical Engine | Primary Applied Techniques |
|---|---|---|
| Tai no Henko (I) | Static center-line pivot; grip nullification; rear leg weight transfer. | Katatetori Ikkajo (I), Nikajo (I), Sankajo (I), Kotegaeshi (I). |
| Tai no Henko (II) | 45° diagonal entry (Irimi); momentum spiral redirection. | Katatetori Ikkajo (II), Shihonage (II), Kokyunage, Sokumen Iriminage. |
| Hiriki no Yosei (I) | Upward center-line sword raise; whole-body hip drive. | Shihonage (I), Ikkajo Osae (I), Hijishime (I). |
| Hiriki no Yosei (II) | Diagonal chest entry; cervical spine unbalancing. | Shomenuchi Ikkajo (II), Shomenuchi Iriminage (II), Hijishime (II). |
| Shumatsu Dosa (I) | Linear hip-powered sword cut and 180° posture stabilization. | Finishing throws for Shihonage (I), Kotegaeshi (I), Tenchinage. |
| Shumatsu Dosa (II) | Continuous circular redirection and low-center anchoring. | Finishing throws for Shihonage (II), Iriminage (II), Jiyu-waza flow. |
4. The Footwork Engine: Ayumi Ashi vs. Tsugi Ashi
The 6 Kihon Dosa are powered by two distinct classical footwork modalities that allow the practitioner to traverse distance without ever breaking their central stance:
1. Ayumi Ashi (歩み足 · Stepping Cross-Step)
The rear foot glides past the front foot in a smooth, continuous stride while the hips remain level. Used for entering deep into an opponent's blind flank (Irimi) during large throws like Iriminage.
2. Tsugi Ashi (継ぎ足 · Gliding Follow-Step)
The lead foot slides forward, and the rear foot immediately draws up to maintain the exact 60:40 triangular distance in Kamae. Used for micro-adjusting distance (Ma-ai) and applying decisive pins.
5. Skill Progression Ladder: Bronze, Silver & Gold Exit Criteria
In Yoshinkan training, mastery of each Kihon Dosa is evaluated against three objective performance benchmarks:
- Bronze Standard: Executes the movement sequence correctly when given verbal counts ("Ichi! Ni!") with minor stance adjustments needed.
- Silver Standard: Performs the movement flawlessly without instructor prompts, maintaining unbroken vertical alignment (Seichusen) and proper toe coordinates.
- Gold Standard: Demonstrates the movement under dynamic partner resistance, effortlessly channeling centered power (Chushin-ryoku) to unbalance an uncooperative partner.
Master the Basics at Shoreikan Dojo
At Shoreikan Dojo in Kepong, Kuala Lumpur, Chief Instructor Tony Chung (6th Dan) guides students through rigorous, daily Kihon Dosa practice. Whether you are a total beginner or an experienced martial artist, mastering these six movements unlocks effortless power, balance, and martial precision. Explore our Adult & Children Aikido Classes.
Canonical Literature & References
- Shioda, Gozo. (1996). Total Aikido: The Master Course. Kodansha International.
- Shioda, Gozo. (1968). Dynamic Aikido. Kodansha International.
- Shioda, Gozo. (2002). Aikido Shugyo: Harmony in Confrontation. Shindokan Books.
- Twigger, Robert. (1997). Angry White Pyjamas: An Oxford Poet Trains with the Tokyo Riot Police. William Morrow.
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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