The Duo System is a discipline in which a pair of jutsukas from the same team show possible self-defense techniques against a series of 12 attacks, randomly called by the mat referee to cover the following scenarios: grip attack (or strangulation), embrace attack (or necklock), hit attack (punch or kick) and armed attack (stick or knife). The Duo System has three competition categories: male, female or mixed, and the athletes are judged for their speed, accuracy, control and realism. It is arguably the most spectacular form of ju-jitsu competition and it requires great technical preparation, synchronism and elevated athletic qualities.






