Shuto Mawashi Uke is a technique in Kyokushin karate. It translates to 'Knife-Hand Roundhouse Block.' This technique involves executing a circular sweeping motion with the knife hand to block incoming attacks. The term 'Shuto' refers to the knife hand, 'Mawashi' indicates a roundhouse motion, and 'Uke' means block. It is commonly used to deflect strikes aimed at the midsection or head with a strong sweeping motion.