Shuto Sakotsu Uchi is a technique in Kyokushin karate. It translates to 'Knife-Hand Collarbone Strike.' This technique involves striking with the knife-edge of the hand (shuto) targeting the opponent's collarbone. The term 'Sakotsu' specifically refers to the collarbone, and 'Uchi' denotes the strike. It is commonly used in close combat situations to deliver precise and debilitating blows to a vital area, potentially incapacitating the opponent.