O Soto Otoshi

SubFamily

Translation: major outer drop

Range & classification

Overview

O Soto Otoshi (major outer drop) is an ashi-waza technique closely related to o-soto-gari in which the thrower places the leg behind the opponent's supporting leg as a block or prop rather than reaping it, then drives the opponent backward over the obstruction. ^[1] The key distinction from o-soto-gari is the leg action — in o-soto-otoshi, the attacking leg does not sweep or reap but simply blocks the opponent's leg in place, and the throwing force comes entirely from the upper-body drive pushing the opponent over the blocked leg. ^[1],[2] The 'otoshi' (drop) designation indicates that the opponent drops or falls over the blocking leg rather than being swept away by it. ^[2],[3]

Also known as

Major Outer Drop^[1]Large Outer Drop^[2]O Soto OtoshiJP^[3]

Used in

Judo BJJ MMA Shuai Jiao

History & Origin

O soto otoshi was classified in the Kodokan system as a distinct technique from o-soto-gari, recognising that the blocking leg action creates different mechanics and tactical applications than the sweeping reap. ^[1] The technique has been part of the official Kodokan nage-waza catalogue and is widely taught alongside o-soto-gari. ^[2],[3]

Country of origin· shown in random order

Japan大外落とし(O Soto Otoshi)Judo, BJJ
BrazilBJJ, MMA
USAMMA
ChinaShuai Jiao

Effectiveness

O soto otoshi (major outer drop) blocks the opponent's outer leg with a straight leg while pulling them over it, producing a forward-falling throw. ^[1],[2]

Lineage

O soto otoshi is part of the Kodokan judo ashi-waza syllabus. ^[1]

Competition Record

O soto otoshi is scored in IJF competition, often seen in heavyweight divisions. ^[1]

Images

No images yet for this technique.

Biomechanical Mechanism

Primary Action — Sweeping, reaping, or blocking the opponent's foot or leg to remove their base of support

Joints Involved — Attacker's sweeping leg (ankle or shin contact), opponent's supporting ankle or knee (swept)

Force Vector — Two opposing forces — the upper body is directed one way while the sweeping leg removes the support in the opposite direction

Timing Principle — Maximum effectiveness when the opponent's weight is committed to the targeted foot — timing supersedes strength

Position & Entry

From judo grip — Use push-pull timing (kuzushi) to catch the opponent as they step, sweep the support foot in the direction of their movement

From clinch (collar tie) — Push or pull to make the opponent step, sweep the stepping foot at the exact moment it lifts off the mat

Videos

Sport-Management- System

O SOTO OTOSHI

O Soto Otoshi·Sport-Management- System

Technical judo

Sport-Management- System

O SOTO OTOSHI

O Soto Otoshi·Sport-Management- System

TECHNIQUES JUDO O SOTO OTOSHI- O SOTO GARI

2 videos

Learn This Technique

No instructional courses yet for this technique.

Ratings

Danger Rating

Risk of injury to the person this technique is applied to

Very High7/10

O-Soto-Gari is one of judo's most dangerous throws; direct backward fall onto head/spine (Mifune 1956)

Difficulty

Skill level needed to execute this technique reliably

Intermediate

Competition Legality

Whether this technique is allowed under major competition rule sets

Restricted

— no leg attacks below waist

UWW International Wrestling Rules, January 2026PDF

Legal

— 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

— 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 RulesPDF

Training Notes

✓O soto otoshi (major outer drop) blocks the opponent's leg from behind while driving them straight down

✓Unlike o soto gari which reaps through the leg, o soto otoshi places the leg behind the opponent as a block and drives them over it

✓Step to the outside and place your leg behind the opponent's leg without sweeping

✓Push the opponent backward and downward with powerful upper body action — they fall over the obstruction

✓The throw relies more on the upper body drive than on the leg action — the leg is a prop, not a reap

✓O soto otoshi generates a very powerful backward fall because the opponent drops straight down rather than being swept

✓This variation is effective when the opponent braces against the sweeping action of o soto gari

Common Mistakes

!Trying to sweep or reap — the otoshi version is a block, not a sweep; the leg stays stationary behind the opponent's

!Not driving the opponent's upper body down hard enough — the throw requires strong upper body force since the leg is passive

!Placing the leg too far behind the opponent so there is space between the block and their leg

!Not getting close enough — chest-to-chest contact is even more important for otoshi because the upper body does all the work

!Bending at the waist instead of driving down through the hips

!Placing the blocking leg and then waiting — the block and drive must be simultaneous

!Falling forward out of control — the standing leg must support your weight through the throw

Related Techniques

Foot Sweep — complementary off-balancing technique using similar directional forces Breakfall (Ukemi) — essential receiving skill for safe practice of this throw

Counter Techniques

Lower Centre of Gravity — bend knees and drop hips to make the throw harder to execute Lift the Targeted Leg — raise the foot being attacked above the sweeping action Counter-Throw — exploit the attacker's committed weight to throw them instead Grip Break — deny the thrower their preferred gripping configuration Stiff-Arm — maintain distance with straight arms to prevent the entry

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)

2SyllabusKodokan Judo — Official Katame-waza Classification

Official Kodokan ground technique classification system

3SyllabusKodokan Judo Institute — Official Waza Names

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

precise timing, ankle coordination, upper body kuzushi ability

Favours

excellent balance and quick reflexes

Key muscles

tibialis anterior, calves, hip rotators, forearms (grip)

Sub-techniques

Find by what a technique does — not its name

Every move, in any martial art, shares a few universal traits. Mix and match below to pinpoint the right tool — or compare equivalents across styles.

Standard O Soto Otoshi

Genus

Standard O Soto Otoshi executes the classical major outer drop where the thrower steps alongside the opponent, places the leg behind the opponent's supporting leg as a rigid block, and drives the opponent's upper body rearward over the obstruction. [1] The blocking leg is planted firmly, creating a fixed fulcrum over which the opponent's body rotates as the hands force them backward. [1,2] The throw relies on strong rearward kuzushi and committed forward drive from the thrower to overcome the opponent's resistance. [2,3]

Explore

Frequently Asked Questions

How does the O Soto Otoshi work?

O Soto Otoshi (major outer drop) is an ashi-waza technique closely related to o-soto-gari in which the thrower places the leg behind the opponent's supporting leg as a block or prop rather than reaping it, then drives the opponent backward over the obstruction. The key distinction from o-soto-gari is the leg action — in o-soto-otoshi, the attacking leg does not sweep or reap but simply blocks the opponent's leg in place, and the throwing force comes entirely from the upper-body drive pushing the opponent over the blocked leg.

Where does the O Soto Otoshi come from?

O soto otoshi was classified in the Kodokan system as a distinct technique from o-soto-gari, recognising that the blocking leg action creates different mechanics and tactical applications than the sweeping reap. The technique has been part of the official Kodokan nage-waza catalogue and is widely taught alongside o-soto-gari.

Is the O Soto Otoshi legal in competition?

IJF: legal — Legal throwing technique; IBJJF: legal — Legal at all belt levels; UWW: restricted — Legal in freestyle, banned in Greco-Roman (no leg attacks below waist); Unified MMA: legal — Legal throwing technique; ADCC: legal — Legal; FIAS Sport Sambo: legal — Legal; FIAS Combat Sambo: legal — Legal

How dangerous is the O Soto Otoshi?

Danger rating 7/10. Very High — O-Soto-Gari is one of judo's most dangerous throws; direct backward fall onto head/spine (Mifune 1956)

How do I set up the O Soto Otoshi?

The standard setup chain: Grip Setup (Kumi-kata) → Off-Balance (Kuzushi) → Entry (Tsukuri) → Execution (Kake).

How do I defend against the O Soto Otoshi?

Standard counters include: Lower Centre of Gravity — bend knees and drop hips to make the throw harder to execute / Lift the Targeted Leg — raise the foot being attacked above the sweeping action / Counter-Throw — exploit the attacker's committed weight to throw them instead / Grip Break — deny the thrower their preferred gripping configuration.

What are the variants of the O Soto Otoshi?

Common variants: Forward sweep (sweeping the foot in the direction the opponent is stepping); Rear sweep (sweeping the foot backward as the opponent retreats); Combination sweep (chaining sweeps to both feet); Counter sweep (timing the sweep as the opponent initiates their own attack).

How effective is the O Soto Otoshi in competition?

O soto otoshi is scored in IJF competition, often seen in heavyweight divisions.

What are common mistakes when doing the O Soto Otoshi?

Top errors to watch for: Trying to sweep or reap — the otoshi version is a block, not a sweep; the leg stays stationary behind the opponent's / Not driving the opponent's upper body down hard enough — the throw requires strong upper body force since the leg is … / Placing the leg too far behind the opponent so there is space between the block and their leg / Not getting close enough — chest-to-chest contact is even more important for otoshi because the upper body does all t….

What are other names for the O Soto Otoshi?

The O Soto Otoshi is also known as Major Outer Drop, Large Outer Drop, O Soto Otoshi.

o soto otoshi throw foot leg technique throw ashi waza major outer reap judo bjj mma major outer drop large outer drop