"Randori, meaning "free exercise", is practiced under conditions of actual contest. It includes throwing, choking, holding the opponent down, and bending or twisting his arms or legs. The two combatants may use whatever methods they like provided they do not hurt each other and obey the rules of Judo concerning etiquette, which are essential to its proper working."
Randori (乱取り?) is a term used in Japanese martial arts to describe free-style practice. The term literally means "chaos taking" or "grasping freedom," implying a freedom from the structured practice of kata. Randori may be contrasted with kata, as two potentially complementary types of training.
The exact meaning of randori depends on the martial art it is used in. In judo, jujitsu and Shodokan Aikido, among others, it most often refers to one-on-one sparring where partners attempt to resist and counter each other's techniques.