randori

Jigoro Kano founded the Kodokan school of judo in Tokyo in 1882 and immediately faced a philosophical problem: how do you train fighters safely without undermining the habits that make fighting effective? Kata, the fixed choreographed sequences inherited from jujutsu, were safe but stiff. Randori was Kano's answer. He defined it as free-form practice in which two partners attempt genuine throws without a predetermined script.

The word itself carries Kano's logic. Ran (乱) means disorder, turbulence, chaos. Tori (取り) means taking, grasping. Together they name an act of seizing within chaos, of finding purchase in a situation that has no fixed handholds. This was deliberate: Kano believed judo's ethical purpose was to teach practitioners to handle the unexpected with composure, and randori was where that composure was earned, not described.

Kano sent his students abroad to demonstrate judo in the 1890s and early 1900s. Yoshitsugu Yamashita taught at the Naval Academy in Annapolis in 1903; Mitsuyo Maeda settled in Brazil in 1914 and taught the family that would create Brazilian jiu-jitsu. Randori traveled with every demonstration because it was both training method and proof: two practitioners moving at full speed, neither hurt, both improving. By the 1932 Los Angeles Olympics, judo was visible enough that American gym culture had the word.

English absorbed randori without translating it because no equivalent existed. 'Sparring' implies striking; 'drilling' implies repetition; 'rolling' is informal. Randori names something specific: resistant, alive practice against an unpredictable partner, governed by rules that make the chaos safe but not easy.