Simply put, jujutsu (meaning “gentle art”) is any Japanese-based unarmed martial art that focuses heavily on joint manipulation and throwing techniques rather than striking. The Korean equivalent of jujutsu is yusul, and the Chinese equivalent is qin na. Regardless of origin, the idea of using “soft” techniques rather than “hard” striking gives one a great advantage... Jujutsu is one of the most effective self defense styles, because it allows anyone to subdue an attacker regardless of size!
This is why it’s great for children! If an adult is trying to abduct a child, they can use their jujutsu training to break free of the hold and throw their attacker, giving them a chance to escape. Most children do not have enough power to effectively punch or kick an adult to fight them off, but jujutsu does not rely on strength. Instead, all jujutsu techniques rely on biomechanical principles that the body must follow. Regardless of size, a child can easily off-balance an attacker and throw them if they know how to (and have been practicing regularly with training partners of larger size).