In randori, though, you get thrown by people whose names you know, your best throw stops working against anyone with a pulse, and the senior in the corner makes it look restful while you burn through three minutes like they owe you money. Then, some month you cannot quite name afterward, a throw lands in randori that you did not plan, against full resistance, and it feels easy. That throw is why randori exists.
Randori means free practice. It is the part of training where a partner resists, adapts, and throws back, and it is where judo stops being choreography and becomes a skill. Kano built his whole method on two legs: kata, the forms, and randori, the live practice. The forms hold the complete art. Randori is where your share of it becomes real.
Section 01What Randori Is For, at Each Stage
The job randori does changes as you do, and confusion about which job you are on causes most of the frustration around it.
In the first months, randori is a measuring instrument for your ukemi and your calm. The goal is not throws. It is falling without bracing, breathing while someone moves you, and learning that being thrown by a training partner is information, not defeat. The First Month plan in this series ends at exactly this stage, with light randori against a senior who works at your level.
In the developing stage, randori becomes the laboratory for your throws. A throw that works in uchikomi has correct shape. A throw that works in randori has timing, grip sense, and a follow-up when it is defended. This stage is where combinations are born, because a resisting partner defends the first throw the same way every time, and the defense points at the second one.
For the advanced player, randori is where tactics and honesty live: grip systems under pressure, attacks chained three deep, groundwork transitions at live speed, and the discipline of training hard without injuring the partners your progress depends on. At this level the best randori often looks quiet. The work is in the grips and the feet.
Section 02The Forms of Randori
Randori is not one thing. Good clubs run it in forms, and naming the form before the round starts is what keeps the round useful.
| Form | How it runs | What it trains |
|---|---|---|
| Yakusoku geiko (agreed practice) | Partners agree the terms in advance: one throws, one receives, or both attack only with named throws | Specific throws at live speed, without the contest creep that ruins technical work |
| Throw for throw | Partners alternate, each throwing the other in turn with full entries and real falls | Ukemi under honest throws, and your own throwing against a body that just stood up |
| Light randori | Full freedom, capped intensity, often half speed or half power by agreement | Timing, movement, and reading a partner, with the cost of errors turned down. The default form for mixed levels |
| Full randori | Open practice at training intensity, both partners attacking and defending freely | Everything at once. The standard form between well matched partners |
| Grip randori | Rounds fought only for grips, no throws allowed, or throws allowed only from a grip won against resistance | Kumi-kata under pressure, the subject of the companion article in this series |
| Newaza randori | Starts on the ground, or goes to the ground and stays there | Pins, escapes, and the transitions between standing and ground |
Throw for throw and yakusoku geiko are sometimes treated as lesser forms by players in a hurry. They are not. They are how throws get built to the point where full randori can test them instead of burying them.
Section 03Why Throws Die Between Uchikomi and Randori
The most common complaint in the developing stage is some version of the same sentence: my throw works in uchikomi and disappears in randori. The throw usually has not changed. The conditions around it have, and uchikomi, practiced the way most clubs practice it, hides five of those conditions completely.
The partner stands still. Standard uchikomi is done against a partner rooted in place, often in a posture no opponent would hold for half a second. Your entry is timed to a body that is not moving. In randori the body moves, and an entry timed to a statue arrives late or early against a person.
Nobody fights for the grips. Uchikomi starts with your grips already placed, placed by agreement. In randori your grips are earned inside a fight your partner is also fighting, and the throw that needed a high lapel hand gets attempted from whatever grip you happened to be left holding. The throw did not fail. It was never given its grip.
There is no movement to borrow. Uchikomi generates its own off-balance on the spot. A live partner's balance is broken largely by their own steps: the push, the pull, the shift of weight as they circle. Throws in randori are timed to those steps. A player who has only ever thrown from standing still has never practiced the timing randori actually runs on.
The counter is real. In uchikomi nothing punishes a lazy entry. In randori a half-committed entry gets countered, and after two or three counters the entries stop being committed at all. What looks like a technique problem is often a nerve problem created by honest consequences. The player has learned, correctly, that a weak entry costs them, and has not yet learned what a strong one requires.
The first throw is treated as the whole attack. Uchikomi ends at the throw. Randori does not. A defended first throw is the normal opening state of an exchange, not a failure of it, and the player who has only rehearsed single throws stands still after the defense, considering the wreckage, while the exchange moves on without them.
| What uchikomi hides | What randori exposes | The bridge that closes it |
|---|---|---|
| A stationary partner | Throws must be timed to a moving body's steps | Moving uchikomi, entries fitted to the step |
| Grips given by agreement | Grips are won, lost, and won back inside the exchange | Grip-first rounds, where no throw counts until its grip is won |
| Balance broken on the spot | Kuzushi comes from the partner's movement and your grips together | Moving uchikomi with push and pull feeds |
| No cost for a weak entry | Counters punish half commitment | Nage komi doses, where the finish is rehearsed at full commitment |
| The throw as the end | A defended throw is the start of the combination | Situational randori with a second attack required |
The bridge is not a mystery, and it is not more uchikomi done harder. It is a staircase between the drill and the round.
Moving uchikomi is the first step up. Your partner walks, circles, pushes, and pulls while you fit the entry to their steps instead of to a count. Slowly at first. The entry has to find the moving target before it can find the defending one.
Nage komi, throwing practice where your partner takes the fall on every rep, is the second step. Uchikomi rehearses the entry and stops at exactly the moment commitment matters most. Nage komi finishes the throw, usually in short sets, often onto a crash mat, so the finish gets the repetitions the entry already has. A throw you have finished fifty times in practice does not need willpower in randori. It needs an opening.
Situational randori is the third step: short rounds carrying one constraint that isolates a gap. A throw counts only off a grip won against resistance. Every defended attack must be followed by a second attack. The exchange restarts the moment a strip leaves a player holding nothing. Each constraint names one of the five hidden conditions and forbids you to hide from it.
Grip-first rounds are the fourth step, and the simplest form of the third. Inside otherwise normal randori, a throw only counts, between the two of you, if it came off the grip that throw needs, held against resistance. Players discover within one round how many of their attempts were launched from grips that never had a chance.
None of this replaces uchikomi. The staircase stands on it. But a player whose whole diet is uchikomi and full randori is being asked to jump a gap with nothing in between, and the gap is where throws go to die. The companion guide prints this bridge as a worked block, with the formats dosed, a diagnostic for finding the exact link where a throw died, and the repair protocol that rebuilds it.
Section 04Etiquette and Safety Are the Operating System
Randori runs on trust, and the trust has working parts. Bow to your partner. Agree the form and the intensity before the first grip, out loud, in words. Match the partner in front of you, because the senior sets the level for the junior and a round that hospitalizes a beginner has taught nobody anything. Control the landing of every throw you complete, and pull up on the finish for a partner whose ukemi you are not sure of. When your partner taps, on the mat, on you, or with a voice, everything stops at once. Submissions go on slowly and come off instantly. Armlocks in judo act on the elbow only.
The space rules matter as much as the partner rules. Watch the edge of the mat and the pairs near you. When pairs collide, stop, separate, and restart. The pair on the ground has the right of way. And the oldest rule of all: nobody wins randori. The goal of the round is that both of you can train again tomorrow, a little better than today. A dojo that follows Jita Kyoei, mutual welfare and benefit, is not being polite. It is protecting its own training supply.
Section 05How to Lose Productively
You will be thrown in randori. Often, at first, by everyone. The players who improve fastest are not the ones who resist that fact hardest. They are the ones who extract the lesson each fall carries.
A productive loss has a shape. You notice one thing, not ten: the grip that was already lost before the throw started, the step you took backward, the entry you began and then abandoned halfway. You name it to yourself in one sentence. Then you go again, watching for that one thing. The journal in the companion guide is built around exactly this, one observation per round rather than a fog of disappointment.
Being thrown cleanly is also a skill you are giving your partner. Take the fall well, stand up, bow with your eyes, and go again. The partner who falls well gets invited back for the good rounds. The partner who fights every landing, posts arms, and twists out of completed throws stops being asked, and their randori diet shrinks to the partners nobody else wants either.
Section 06Plateaus: Causes and Fixes
Almost every developing player hits a stretch where randori stops improving. The causes are few, and each has a specific fix rather than a motivational speech.
| Plateau cause | What it looks like | The fix |
|---|---|---|
| One throw, one grip | Your tokui-waza works on new students and nobody else | Spend a month attacking only with your second and third throws, and let the favorite rest |
| Defending by stiffness | You stop most throws and land none of your own, arms locked straight | Light randori rounds where stiff arms are banned by agreement. Movement replaces the wall |
| Grip fighting skipped | Your throws start from whatever grip you happened to get | Grip randori rounds, and one named grip target per week in normal rounds |
| Ukemi fear | You avoid being thrown, so you avoid attacking near stronger players | Throw for throw with trusted seniors, where being thrown is the scheduled event, not the accident |
| No record kept | Every session feels the same because last month's problem is forgotten | The journal. One line per round, reviewed monthly, turns a fog into a list, and a list into fixes |
| Partner pool too narrow | You train with the same two people and learn their habits, not judo | Rotate deliberately. Smaller, bigger, left-handed, cautious, aggressive. Each one exposes a different hole |
Section 07Randori and Shiai Are Not the Same Thing
Shiai is contest: a referee, a clock, scores, penalties, and a winner. Randori has none of those, on purpose. In shiai you hide your second-best throw because the contest punishes experiments. In randori the experiment is the point, and the throw you are worst at is the one that needs the rounds. Players who turn every randori into shiai win Tuesday nights and stall for years. Players who use randori as the laboratory and shiai as the occasional exam keep improving long after the Tuesday champions have quit. Contest is a test of the judo you have. Randori is where you get more of it.
Section 08Common Mistakes
- Keeping score in your head. The count you are keeping is against the wrong opponent. It also makes you predictable, because you reach for your safest throw whenever the imaginary score tightens.
- Muscling through failed entries. A defended throw followed by force teaches your body that entries fail and effort fixes it. Reset, re-grip, and read the defense. The combination is behind it.
- Judging a throw by uchikomi alone. A throw that has never survived a moving partner, a finished nage komi set, and a constrained round has not failed in randori. It has never been built for randori.
- Only training down. Comfortable rounds against weaker partners feel like progress. They are maintenance at best. Most of your growth lives in rounds where you are the second best player on the mat.
- Avoiding the ground. Every standing round ends somewhere. Players who bail out of newaza whenever a throw fails are training half the art and doubling their panic.
- Going hard after being thrown. The revenge round is where injuries breed. A throw conceded cleanly is finished. The next exchange is a new one.
Section 09The Companion Guide
This article gives you the knowledge. The companion guide turns it into training. Randori Training Plan builds a 12 week development plan in three stages, with weekly checkboxes, the round formats with times for every stage, partner matching guidance for size, experience, and stance, a printable randori journal with per-session prompts, monthly review questions, and safety gates between the stages that your instructor signs off before you move up, in the same style as the First Month plan in this series. It also prints the bridge block this article describes: the named situational randori formats that close the uchikomi gap, with doses and reset rules, a throw-landing diagnostic that finds the exact link where a throw died, and the uchikomi repair protocol that rebuilds the throw link by link. It is for the beginner who has finished their first month and keeps asking the right question: randori is clearly the point, so how do I get good at it on purpose instead of by accident?
- Randori is the laboratory of judo, not a contest with the scoreboard off. Its job changes by stage: calm and ukemi first, then throw development, then tactics under pressure.
- The forms are tools. Yakusoku geiko and throw for throw build throws. Light randori builds timing. Full randori tests everything at once. Grip and newaza rounds isolate the parts.
- Throws die between uchikomi and randori for named reasons: a partner standing still, grips given instead of won, no movement to borrow, real counters, and first throw or nothing thinking. Moving uchikomi, nage komi, and constrained rounds are the staircase across that gap.
- Etiquette and safety are the operating system, not decoration: agreed intensity, controlled landings, instant release on the tap, and both partners able to train tomorrow.
- Losing productively is a method: one observation per round, written down, reviewed monthly. Plateaus have named causes and named fixes.
- Shiai tests the judo you have. Randori is where you get more.
Related: Kodokan Judo: An Instructor's Overview Related: The Grip Fight: Kumi-Kata for the Developing Player Related: Judo for Beginners: Your First Month on the Mat