Sport guide
Youth and beginner judo tournaments
Updated June 2026
By Roger Aspelin
Organising a judo competition for young athletes or adult beginners is fundamentally different from running a senior open. Weight class structures, match lengths, technical restrictions, and group formats all change — and vary significantly between countries and federations. This guide covers the principles and the Swedish Judo Federation (SJF) as a concrete example.
Fixed vs floating weight classes
Senior and cadet competitions use fixed weight categories: -66 kg means every athlete between roughly 62 and 66 kg competes together, regardless of whether there are 2 or 30 of them in that class. The groups are predetermined and published before weigh-in.
Younger age groups typically use floating weight classes instead. Here, the groups are not defined until after weigh-in. All athletes are sorted by weight and then divided into groups of typically 3–5 competitors, with a rule that the heaviest and lightest athlete in any group may not differ by more than 10%. The organiser forms the groups, rather than the scale deciding them in advance.
The reason floating weight classes exist is primarily to remove weight focus in young children. A 7-year-old should not be anxious about whether they weigh 31 or 32 kg on competition day. Who they compete against is not predetermined, so the weight on the scale has no strategic significance. Competition should feel fun and safe — not like a weigh-in drama.
Floating groups are also more flexible for organisers. You can form groups that consider more than just weight: grade (kyu level), club, country of origin, and at club events sometimes personal development factors. Keeping club members apart in their first group, or matching athletes at the same grade level, is far easier with floating groups than with rigid fixed categories.
Age groups and rules in Sweden (SJF)
The Swedish Judo Federation divides youth competition into the following age groups. Rules and formats differ at each level.
Rules for U9–U15 differ between countries. The above reflects SJF practice. Always verify with your national federation before publishing your event bulletin.
Adult beginner classes
Many events offer a beginner class for adult competitors — often limited by belt grade (for example, maximum orange or green belt). Floating weight classes are common in beginner categories for the same reasons as in youth competition: the focus is on participation and a positive first experience, not on weight management.
A belt-grade ceiling is typically set in the event bulletin. This keeps the technical level of matches roughly equal and avoids a situation where a strong blue belt is competing against true beginners. Grade limits vary by event — check with the organising federation or define the limit clearly in your own bulletin if you are running the event.
Round robin pools are the standard format for beginner classes. Repechage formats are rarely used — the goal is to give every entrant multiple matches in a single pool rather than an elimination bracket with a second chance.
Forming floating groups after weigh-in
For smaller beginner tournaments — especially for young children — the official weigh-in can be replaced by a lighter process. Coaches or clubs weigh their athletes in advance and declare the weight at registration. If you want to verify accuracy, you can spot-check a random selection of participants. This reduces morning logistics significantly and keeps the atmosphere relaxed for children competing for the first time.
After all athletes in a floating-weight category have weighed in (or declared their weight at registration), the organiser sorts them by weight and forms groups. The process:
- 1Sort all athletes in the category by weight, lightest to heaviest.
- 2Divide into groups of 3–5. Target group size depends on age group and event length — 4 or 5 is typical for U13 and U15, 3 or 4 for U9–U11.
- 3Check that the heaviest athlete in each group is no more than 10% heavier than the lightest. Adjust group boundaries as needed.
- 4Where possible, separate athletes from the same club into different groups. If unavoidable, schedule their match as the first match of the group (see the round-robin draw principles guide).
- 5Consider grade level — pairing two complete beginners against more experienced athletes in the same group is avoidable if you have enough flexibility.
- 6Finalise and publish the draw. Athletes should see their group before competition begins.
At club level there is often flexibility — the goal is fair and safe matches, so use your judgement if the 10% rule creates awkward groups with very few participants.
A specific situation to watch for: when the heaviest athlete in an age group weighs significantly more than the next heaviest, forming a safe group becomes difficult or impossible. In that case, a practical option is to offer the athlete the opportunity to compete in the next higher age group instead. This applies to regular youth competitions as well, not only beginner events. Always respect the dispensation rules of your federation — some require formal approval before an athlete can compete outside their age group.
Match length by age group
Match duration varies by age group and federation. The values below reflect common SJF practice. Always verify with the applicable competition rules.
Match times vary between federations and event levels. Verify with your national federation before publishing.