Randori

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Randori (乱取り) is a term used in Japanese martial arts to describe free-style practice or sparring, sometimes with multiple attackers. The term literally means "chaos taking" or "grasping freedom," implying a freedom from the structured practice of kata.

The exact meaning of randori depends on the martial art it is used in. In judo and Shodokan Aikido, it most often refers to one-on-one sparring where partners attempt to resist and counter each other's techniques. In other styles of aikido, in particular Aikikai, it refers to a form of practice in which a designated aikidoka defends against multiple attackers in quick succession without knowing how they will attack or in what order. This form of randori is not sparring, and the attackers are not allowed to resist or attempt to counter the defender's techniques. It must be noted that the term is used only by Aikikai dojos outside Japan. In Japan, this form of practice is called Taninzu-gake(多人数掛け) which literally means multiple attackers.

Although in karate usually the word kumite is used for sparring, in some schools they also use the term randori for the "mock-combat" in which both karatekas move very fast, attempting and parrying acts of extreme violence with all four limbs (including knees, elbows, etc.) and yet never making other than the lightest contact. Total control of the body is necessary and therefore usually only the senior grades can practise randori. In these schools, the distinction between randori and kumite is that in randori the action is not interrupted when a successful technique is applied.

Randori may be contrasted with kata, as two potentially complementary types of training.