Uraken Mawashi Uchi is a technique in Kyokushin karate. It translates to 'Back Fist Roundhouse Strike.' This technique involves delivering a circular strike with the back of the fist. The term 'Uraken' refers to the back fist, 'Mawashi' indicates a roundhouse motion, and 'Uchi' refers to the strike. It is commonly used to target the head, temple, or side of the opponent's torso with significant force.