A martial art over 2,000 years old. Hundreds of styles exist, but most of them incorporate striking, throwing, fall breaking, and locking. Popular styles include Small Circle Jujitsu, Aiki-Jujitsu, and Danzan Ryu Jujitsu, among others. There is also a sport variation of it, known as Judo. Jujitsu translates into the "gentle" or "soft" art, named so because of its use of energy rather than brute strength. It is also spelled jiu-jitsu, jujutsu, or a variation on any of those.