A waza-ari is the second highest score a fighter can achieve in judo, the others formerly being a yuko (advantage) and a koka.
[1] In judo, a waza-ari is awarded after an action in which the opponent is thrown with control and accuracy, but not to the extent of an ippon, or held on the back for between 15 and 20 seconds on the mat.
To achieve an ippon, four elements are required: landing the opponent with a judo technique on the mat flat on the back, with force, speed, and control.
[5][6] In the shobu ippon kumite practiced by the Japan Karate Association and its offshoots, waza-ari is awarded when a strike makes contact with the opponent but without fulfilling all of the criteria for a decisive strike, either due to the target area, distance, focus or other judging criteria.
[7][8] In knockdown kumite as practiced by offshoots of the kyokushinkaikan organizations, waza-ari is awarded for a blow that temporarily stuns the opponent but does not render them unable to continue for longer than three seconds.