Ippon-Seoi-Nage Tips | Riki Judo Dojo
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Ippon Seoi Nage·Riki Judo Dojo·Added by Admin
Riki sensei explained ippon-seoi-nage (一本背負投 - one-armed shoulder throw) during judo class on 3-31-2022. 0:00 Te-waza …
Ippon Seoi Nage
Genus一本背負い投げ(Ippon Seoi Nage)
TraditionalTranslation: one-arm shoulder throw
Overview
Ippon Seoi Nage (single-arm back-carrying throw) is the most widely practised seoi-nage variant, in which the thrower releases the lapel grip, reaches under the opponent's arm to secure it with the throwing arm, turns in, and throws the opponent over the shoulder using the trapped arm as the primary control point. [1] The 'ippon' (one-arm) designation refers to the single arm that secures the opponent's arm, distinguishing it from morote (two-handed) versions. [1],[2] The technique requires explosive rotation, a deep entry under the opponent's centre of gravity, and powerful pulling action with the sleeve hand to complete the throw. [2],[3]
History & Origin
Ippon seoi nage has been a staple of judo competition since the early Kodokan era, particularly associated with lighter-weight fighters who exploit speed and low entry to throw larger opponents. [1] The technique was a signature throw of Toshihiko Koga, whose explosive ippon seoi-nage won him the 1991 World Championship and 1992 Olympic gold medal. [2],[3]
Effectiveness
Ippon seoi nage is one of the highest-percentage throwing techniques in judo, particularly effective for lighter-weight fighters who can exploit their lower centre of gravity and speed to turn under taller opponents. [1] Inokuma and Sato describe it as the quintessential forward throw that, when executed with explosive entry and deep kuzushi, produces clean ippon even against resistant opponents. [2] The one-arm grip provides excellent control over the opponent's arm, preventing escape during the throwing arc. [3]
Lineage
Ippon seoi nage has been part of the Kodokan judo curriculum since the early 20th century, classified under te-waza (hand techniques). [1] The technique has been refined through successive generations of competitive judoka, particularly at Japanese universities where seoi nage specialisation is common. [2]
Competition Record
Ippon seoi nage is the most frequently scored forward throw at Olympic Games and World Championships in the lighter weight categories (60-73 kg). [1] Toshihiko Koga (JPN) won the 1991 World Championship and 1992 Olympic gold at 71 kg with an explosive ippon seoi nage that became one of the most famous throws in judo history. [2] Tadahiro Nomura (JPN) used ippon seoi nage as a core weapon in winning three consecutive Olympic gold medals (1996, 2000, 2004) at 60 kg. [3]
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Biomechanical Mechanism
Primary Action — Pulling and lifting with the arms to load the opponent over the shoulder or upper back
Joints Involved — Attacker's shoulders (loading point), elbows (pulling action), hips (turning under the opponent)
Force Vector — Forward and downward rotation — the pulling arm creates circular momentum while the body turns underneath
Kuzushi (Off-balancing) — Forward — breaking the opponent's balance forward over their toes allows the turning entry
Position & Entry
From collar and sleeve grip — Pull the opponent forward and up, turn in while dropping below their centre of gravity, load them onto the back/shoulder and rotate forward to throw
From sleeve grip (ippon seoi) — Secure the sleeve, step across, load the arm over the shoulder while turning, pull and throw
From underhook — Turn in with the underhook side, load the opponent over the shoulder and drive forward
Variants
Morote seoi nage — two-handed shoulder throw with both hands gripping
Ippon seoi nage — one-arm shoulder throw loading the arm over the shoulder
Drop seoi nage — dropping to the knees for a lower entry point
Korean-style shoulder throw — modified entry with deeper level change
Videos
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Ratings
Risk of injury to the person this technique is applied to
6
High6/10
Seoi-Nage family; high amplitude with rotation over tori's shoulder (Kano 1986)
Skill level needed to execute this technique reliably
Intermediate
Whether this technique is allowed under major competition rule sets
— IJF — Legal throwing technique
IJF Sport and Organisation Rules 2025, Article 27PDF— IBJJF — Legal at all belt levels
IBJJF Rules Book v6.0, June 2024PDF— UWW — Legal in both freestyle and Greco-Roman
UWW International Wrestling Rules, January 2026PDF— Unified MMA — Legal throwing technique
Unified Rules of MMA, August 2025PDF— ADCC — Legal
ADCC Rules Update, April 2025PDF— FIAS Sport Sambo — Legal
FIAS International Sambo Competition RulesPDF— FIAS Combat Sambo — Legal
FIAS Combat Sambo RulesPDFTraining Notes
✓Ippon seoi nage (one-arm shoulder throw) loads the opponent over one shoulder using the arm as the primary lever
✓Release the lapel grip and drive your arm under the opponent's armpit, locking their arm over your shoulder
✓Turn completely into the opponent, sitting your hips below their belt
✓The opponent's arm is trapped over your shoulder by your arm pressed under their armpit
✓Lift by straightening the legs and pulling forward with the trapped arm
✓Ippon seoi nage is one of the highest-scoring techniques in international judo — it produces clean ippons regularly
✓The entry must be explosive — step, turn, sit, lift in one motion
Common Mistakes
!Not driving the arm deep enough under the opponent's armpit — the arm must lock the opponent's arm over your shoulder
!Entering with hips too high — the deep hip drop is what makes the lift possible
!Not trapping the opponent's arm securely — they pull it free and you have no control
!Bending forward instead of sitting back against the opponent
!Turning too slowly, giving the opponent time to cross-face or sprawl
!Not pulling the opponent forward before entering — they lean back and resist the entry
!Releasing the sleeve grip, which eliminates the pulling mechanism for the throw
Related Techniques
Counter Techniques
Setup Chain
1Grip Setup (Kumi-kata) — establish the controlling grips needed for the throw
2Off-Balance (Kuzushi) — break the opponent's balance in the throwing direction
3Entry (Tsukuri) — position the body for the throw by turning, stepping, or loading
4Execution (Kake) — complete the throwing action with full commitment and follow-through
Sources & References
Primary Source
Kodokan Judo — Official Nage-waza Classification
1BookKodokan Judo — Official Nage-waza Classification
Traditional Judo throwing technique terminology (Kodokan Institute)
Official Kodokan ground technique classification system
Standard Japanese martial arts terminology (kanji/hiragana)
4OtherJapanese Martial Arts Standard Terminology (武道用語)
Established Japanese martial arts naming convention — native Japanese term (和語/漢語)
5CitationKodokan Judo — Official Nage-waza Classification
Traditional Judo throwing technique terminology (Kodokan Institute)
Community
Athletics
Requires
explosive turning speed, arm pulling power, deep level change
Favours
shorter stature for getting under the opponent, strong back
Key muscles
deltoids, trapezius, quadriceps, core
Notes
Ippon seoi nage appears in 25 passages across 6 books in our corpus. Toshihiko Koga's one-arm shoulder throw at the 1992 Barcelona Olympics is considered one of the greatest throws in judo history. The technique is the most commonly attempted throw variation in international judo competition. (Kano, Kodokan Judo; Black Belt magazine archives; IJF competition data)
Frequently Asked Questions
How should I pull my opponent to set up Ippon Seoi Nage?
You want to pull slightly up and forward rather than down, as pulling down forces you to get much lower under your opponent. Riki Judo Dojo emphasizes this is especially effective if you're shorter than your opponent.
Why is foot placement important in Ippon Seoi Nage?
You should step with both feet inside your opponent's stance rather than spreading your feet wide, because a wide stance allows them to piggyback you and sink your weight. Riki Judo Dojo explains that keeping your feet positioned this way maintains your strength and leverage.
How low should I get when executing Ippon Seoi Nage?
You need to bend your knees and get below your opponent's center of gravity, as the lower you go, the less of your body blocks them from rotating over your back. Keeping your heels up off the mat helps maintain this low position.
Can I throw from both sides without changing my grip?
Yes, you can execute Ippon Seoi Nage from either side with the same grip by using either an open hand or fist, allowing you to read your opponent's feet and choose your direction dynamically.
How does the Ippon Seoi Nage work?
Ippon Seoi Nage (single-arm back-carrying throw) is the most widely practised seoi-nage variant, in which the thrower releases the lapel grip, reaches under the opponent's arm to secure it with the throwing arm, turns in, and throws the opponent over the shoulder using the trapped arm as the primary control point. The 'ippon' (one-arm) designation refers to the single arm that secures the opponent's arm, distinguishing it from morote (two-handed) versions.
Where does the Ippon Seoi Nage come from?
Ippon seoi nage has been a staple of judo competition since the early Kodokan era, particularly associated with lighter-weight fighters who exploit speed and low entry to throw larger opponents. The technique was a signature throw of Toshihiko Koga, whose explosive ippon seoi-nage won him the 1991 World Championship and 1992 Olympic gold medal.
Is the Ippon Seoi Nage legal in competition?
IJF: legal — Legal throwing technique; IBJJF: legal — Legal at all belt levels; UWW: legal — Legal in both freestyle and Greco-Roman; Unified MMA: legal — Legal throwing technique; ADCC: legal — Legal; FIAS Sport Sambo: legal — Legal; FIAS Combat Sambo: legal — Legal
How dangerous is the Ippon Seoi Nage?
Danger rating 6/10. High — Seoi-Nage family; high amplitude with rotation over tori's shoulder (Kano 1986)
How do I set up the Ippon Seoi Nage?
The standard setup chain: Grip Setup (Kumi-kata) → Off-Balance (Kuzushi) → Entry (Tsukuri) → Execution (Kake).
How do I defend against the Ippon Seoi Nage?
Standard counters include: Lower Centre of Gravity — bend knees and drop hips to make the throw harder to execute / Grip Break — deny the thrower their preferred gripping configuration / Stiff-Arm — maintain distance with straight arms to prevent the entry.
What are the variants of the Ippon Seoi Nage?
Common variants: Morote seoi nage (two-handed shoulder throw with both hands gripping); Ippon seoi nage (one-arm shoulder throw loading the arm over the shoulder); Drop seoi nage (dropping to the knees for a lower entry point); Korean-style shoulder throw (modified entry with deeper level change).
How effective is the Ippon Seoi Nage in competition?
Ippon seoi nage is the most frequently scored forward throw at Olympic Games and World Championships in the lighter weight categories (60-73 kg). Toshihiko Koga (JPN) won the 1991 World Championship and 1992 Olympic gold at 71 kg with an explosive ippon seoi nage that became one of the most famous throws in judo history.
What are common mistakes when doing the Ippon Seoi Nage?
Top errors to watch for: Not driving the arm deep enough under the opponent's armpit — the arm must lock the opponent's arm over your shoulder / Entering with hips too high — the deep hip drop is what makes the lift possible / Not trapping the opponent's arm securely — they pull it free and you have no control / Bending forward instead of sitting back against the opponent.
What are other names for the Ippon Seoi Nage?
The Ippon Seoi Nage is also known as One-Arm Shoulder Throw, Single-Arm Back Carry Throw, Ippon Seoi Nage, One-Point Shoulder Throw.