Judo vs Jiu-Jitsu

How Judo and BJJ Differ in Practice

Shared Roots, Different Paths

Both arts trace back to Jigoro Kano, who systematised judo in Japan in 1882 from earlier jujutsu traditions. Kano's student Mitsuyo Maeda emigrated to Brazil in the early 1900s and began teaching his grappling system there. Carlos Gracie and his family absorbed Maeda's teachings and, over several decades, refined and extended the ground-fighting elements, eventually creating what became known as Brazilian Jiu-Jitsu. For a fuller account of how BJJ developed, see our BJJ history page.

From this shared trunk, the two arts grew in very different directions. Judo moved toward a competition-focused, Olympic sport with strict rules that limit groundwork to brief windows of opportunity. BJJ built an entire curriculum around those ground moments, developing guard systems, positional hierarchies, and submission chains that have no equivalent in modern competitive judo.

Throwing vs Ground Fighting

In judo, the throw is the centrepiece. Techniques such as seoi-nage (shoulder throw), uchi-mata (inner thigh throw), and osoto-gari (outer leg reap) are practised thousands of times until they become second nature. A single clean throw can win a match immediately with ippon. The IJF ruleset limits groundwork: if neither competitor is actively working toward a submission or pin within a few seconds of going to the ground, the referee stands them back up.

In BJJ, the throw or takedown is treated as the entry point to the real contest. Once the fight reaches the ground, the match can continue for the full time limit as both competitors work through positions. Guard play, guard passing, sweeps, and submissions are the primary scoring and finishing mechanisms. If you want to improve your takedown game specifically within BJJ, our takedowns guide covers the most useful throws and single-leg attacks for grapplers.

Submissions and Legal Techniques

Judo competitions under IJF rules permit arm locks (specifically elbow locks such as juji-gatame) and strangles (chokes such as hadaka jime and okuri-eri-jime). Leg locks, wrist locks, and spine locks are prohibited at most competition levels for safety reasons. This keeps competition judo relatively clean in terms of technique variety, but limits the submission game considerably.

BJJ competition rules, as defined by the IBJJF, permit a broader range of submissions that expand as competitors advance through the belt system. White and blue belts compete without leg locks below the knee. Purple belts may use straight ankle locks. Brown and black belts may use reaping knee locks and more advanced leg entanglements. The ADCC (Abu Dhabi Combat Club), the premier no-gi grappling competition, allows heel hooks and other advanced leg locks across most divisions and is considered the highest-prestige grappling event in the world.

Training Culture and Pace

A judo class typically begins with ukemi (breakfall) practice, moves through uchi-komi (repetitive throw drilling without completing the throw), then randori (free practice). The emphasis is on explosive, whole-body movement and timing. Injuries from landing incorrectly are a real consideration, so ukemi training is taken seriously from day one.

A BJJ class usually begins with a warm-up, then a technique demonstration and drilling phase, followed by positional sparring (drilling from a specific position) and finally free rolling. The pace on the ground is more measured than a judo throw, which makes early training feel safer for many beginners, though the volume of pressure and resistance in rolling is still significant. See our what is BJJ guide for a full walkthrough of what to expect in your first classes.

Combining Judo and BJJ

The most complete grapplers are those who can both throw and finish on the ground. Many BJJ practitioners at purple belt and above seek out judo training specifically to address the takedown gap in their game, and many judoka cross-train in BJJ to improve their ne-waza and submission awareness.

If you are based in Thailand and want to add judo to your BJJ training, contact the Thai Judo Association or check with your BJJ academy, as some run regular judo crossover sessions or can direct you to a nearby club. The investment in learning basic hip throws and foot sweeps pays off quickly in BJJ competition, where takedowns are worth two points under IBJJF rules and most practitioners default to pulling guard rather than fighting for the throw.

Conversely, if you train judo primarily and want to fill the gaps in your groundwork, even a few months of BJJ training will dramatically improve your ability to capitalise on the ne-waza windows that competition judo permits.