01 / AT A GLANCE
What makes ippon-seoi-nage different?
Ippon-seoi-nage is the one-armed shoulder throw in the Kodokan’s te-waza group. You control one of uke’s arms as you turn underneath it, connect your back to their upper body and throw over the shoulder. “One-armed” describes the shoulder-side action; it does not mean that your other hand becomes unimportant. The sleeve hand is central to bringing uke into the turn and controlling the finish.
Right-sided convention: you are tori, the thrower. Your left hand controls uke’s right sleeve. Your right arm passes beneath uke’s right armpit and folds around the upper arm, with a grip near the upper sleeve or shoulder in the official example. Uke is your partner. Mirror the entire relationship for a left-sided throw; do not simply change the first footstep.
This guide concentrates on a standing entry. Read seoi-otoshi for the dropping action and seoi-nage for the familiar two-handed sleeve-and-lapel form. The three names should not be collapsed into one generic “seoi” page. They pose different grip and support problems even when the entry looks similar at speed.
Use the article after a supervised lesson and established ukemi practice. A beginner can identify the parts of the throw; an experienced judoka can diagnose a separation or timing problem. Neither height nor belt colour alone tells you whether this should become your main attack.
02 / WATCH THE TECHNIQUE
Watch the arm connection before the finish
Open this video on YouTube if the player is unavailable.
Open this video on YouTube if the player is unavailable.
The Kodokan demonstration supplies the reference action. The Efficient Judo clip is a second demonstration, not a spoken explanation of every detail. Compare the two at ordinary speed before pausing. A still image of the final position cannot show whether the sleeve and turn arrived together.
First viewing: follow only uke’s right elbow. Does it travel with tori’s turn, or appear to remain behind? Second viewing: follow tori’s back and the space beneath uke’s armpit. Third viewing: look at the support feet and the direction in which uke leaves the shoulder. These are questions to inspect, not claims that a single camera angle makes every contact visible.
For a specific entry sequence, use Efficient Judo’s ko-uchi-gari to ippon-seoi-nage demonstration. Identify the foot attack and uke’s recovery separately. The lesson to investigate is the change of direction; do not infer that every ko-uchi attempt automatically creates a shoulder throw.
When comparing with your own video, choose a clip with the same sleeve relationship. A collar-side or cross-grip variation may solve a different problem. If the elbow is hidden by the judogi, mark the connection as unknown instead of diagnosing it from the landing alone.
03 / WHEN TO USE IT
Find a sleeve you can bring through the turn
A useful opportunity combines access to uke’s right arm, a manageable distance and movement you can turn forward. You may have a conventional sleeve-and-lapel grip before releasing the lapel to enter. The release is a commitment: if the sleeve is weak and uke is still balanced, abandoning the lapel can remove your best remaining control.
Same-sided and opposite-sided grips
In right-versus-right practice, begin from the sleeve relationship used in your lesson and distinguish a relaxed moving arm from a rigid barrier. Move uke before trying to fit underneath. In right-versus-left practice, the lead arms and reachable sleeve change. Practise securing the intended arm and finding the turning lane first. Do not twist yourself beneath whichever elbow happens to be nearest.
Advancing, retreating and crowding
An advancing uke can bring their shoulder into range, but a late entry may become cramped. A retreating uke may leave you reaching with the sleeve while your feet turn on the spot. A partner already pressed against you may leave too little room to fold the right arm comfortably. These are different distance problems, not evidence that the throw needs more speed in every situation.
Set up an entry drill in which uke takes one predictable step. Decide whether the sleeve and shoulder arrive within reach before you turn. Once that is reliable, let uke occasionally retreat farther. Choosing to rebuild the grip on those repetitions is part of learning the attack, not a failed repetition.
04 / HOW IT WORKS
Carry uke with the turn
1. Establish the sleeve path
Use the left hand to invite uke forward and toward the chosen front corner. Avoid treating this as a separate maximum-strength pull followed by a pause. If uke recovers while you prepare the feet, the later turn starts from a new situation. Your coach should be able to identify a continuous relationship between the sleeve movement and entry.
2. Enter beneath the upper arm
Turn left for the right-sided throw while bringing your right arm beneath uke’s right armpit. The bent arm creates close contact around the upper arm. Keep the action comfortable for both partners; a shoulder throw should not depend on forcing uke’s elbow into an abnormal position. If the arm is too low or slipping, reset the grip and distance.
3. Bring the back into the connection
Continue the feet and body together so uke meets your back rather than watching you rotate at arm’s length. Bend through the legs sufficiently for the coached fit without collapsing your chest. There is no universal foot spacing that works for all partners. A useful check is whether the position carries uke’s balance or requires a separate heave after the entry.
4. Project, then support the landing
Coordinate the continuing hand action, body turn and leg contribution to send uke over the right shoulder. Do not finish by abruptly folding your head toward the mat or wrenching the trapped arm. Maintain appropriate sleeve control for uke’s breakfall. Begin with a coach supervising the landing direction and finish before adding movement or resistance.
The phases are teaching checkpoints, not four stops to reproduce in randori. Smoothness means the connection survives between them; it does not mean rushing past a missing grip.
05 / KEY POINTS
Five cues you can actually check
- Bring the elbow with you. Ask a partner or coach whether uke’s right elbow follows the entry. If your back turns while that elbow stays behind, inspect the sleeve connection before changing your feet.
- Fit beneath the arm; do not trap it painfully. Uke should be able to report pressure without joint pain. Stop and adjust if the connection feels like an arm lock rather than a throwing fit.
- Close the gap with your body. Check whether you need an extra backward shuffle after turning. That extra movement may reveal an entry made too far away.
- Stay organised through the legs. In a slow entry without a throw, you should be able to return to stance without falling forward. A balanced fit gives you more options than a desperate dive.
- Keep the sleeve working into the finish. Film the final part of a supervised nage-komi. Notice whether the left hand stops as the right shoulder turns; ask your coach to evaluate the landing control as well as the throw.
Choose one cue for a short practice block. Trying to fix five parts on every repetition makes it difficult to know which change helped. If a cue makes your movement stiff or creates discomfort, describe that result to your coach instead of forcing the wording to work.
06 / PROBLEMS & ADJUSTMENTS
When the entry stalls, locate the first separation
You turn, but uke stays standing behind you
Possible causes include a slack sleeve, an entry beyond useful range or a turn made after uke has already recovered. Start with an easy moving entry and pause before the throw. Ask whether uke’s shoulder has travelled with your back. Change either the distance or timing, then repeat; changing both makes the result harder to interpret.
Uke’s arm slides out of the right-arm connection
Look at where you first meet the upper arm and whether your sleeve hand allows it to withdraw. Squeezing harder is not a complete solution if the elbow was never carried into position. Reduce speed, restore the arm relationship and check whether the connection survives a small, agreed withdrawal.
You need a big lift after fitting in
You may be entering below a balanced partner rather than moving their balance into the throw. You may also have a stance that prevents your legs contributing comfortably. Ask your coach to compare the entry before prescribing strength work. The immediate test is a smoother cooperative throw at lower effort, not a heavier partner.
Your shoulder or uke’s elbow feels stressed
Stop the repetition. Do not use pain as proof that the grip is tight enough. Ask the coach to inspect the arm angle, available space and whether uke can move into the throw. Return to a painless fitting drill or a different assigned task; this article cannot diagnose an injury or clear you to continue.
The technique works in uchikomi but disappears in randori
Check whether you can obtain the same sleeve and approach under resistance. If that stage fails, another hundred stationary entries may leave the actual problem untouched. Begin short grip-and-entry rounds in which an organised entry counts as the objective. Add the throw only after the approach becomes repeatable.
07 / SETUPS & COMBINATIONS
Attack the reaction, not the name of a sequence
Ko-uchi-gari into ippon-seoi-nage
Start with sleeve control and an available right heel for ko-uchi-gari. Make a genuine rearward attack. If uke withdraws the attacked foot and recovers their upper body forward while your sleeve control remains, turn beneath the arm into ippon-seoi-nage. If uke is still falling backward, complete the first attack instead. If they retreat beyond range, follow safely and rebuild rather than spinning into empty space.
Practise this first with uke giving one agreed recovery. Then let uke choose between staying vulnerable to ko-uchi and stepping away. Your decision is the learning target. A memorised two-throw rhythm can conceal the fact that you never looked at the response.
A standing entry that meets strong backward resistance
If you have not committed your balance and can return to a stable stance, the recovered heel may offer a new ko-uchi opportunity. Restore a usable upright relationship before changing direction. Do not attempt to reap backward while you are folded underneath uke with your back exposed. An abandoned entry and a safe reset are preferable to inventing a counter from a trapped position.
Movement before the arm entry
A small change in direction can bring the controlled shoulder toward you. Use an ordinary moving uchikomi task: uke follows, then occasionally refuses to follow. Enter only when the shoulder arrives. This is a setup drill without a named first throw, and it can be more informative than adding another technique when your distance recognition is the real weakness.
08 / DEFENCES & COUNTERS
Prevent the fit before trying a counter
For uke, early defence concerns stance, sleeve freedom and position. Notice the moment your right elbow is drawn across and tori’s right arm enters beneath it. Moving your feet to recover your base and avoiding a fixed, extended arm can remove the clean fit. Ask your coach to teach the movement without turning it into a tug-of-war at the shoulder.
Once you are loaded and committed to falling, prioritise the breakfall. Do not post a straight arm, wrench the captured elbow free or improvise a landing on the head. A defensive choice that is available before the entry may no longer be available after your feet leave the mat.
For tori, the important exposure is turning without taking uke along. Uke may move around the outside or establish control behind you. Practise recognising the loss of connection and recovering stance before the full turn becomes committed. Do not use repeated blind rotations as a response to someone already behind your hips.
Counters involving lifts or sacrifice actions require separate instruction, an appropriate partner and clear rules for the drill. This guide does not turn a failed ippon-seoi entry into permission to drop across another person’s legs. A useful initial defensive round ends when uke prevents the fit or tori achieves the agreed entry, before either person improvises a late counter.
09 / GROUND TRANSITIONS
What position did the throw actually create?
Uke lands on the side or back and you remain above
Keep appropriate sleeve control while finding a stable base beside the torso. If uke’s near arm and upper body remain accessible, kesa-gatame may be a useful continuation. Establish the pin’s arm and body relationship; do not assume that holding the original sleeve automatically creates a hold-down.
Uke turns inward or inserts a knee
The first problem is now a frame or leg between the bodies. Stay balanced and address that obstruction with a coached passing action. Reaching around the head while your hips remain far away can create space for recovery. Yoko-shiho-gatame becomes relevant only after you have a workable side position.
The entry fails and you finish underneath
Protect your posture and recognise uke’s position rather than continuing to pull on the sleeve as if the throw were still available. A coach-led positional round can begin here and end at a safe recovery or established top control. Do not rehearse an uncontrolled failed throw merely to obtain the starting position.
Separate throwing outcome from ground outcome in your notes: “entry stalled” and “gave up side control” are two events. Improving the second does not fix the first, but practising only successful landings leaves an important part of the technique unexamined.
10 / PRACTICE PROGRESSION
Progress from a connection to a decision
Stage 1 — fit without chasing height
Use slow cooperative entries from the agreed sleeve relationship. Uke reports whether the upper arm is carried comfortably; a coach checks the space and posture. Finish each entry by returning to stance. Progress when the connection is repeatable without an extra shuffle, painful squeeze or forward fall.
Stage 2 — one predictable step
Uke advances a single step at an easy pace. Tori chooses the entry moment and initially stops at the fit. Add supervised throws only when the approach and landing are controlled. Keep the step similar enough that you can compare repetitions; random movement at this stage can obscure a basic distance problem.
Stage 3 — two possible reactions
Begin with the ko-uchi setup. Uke either remains available to the first attack or recovers forward. Tori chooses the appropriate continuation and may reset if the distance is lost. Count correct decisions as well as completed throws. An entry made into the wrong reaction should not receive credit simply because a cooperative partner fell.
Stage 4 — short constrained randori
Allow normal movement and modest resistance, but retain the selected grip family and a coach-agreed set of attacks. Observe how often you obtain the sleeve, how often a real entry appears and what happens after it. Introduce freer randori only after both partners can respond safely to successful and abandoned entries.
These stages are adjustable practice proposals, not promotion standards. If your grip access breaks down in stage 4, return to that problem. Repeating the entire progression every session is unnecessary when the limiting step is already clear.
If obtaining the starting grip is the limiting step, use the grip-fighting drills guide to work on that approach before increasing throwing repetitions.
11 / COMPETITION EXAMPLE
Ono Yoko’s final at Paris 2020
The IJF Paris Grand Slam 2020 day-two report identifies Ono Yoko’s golden-score ippon-seoi-nage against Niizoe Saki in the women’s −70 kg final. That is the reported competition example; this page does not claim to have independently identified the exact grip from the full footage.
Use the IJF ippon-seoi-nage library to explore competitive applications. When you find the named contest in an official replay service, watch the exchanges before the score as well as the finish. Was the sleeve relationship established early? What movement preceded the entry? Which details are genuinely visible from that camera angle?
The practical comparison is between the opportunity and the demonstration. A clean basic entry explains the body relationship, while a contest shows how difficult it may be to obtain it. Do not infer that Ono’s result makes the throw universally suited to a particular body type, or that the decisive grip can be copied without its preceding movement.
12 / VARIATIONS & COMPARISONS
One-arm, two-hand and dropping forms
Ippon-seoi-nage: this page’s bent right arm connects beneath uke’s right armpit while the left hand controls the sleeve. Seoi-nage: the familiar morote form retains sleeve-and-lapel control and has a different task for the lapel arm. Seoi-otoshi: a dropping shoulder action, which deserves separate analysis of descent and connection.
“Ippon seoi nage” and “ippon-seoi-nage” are spelling variants, not different techniques. “Ippon” in this technique name does not promise an ippon score. The landing and applicable competition rules determine a score, not the name of the intended attack.
Grip and entry variations can change access without creating a new official technique. Compare one variable at a time: the controlled arm, starting grip, turning distance or standing versus dropping action. If all four change, you are learning a substantially different task even when the instructor uses the same familiar name.
13 / YOUR NEXT PRACTICE
Test whether the sleeve arrives with your turn
Take one question to the dojo: “At what point does uke stop moving with me?” After your normal warm-up, ask for a short supervised block of moving entries. Use one partner, one sleeve relationship and a predictable step. A phone clip from a safe position can help if both partners consent.
Record the setup, attempted entries, connected fits, completed throws where appropriate, and the most common loss of contact. Keep these counts separate. Ask your partner whether the arm connection was comfortable and ask your coach whether the first correction should concern the sleeve, approach or body position.
Illustrative record, not a performance standard: “Eight moving entries; five carried the shoulder into the fit, three left a gap. The gap appeared after a late step. Next block: enter earlier on the same movement, keeping the grip unchanged.” If the gap persists with an earlier entry, reconsider the hypothesis instead of adding speed.
Use the practice record template or your normal notebook. If you want a digital place for the observation, explore Judo AI. The useful output is a clear next decision, not a high repetition total with no explanation.
14 / SOURCES & REVIEW
Sources, authorship and review
Kodokan official technique names establish the name and category. The IJF Ippon-seoi-nage definition and video library and linked Kodokan demonstration are the primary technical references. The second video above is credited separately. The competition report linked in section 11 supports the named example, not every coaching suggestion on this page.
By Judo AI · Editorial review: October 9, 2026. Definitions, source identity, article consistency and links have been checked. Practice tasks and diagnostic questions are editorial proposals to discuss with your coach, not a validated training protocol. Named technical-coach approval is still pending. Video identities were verified; complete playback and every contest detail have not been independently analysed.
Rules and scope: this is a supervised judo study guide, not a current refereeing manual. Historical scores describe the cited event. Ask your coach to check the applicable age group and event rules before using grip variations or submissions in shiai; this draft does not certify their legality. Stop a practice action when your partner taps, asks to stop or reports pain.