The finish was nearly right. What was missing was the order this family is taught in: the arm recognised, the arm controlled, pressure last and slow, and a tap that had time to exist. Kansetsu-waza (joint techniques) done in that order are ordinary, trainable judo. Done in the other order, they are how elbows get hurt in rooms that should know better.
Section 01The Elbow Is the Whole Target
Kansetsu-waza is the armlock half of katame-waza (grappling techniques), alongside the pins and the strangles this library treats in their own pieces. Under judo rules, joint techniques target the elbow only. That is a rule worth saying plainly at the start, not as a footnote. Shoulders, wrists, and knees are outside this family as judo teaches and contests it, and a player who drifts toward them has left the technique, not improved it.
The elbow is a hinge. It bends one way and resists the other. Every armlock in this article does some version of the same job: it holds the arm so the hinge cannot fold out of trouble, then applies pressure against the hinge's grain, in degrees. The joint gives clear signals while there is still room. Pain arrives, the arm feels stretched and wrong, and the tap belongs there, early, while the receiver still owns their arm completely. Pressure built slowly gives those signals time to work. Pressure snapped on skips them, and the first clear signal can be the injury itself.
That single fact organises the whole piece. Recognition before application. Control of the arm before pressure on the joint. The tap as the technique's completion, not its interruption.
Section 02The Tap Is the Completion
Say it the way the strangle piece in this library says it, because the contract is identical. A tap ends the technique in the same motion it is felt. Hand on the mat or the partner, a clear word, a foot struck down when both hands are trapped: all three are full taps, and the release follows at once, the grip opened, the pressure gone, the arm given back.
Tap early is a drilled skill here, not a slogan. A player who has only ever tapped to a fully stretched arm has trained themselves to wait, and waiting is where the damage window lives. The receiver taps at the first honest certainty that the lock is set and the arm is no longer theirs to recover. That tap is the technique completing. The partner applied control well enough that the end was obvious before it was dangerous, and the receiver read it in time. Both halves deserve the credit.
The applying player carries the slower half of the bargain. Build in degrees. Watch the partner, not your own hands. Never chase a finish that the control has not already earned, and never, under any circumstances, keep pressure on through a tap to find out if it was real. It was real. It is always real.
Section 03The Family, Named
Five names make up the family as this article teaches it. One is the worked example. One sits behind a fence. Learn which shelf each name lives on before drilling any of them.
| Technique | Gloss | The picture in one line | Shelf in this article |
|---|---|---|---|
| Ude-garami | Arm entanglement | The arm bent, your figure-four grip turning the elbow line against its grain | Taught, with its control standard |
| Ude-hishigi-juji-gatame | Cross armlock | The arm straight between your legs, hips under the elbow, the classic finish | Worked example, taught in full |
| Ude-hishigi-ude-gatame | Arm-crushing lock | The arm straight, pressed and controlled between your hands and body from above | Taught, with its control standard |
| Hiza-gatame | Knee armlock | The arm laid across your knee as the fulcrum, hands controlling the wrist end | Taught, with its control standard |
| Waki-gatame | Armpit armlock | The arm held across your side and armpit as you drop or turn | Ground form taught; standing form knowledge only |
Juji gatame is the worked example because it is the finish a judoka is most likely to land, off a failed throw, out of a turnover, or from a partner who posts an arm while defending a pin. Its picture teaches the family's grammar in the clearest form: the arm isolated, the elbow line found, the hips placed as the fulcrum, the legs controlling the body so the arm cannot be pulled home, and only then pressure, upward into the elbow with the thumb line pointing the way your coach teaches, in degrees the tap can beat.
Read the other taught names through that grammar. Ude-garami bends the arm instead of straightening it, so the control problem is the bent elbow and the shoulder staying down. Ude gatame works from above on a straight arm, so the control problem is your weight placement stopping the roll-out. Hiza gatame swaps the fulcrum to the knee, so the control problem is the wrist end and the angle across it. Different pictures, same order: recognise, control, then pressure.
Section 04Waki-Gatame: The Honest Fence
Waki-gatame needs its own paragraph because it has two lives. On the ground, applied in its controlled form with the partner already down and the drop removed, it is a trainable armlock like the rest of the family, and the companion reference cards it that way.
Standing is different. The standing version finishes by dropping your weight with their arm trapped across your side, which means the pressure arrives all at once, driven by a falling body, at an elbow whose owner is also falling and may post, twist, or land on it. That is the version where elbows get hurt, in drilling as much as in contests. In this library the standing application is knowledge only. Know the name, know the picture, know why rooms restrict it. Do not drill it, do not finish it, and do not let a partner try it on you to see how it feels. The ground form carries everything this technique has to teach about control. The standing form mainly teaches how fast an elbow can be injured, and nobody needs that lesson firsthand.
Section 05Defence Is Half This Piece
A player who can only finish armlocks is a hazard with a short career. A player who can defend them can train the family for years, which is why the companion reference pairs a defence card with every finish card and gates the finishes behind the defence.
Recognition Comes First
Armlocks announce themselves early, at the hands and the posted arm. Your arm stretched away from your body with a partner's legs arriving around it is juji gatame starting. Your wrist held with both of a partner's hands while their body turns is ude-garami starting. A straight arm pinned under a partner's chest or across a knee is the other two names starting. The defence begins in that first second, while the picture is still a grip and a position, not a lock. Answer there and most finishes never form.
Keep the Arm Home
The elbow that stays close to your own ribs is hard to isolate. The arm that posts wide, reaches across a partner's body, or stays straight and offered during a turnover is the arm that gets taken. Defence at this level is housekeeping: recover the elbow to your side, bend the arm when it is being straightened and straighten nothing for free, and keep your weight where your arm is not the only thing holding you up. Post to move, then take the post back. A post that stays becomes a handle.
The Escape Pictures
Each finish has its drilled answer, and the reference teaches them name by name. The shared shape underneath them is worth knowing here: escapes work before pressure, not after it. Turn toward the trapped arm where the card says turn, stack or roll where the card says stack, and free the elbow line before you try to free the hand, because the hand is what they are holding and the elbow is what is in danger. Once pressure is genuinely on, the escape is the tap, delivered early and clearly, and using it counts as the system working. The player who taps at the first certainty and takes the next round has defended everything that matters.
Section 06The Staged Gates, in Order
No finish in this family is earned by grade, time served, or enthusiasm. The gates are the qualification, in this order, and a coach can hold any player at any gate for as long as the work needs.
Gate one: recognition and defence. You can name each picture as it forms, keep the arm home, and run each finish's defence against a cooperative partner at drilling speed. No pressure beyond the structure being shown.
Gate two: tap fluency. You tap early, clearly, and in every channel, and you release in the motion you feel a tap when you are the applying partner in structure-only work. Both roles tested. A fast finish with a slow release fails this gate outright.
Gate three: controlled application. You isolate and control the arm fully before any pressure, build pressure in degrees against a defending partner at agreed levels, and stop at the tap in the motion you feel it.
Gate four: randori. Groundwork randori only, with partners who have passed the same gates, at the room's agreed level for this material. The first night a player's release slows in randori, that player returns to gate three without argument. Gates go down as easily as they go up. That is what makes them gates.
Section 07Where It Goes Wrong
Pressure before control. The defining fault. The arm was never isolated, so the finish is a tug of war against a whole body, and somebody's elbow absorbs the argument. Stop, rebuild the control at drilling speed, and let a coach watch the rebuild.
Snapping the arm straight. Speed is not a substitute for the fulcrum. An arm yanked straight arrives at full stretch before the tap can form, which is the injury mechanism in its purest form.
Holding through the tap. The contract broken in its worst form. It ends a player's access to this work until a coach restores it, and in most rooms it ends partnerships for good.
Reaching and posting as a habit. A curriculum fault as much as a student fault: if nobody taught the arm-home habit, every turnover practice is quietly feeding the room's armlock players.
Drilling waki-gatame standing. The fenced version, attempted because it looked exciting. Knowledge only means knowledge only, for the keen student exactly as much as for the cautious one.
Treating the tap as losing. A room culture fault. The tap is the completion of the technique. Rooms that score it as weakness teach late taps, and late taps are the whole problem this article exists to prevent.
Section 08The Companion Guide
This article gives you the knowledge. The companion guide turns it into a reference a room can run. The Kansetsu-Waza Reference mirrors the shime-waza reference deliberately: the mechanism and the tap contract first, recognition and defence before any finish, then a card for each family member with its control standard printed ahead of its pressure standard, and the tap-early pass/fail line printed on the card itself.
Entries from pins and turnovers get their own cards, every finish is paired with its defence and recognition card, and waki-gatame is carded in its controlled ground form with the standing version fenced as knowledge only, exactly as it sits in this article. The gate ladder, the fault library, and the sign-off pages close the book.
- Kansetsu-waza targets the elbow only under judo rules. Drifting to the shoulder or wrist is leaving the technique, not improving it.
- The order never changes: recognise the picture, control the arm, then build pressure in degrees a tap can beat.
- The tap is the technique's completion. Tap at the first honest certainty, release in the same motion you feel it.
- Juji gatame is the worked example, and its grammar, isolate, fulcrum, control the body, pressure last, reads across the whole family.
- Waki-gatame's standing application is knowledge only in this library. Its controlled ground form is what gets drilled.
- Defence is half the subject: read the picture early, keep the elbow home, escape before pressure, and tap without delay when the lock has won.
Related: Strangles: Judo's Shime-Waza, Taught Carefully Related: Attacking the Turtle Is a Sequence Related: Not Getting Submitted in Your First Year