Judo was developed in the 19th century from a number of jujitsu methods. Initially it was separated into two distinct practices, one for self-defense and one for physical conditioning. These days, judo is practiced mainly as a sport, which has competitions and tournaments worldwide. The main techniques of this art are throwing and grappling. Judo fighters spend much of their training in learning how to fall safely when they are thrown, to minimize their risk of injury.
I played judo for close to ten years & I have trained at Sensei Shiina's place for the majority of the time. Recommend the place if you want to learn Judo.