Ko Uchi GaeshiHow it works and how to improve it

01 / AT A GLANCE

Ko-uchi-gaeshi: the defining action

Ko-uchi-gaeshi counters ko-uchi-gari by freeing the attacked leg and turning the attacker through the remaining upper-body connection. It is classified as a hand technique; simply kicking the attacking foot away does not explain the finish.

Name and scope: Ko-uchi-gaeshi (小内返), commonly rendered as small inner reap counter, belongs to Te-waza. Searches for “ko uchi gaeshi” and the hyphenated spelling refer to the same official technique here. An informal nickname should be checked against the actual action before being treated as a separate technique.

Position convention: Uke attacks tori’s right leg with right ko-uchi-gari. Tori slips the right leg clear and turns toward the left to guide uke into the counter. This page keeps that single side convention throughout the drills. Tori means the person performing the technique and uke the receiving partner. When reviewing a mirrored camera image, identify each person’s own sides first. Reverse the whole relationship for a left-sided lesson rather than changing one limb while preserving incompatible directions elsewhere.

The intended reader can already practise under supervision and wants to connect demonstration, diagnosis and decision-making. For ko-uchi-gaeshi, the central question is: free the targeted leg while retaining the shoulder connection for the turn. Beginners can study the shape with a coach; applying it against variable resistance requires the additional recognition and control work below. The article does not assign a universal belt level or promise that one body type will succeed automatically.

02 / WATCH THE TECHNIQUE

Official demonstration and a second viewing reference

Track the targeted foot before watching the hands. Then identify how the leftward turn uses the remaining connection after the reap misses, rather than treating any escape as a completed counter.

Official reference: Kodokan. Second demonstration: Efficient Judo. Open the publisher links if either embedded player is unavailable.

A practical viewing question is: “Can I remove the attacked foot without moving my whole body beyond the range of the counter?” Compare that question across the official and second reference. Differences in speed, partner stance or grip route may explain different appearances. Do not combine isolated details from incompatible versions into one repetition. No timestamps or claims about unseen scoring sequences are supplied here.

03 / WHEN TO USE IT

Recognise an opening and recognise its absence

A usable starting relationship

The inner reap is committed enough to create a directional response, but tori’s right foot can still move freely. Sleeve and upper-body control remain available as uke reaches into the attack.

Keep the attacked right foot identifiable from the start of the exchange. With uke approaching from ordinary grips, tori should be able to unweight that foot without leaning the trunk far backward. The remaining support must permit a leftward turn while the hands retain the shoulder connection. A sleeve grip at full extension may survive the escape, but it usually gives much less useful control than the closer relationship required for the counter.

When the same shape is not an opening

The right foot is already trapped under a committed backward fall or the grips have separated. Pulling the leg away against a loaded knee is not an appropriate late counter attempt.

A light inner-foot touch can be a feint rather than a committed reap. If tori withdraws dramatically for every touch, uke can repeatedly disturb the stance without making a real attack. Start with clearly different feints and genuine entries. Tori preserves posture for the feint and clears the foot for the committed attack. The distinction should be learned before adding a fast hand turn, otherwise the drill rewards predictable overreaction.

Movement to invite or read

Begin with a small ko-uchi-gari approach that clearly identifies the targeted right foot. Gradually vary the timing while keeping force low enough for a controlled foot clearance. In an opposite-lead or unfamiliar grip arrangement, have the coach map the relevant limbs again. The fixed convention in this article provides a reference for comparison; it does not guarantee that the same approach distance survives every stance.

04 / HOW IT WORKS

Connect the grips, support and finishing action

Hands and upper-body connection

Keep the attacker’s shoulder line connected as the right leg clears. The hands and torso turn left together, using the attacker’s forward-reaching relationship rather than dragging an isolated wrist sideways.

Feet, hips and available support

Unweight and withdraw the threatened right foot enough to avoid the reap, while keeping a stable base on the remaining support. Replace the foot as needed to carry the leftward body turn instead of hopping indefinitely.

Complete the action under control

Continue the leftward turning action as uke’s attempted inner reap passes without a useful target. Guide the body into the available fall and retain control of the landing arm without twisting it behind the shoulder.

Study the relationship beneath the visible shape

The attacked right foot must become available before it can participate in the countering turn. Trying to rotate while that foot is still carrying weight against the incoming reap can trap the knee between two directions. Begin with an indicated attack at low force and practise a small unweighting rather than a dramatic backward jump. The observer watches whether the trunk remains over a usable support as the foot clears.

The leftward turn should involve the body and hands together. If the hands pull sideways while the torso leans backward, uke may simply withdraw the attacking foot and recover. A close, turnable posture preserves the connection that makes the counter possible. This is also why a successful escape does not always lead to a throw: the foot may be free while the body has moved too far away to guide the attacker.

05 / KEY POINTS

Four cues with observable checks

Keep the defining mechanism visible

Free the targeted leg while retaining the shoulder connection for the turn. Ask the observer to describe that action before commenting on power. If a repetition succeeds through a different mechanism, record what actually happened. A fall or escape can be useful without proving that the intended ko-uchi-gaeshi relationship improved.

Verify the position before adding commitment

The right foot should be visibly free before the turn asks it to carry weight again. Tori should not be rotating a planted foot against the incoming reap. Use this as a brief checkpoint in cooperative practice, then remove the pause as coordination improves. The checkpoint is not a recommendation to freeze during a live exchange; it is a way to identify the relationship that must survive movement.

Preserve the correct stopping decision

Use a coach-arranged unavailable position to check your decision before adding resistance to ko-uchi-gaeshi. The precise release or reception boundary is described in the defence section below. Otherwise, a partner who always supplies the ideal opening can teach commitment without teaching selection. A correct reset belongs in the practice record alongside a controlled completion.

Make the result lead to a next position

The turning finish may leave tori beside uke rather than directly above the chest. Guide the descent, restore both feet or knees to a stable base and check where the near arm has landed. The observer should describe the actual ending, not the intended ending. That description determines whether the next task belongs to finishing, stabilising on top or recovering underneath.

06 / PROBLEMS & ADJUSTMENTS

Diagnose the earliest cause before changing force

07 / SETUPS & COMBINATIONS

Make the next action depend on a response

08 / DEFENCES & COUNTERS

Separate prevention, recovery and a counter opportunity

The attacker can reduce the counter opening by keeping posture and not reaching the shoulders ahead of a distant inner reap. The defender can prevent the original throw through earlier weight adjustment even when no counter is available.

Stop boundary: If the right foot cannot clear without knee twisting, receive the original action rather than wrenching the leg free. Stop the counter if the upper-body grip becomes an isolated arm lever. The receiving partner must retain an agreed ukemi response when the original attack has succeeded. Do not replace reception with a desperate straight-arm post or a joint-twisting rescue.

The attacker can reduce the opening by keeping the trunk supported instead of reaching the shoulders over a distant ko-uchi-gari. Compare those two entries at low force. Tori should recognise that the overreaching attack leaves a more accessible turning relationship, while a balanced withdrawal may leave no immediate counter. When the right foot is already trapped in a backward fall, receive the throw rather than twisting the loaded knee free to preserve the counter attempt.

09 / GROUND TRANSITIONS

Read the position after the main action

If uke reaches the mat on the back, move into a side hold with a clear chest and hip relationship. If uke remains kneeling after the failed attack, control position without assuming the technique tag or attempted counter determines the score.

The leftward finish can leave uke’s arm under the torso or between the bodies. Before settling into a side hold, check that the retained sleeve does not pull the elbow behind the shoulder. If uke lands kneeling, tori should recover a top angle instead of pressing down on an isolated wrist. If the grips separate entirely, establish distance and posture first. The foot’s successful escape is not itself a ground-control connection.

A completed throw and an established hold are separate outcomes. A controlled landing can still require leg clearance or shoulder repositioning before useful top control exists. Compare the actual ko-uchi-gaeshi ending with the planned one, and practise the common arrival independently if it repeatedly becomes the weak part of the sequence.

10 / PRACTICE PROGRESSION

Progress from a clear shape to a real choice

Stage one: make the reference repeatable

Use the stated ko-uchi-gaeshi convention with a cooperative partner. Begin slowly enough to identify the grip and support roles, and stop before completing an action that has lost its defining connection. Progress when both partners and the observer can describe the same relationship without guessing. Repetition count alone does not establish readiness.

Stage two: introduce the movement cue

Revisit the specific moving relationship described under “When to use it” for ko-uchi-gaeshi. First keep its direction predictable, then vary its timing while preserving the same grips and side convention. Keep resistance modest while the cue changes. If the reference shape disappears on every moving attempt, reduce the step or escape amplitude and preserve the correct direction rather than forcing a finish.

Stage three: require a decision

Uke sometimes commits the inner reap and sometimes merely touches the foot as a feint. Tori frees and turns for a genuine connected attack, but preserves stance against the feint. A useful round includes a correct continuation and a correct decision not to continue. Record both. When these choices remain clear, increase unpredictability before increasing force, with the coach deciding what the pair can control.

Stage four: constrain the exchange, then broaden it

For a constrained round, uke may use a genuine ko-uchi-gari entry or a light foot feint while maintaining the same grip. Tori must avoid lifting the foot unnecessarily for every touch. Early rounds can end after the decision, with no throw. Later, a committed connected attack permits the controlled counter. This trains discrimination and makes it harder for a partner to destabilise tori with repeated feints.

A useful observation record has separate columns for the attacked foot, shoulder distance and turn timing. If the foot clears consistently but the shoulders separate, the next task is smaller withdrawal. If the shoulders stay close but the foot remains loaded, the next task is earlier unweighting. Those are different corrections and should be tested independently before increasing resistance.

11 / COMPETITION EXAMPLE

A named official replay selection to study

Verified selection: Mammadali MEHDIYEV vs Jiri PETR — World Championships Senior 2019. The IJF technique library page includes this contest in its Ko-uchi-gaeshi technique-tagged replay data. The listing verifies the named pairing, event and technique tag. The listing credits the tagged action to Mammadali Mehdiyev. It does not by itself establish the final score, a precise timestamp or a complete tactical account.

Use the selection to investigate one question: “Can I remove the attacked foot without moving my whole body beyond the range of the counter?” Before the tagged action, identify the grips and movement that made the situation possible. During the action, compare the defining connection with the official demonstration. Afterward, identify recovery and position. If the player or angle does not show one of those phases, leave that part of the observation blank rather than inferring it from the tag.

A useful competition note for ko-uchi-gaeshi separates three things: what the official listing states, what you can actually see in playback and what you propose to test in practice. This article confirms the first and supplies prompts for the other two. It does not present an unviewed sequence as a frame-by-frame analysis, nor treat historical footage as certification under current event rules.

12 / VARIATIONS & COMPARISONS

Keep neighbouring techniques and variants distinct

Ko-uchi-gari is the original inner reap; ko-uchi-gaeshi is the hand-technique counter described here. A new foot sweep after avoiding the attack is a separate action, even if it happens in the same exchange.

The original ko-uchi-gari removes an inner heel support; ko-uchi-gaeshi frees that target and turns the attacker through the hands. Sumi-otoshi can address an upright rearward recovery, while de-ashi-harai would require a newly available moving foot. If an escape is followed by a foot sweep, name that second mechanism rather than labelling the whole exchange ko-uchi-gaeshi by default.