YR Sports Lab
Osoto Gari ("major outer reap") is one of the stand-up techniques BJJ players borrow from judo most often: you plant one foot beside your opponent, reap their supporting leg from behind with the other, and drive them down with a coordinated push-pull of the upper body. It is not a jiu-jitsu invention. Judo founder Jigoro Kano established the Kodokan in 1882, and when he organised the Gokyo no Waza classification in 1895 he placed Osoto Gari in the very first group. It remains one of the Kodokan's 67 official throwing techniques today. This guide walks through its origin story, step-by-step mechanics, entry timing, strengths and limits, common counters, its role in competition, and a piece of injury research showing that defending it is more dangerous than attacking with it.
1. Origins: A 140-Year-Old Judo Fundamental That Built a "God of Judo"
Jigoro Kano (1860–1938) studied several classical jujutsu schools before founding the Kodokan in Tokyo in 1882 and systematising what became modern judo. In 1895 he organised the Kodokan's throws into the Gokyo no Waza, five groups ordered by difficulty so that techniques could be taught in sequence. Osoto Gari belongs to the first group (Dai Ikkyo), making it one of the earliest throws a beginner learns, and it is classified as ashi-waza (a leg technique). The Gokyo's contents have shifted over time: the list was fixed at 40 techniques in 1920 and stayed that way until 1982, after which the Kodokan expanded its catalogue to today's 67 official throws. Osoto Gari has been on every version of the list.
203 Matches Unbeaten: The "God of Judo" and His Signature Reap
If Osoto Gari has a modern ambassador, most of the judo world would name Yasuhiro Yamashita (born 1 June 1957). From October 1977 until 1985 he went 203 consecutive matches without a loss (including 7 draws), won four World Championship golds (1979, two weight categories in 1981, and 1983), and at the 1984 Los Angeles Olympics took the open-weight title by beating Egypt's Mohamed Ali Rashwan despite tearing a right calf muscle earlier in the tournament. He received Japan's People's Honour Award the same year. Wikipedia records that his best techniques were "Osoto Gari combined with Ouchi Gari", and that combination became one of the defining images of his career.
Osoto Gari has no single inventor. It emerged from Kano's systematisation of classical jujutsu leg techniques, but the man who turned it from a teaching fundamental into an elite-level weapon is universally recognised as Yamashita. That lineage also explains why judo and BJJ cross-trained black belts such as Dan McCormick and Matt D'Aquino still put it among the first stand-up techniques they teach to jiu-jitsu players: the mechanics are intuitive, yet executing it well demands genuine control of balance.
2. Mechanics: Break the Balance First, Then Reap
The key to Osoto Gari is not how hard you swing the leg but whether you broke the opponent's balance before the reap (kuzushi in judo terminology). Without kuzushi, an Osoto Gari is essentially just kicking someone in the leg, and a well-grounded opponent will not budge. The classic right-side version breaks down as follows:
| Step | Key points |
|---|---|
| ① Grip (Kumikata) | One hand on the collar or behind the neck, the other controlling the sleeve or arm, building a solid upper-body connection |
| ② Break balance (Kuzushi) | Use a push-pull rhythm or circular footwork to drive their weight backward or catch them on a single supporting leg |
| ③ Enter and post (Tsukuri) | Step your left foot in beside them, outside their right foot, and close the distance to create the pivot point for the throw |
| ④ Reap (Kake) | Swing your right leg in an arc behind their right leg (against the hamstring) while driving the upper body down to take them over |
| ⑤ Landing and follow-up | Follow them down in the direction of the fall and establish side control or another top position before they can turn in |
A sports-biomechanics study of male black-belt judoka adds a further detail: reaping-leg velocity is not driven by leg strength alone. The tilt angle and rotational velocity of the head and trunk are equally important predictors. When the attacker's head leans toward the target direction early, the visual system processes the spatial information faster and the trunk accelerates its rotation, making the whole reap crisper. This is precisely why coaches keep telling beginners to look where they are throwing instead of focusing only on the leg.
3. Entry Timing and Setups
There are a few reliable windows for launching Osoto Gari in a grappling stand-up exchange:
First, use a push-pull rhythm to force single-leg support. By pushing and pulling or circling, you drive their weight backward or cross their feet so that they are momentarily balanced on one leg. That is the instant kuzushi is complete, and the best moment to enter.
Second, enter off a collar grip or a No-Gi head control. In the Gi, entering directly from a collar grip is common; in No-Gi the entry usually comes off a collar tie or an overhook, controlling the upper body first and then delivering the reap.
Third, counter the guard pull. Judo and BJJ black belt Miha Perhavec has demonstrated a tactic he calls the "Blitzkrieg": throw repeated foot-sweep feints so the opponent becomes reluctant to commit, then the moment they start to crouch and shift their weight back to pull guard, fire off a big, committed Osoto Gari and lift them off the ground before the guard ever forms. It works especially well against opponents who habitually sit down and pull guard at the start of a match.
4. Strengths and Limitations
| Strengths | Limitations |
|---|---|
| A first-group Gokyo fundamental, legal in both Gi and No-Gi, with a mature teaching system behind it | The attacker carries their weight on one leg at the moment of execution, so poor kuzushi costs you your own balance too |
| High success rate: it puts the opponent down and gives you top control with no extra transition needed | An early sprawl that pulls their hips back and away leaves the reap swinging through empty space |
| An effective answer to opponents who want to pull guard from standing, disrupting their preferred rhythm | A forceful reap without kuzushi invites Osoto Gaeshi, the classic counter-throw |
| Excellent training for balance control and grip rhythm, useful in judo and jiu-jitsu alike | Requires reasonable core strength and single-leg stability; athletes lacking conditioning or mobility struggle to execute it cleanly |
5. Common Counters and Defences
The window to counter Osoto Gari sits in the phase before the attacker's supporting foot is fully planted beside you and before kuzushi is complete. The main options:
First, Osoto Gaeshi (the major outer counter-throw). This is the textbook counter in judo's classification: as the attacker commits their reaping leg, the defender drives down and rotates the hips, using the attacker's own momentum to throw them instead. It is one of the standard examples of kaeshi-waza (counter techniques) in judo instruction.
Second, sprawl to break the distance. As soon as you feel the entry coming, drop your weight back and widen your base so the reap can never reach an effective contact point behind your leg.
Third, deny the entry position. As they step in to post beside you (tsukuri), push them off or pivot away so the pivot point never forms. Without it, the reap has nothing to work against.
What Comes Next After the Counter
If the defender lands the Osoto Gaeshi, they usually arrive directly in top position and can chain straight into pinning or submission attacks, flipping a defensive situation entirely.
If the attacker's reap is broken by a sprawl, do not abandon the sequence. This often becomes a scramble with both athletes going down, which flows well into a single leg or an immediate fight for inside position on the mat.
6. How Often It Shows Up in Competition
Neither the IBJJF nor ADCC publishes usage statistics for individual stand-up techniques, so what follows is an observation from third-party instructional communities and should be read as such. Several cross-trained black belts, including Dan McCormick (with an Olympic-level judo background) and 4th-dan judo black belt Matt D'Aquino, have long listed Osoto Gari as one of the core stand-up techniques they teach jiu-jitsu players, on the grounds that its logic is intuitive and it directly punishes opponents who crouch to pull guard. It is one of the most-borrowed judo throws in jiu-jitsu, though no reliable public figure for its exact competition usage rate exists.
On the rules side (per current IBJJF rules, checked 2026/08), Osoto Gari carries no rank restriction and applies in both Gi and No-Gi. For scoring, any takedown that puts the opponent down and holds a stable top position for 3 seconds is worth 2 points. Osoto Gari scores exactly as a hip throw, a single leg or any other standard takedown does, with no bonus.
7. Safety: Defending Is More Dangerous Than Attacking
The most important safety issue around Osoto Gari comes from a biomechanical study of 26 elite judo athletes (20 men, 6 women). Using 3D motion capture, force plates and electromyography, the research team found that most ACL ruptures occurred in the athlete defending an Osoto Gari attack rather than in the attacker. During the common defensive reaction, defenders showed a maximum knee flexion angle of about 29 degrees, a maximum valgus angle of about 10 degrees, a valgus moment of about 58 newton-metres and an internal rotation angle of about 9 degrees, all recognised ACL injury risk factors. The team then tested a modified defensive reaction, which significantly reduced the valgus angle (to roughly 1 degree) and the valgus moment (to roughly 31 newton-metres) while increasing hamstring muscle activity, showing that changing knee position during the defence genuinely lowers injury risk.
In other words, training this throw is not only about learning to throw people. It is just as much about learning how to be thrown. That is why traditional judo gyms insist beginners spend weeks drilling ukemi before they are allowed into free randori.
・Keep the reaped leg relaxed and slightly bent, and never lock the knee out against the force; a stiff leg is the high-risk position for valgus loading and ACL injury
・Beginners must be comfortable with ukemi (breakfalls forward, backward and to both sides) before doing live throwing practice
・Attackers should build reaping force gradually and never unload a full-power Osoto Gari on a partner who is not confident in their breakfalls
・Slap the mat with your arm on landing to spread the impact instead of posting on a straight arm, which risks compensatory wrist or shoulder injury
FAQ
Can white belts train Osoto Gari?
Yes. Osoto Gari sits in the first group (Dai Ikkyo) of judo's Gokyo classification, carries no rank restriction, and is legal for white belts in both Gi and No-Gi rulesets. Most gyms will ask you to be comfortable with ukemi (breakfall technique) before throwing in live rounds, which is a safety prerequisite rather than a rule.
Is defending Osoto Gari really more dangerous than attacking with it?
According to a biomechanical study of elite judo athletes, most ACL ruptures happen to the athlete defending an Osoto Gari attack rather than to the attacker. The reason is that a defender who stiffens the knee to resist tends to generate excessive valgus angles and rotational torque, which puts them at higher risk than the person initiating the throw.
Can Osoto Gari be used to counter a guard pull?
Yes, and it is a well-known tactic in the grappling stand-up game. Judo and BJJ black belt Miha Perhavec has demonstrated using repeated foot-sweep feints (he calls it the Blitzkrieg) to make the opponent hesitate, then firing an Osoto Gari the instant they crouch to pull guard, catching them as their weight shifts back but before they sit down.
How many points is Osoto Gari worth in IBJJF competition?
Under current IBJJF rules (checked 2026/08), any takedown that puts the opponent down and establishes a stable top position for 3 seconds scores 2 points. Osoto Gari is a standard throw in that category with no bonus scoring, so it is worth the same as a hip throw, a single leg or any other takedown.
How do you protect yourself when someone hits you with Osoto Gari?
The core principle is to go with the throw instead of fighting it: keep the reaped leg relaxed and slightly bent so the knee never locks out against the force, and slap the mat with your arm (ukemi) on landing to spread the impact rather than posting on a straight arm. This is exactly why judo gyms make beginners drill breakfalls for weeks before allowing free randori.
References
1. Wikipedia. O soto gari. en.wikipedia.org (checked 2026/08; supports Osoto Gari's placement in the first Gokyo group Dai Ikkyo, its ashi-waza classification, its inclusion among Kano's original 40 techniques and among the Kodokan's current 67 official throws)
2. Judo Info. The Gokyo of Kodokan: 40 Throwing Techniques. judoinfo.com (checked 2026/08; supports the 1895 creation of the Gokyo at the Kodokan, the 40-technique list fixed from 1920 to 1982, and Osoto Gari as the fifth technique of the first group)
3. Wikipedia. Yasuhiro Yamashita. en.wikipedia.org (checked 2026/08; supports Yamashita's biography, the 203-match unbeaten streak, the injured 1984 Los Angeles Olympic gold, the four World Championship titles and the statement that his best techniques were Osoto Gari combined with Ouchi Gari)
4. BJJ Eastern Europe (BJJee). Counter Their Guard Pull with a Huge Osoto Gari. bjjee.com (checked 2026/08; supports Miha Perhavec's Blitzkrieg tactic, namely the repeated foot-sweep feints followed by an Osoto Gari at the instant of the guard pull)
5. Lambert C, Riesterer J, Mauch M, Lambert M, Paul J, Ritzmann R. (2022). Modified defense reaction reduces biomechanical and myoelectrical ACL injury risk factors in elite Judo. J Sports Sci;40(12):1325-1335. PubMed PMID 35616597 (supports the finding that most ACL ruptures occur while defending Osoto Gari, and the associated knee biomechanics data)
6. Liu L, Deguchi T, Shiokawa M, Hamaguchi K, Shinya M. (2025). Analysing head and trunk motion in the judo osoto-gari technique: relationship to sweeping-leg velocity. PeerJ;13:e18862. PubMed PMID 39866562 (supports the biomechanical finding that head tilt angle and trunk rotational velocity relate to reaping-leg velocity)