Uraken Shomen Ganmen Uchi is a technique in Kyokushin karate. It translates to 'Back Fist Front Face Strike.' This technique involves delivering a strike with the back of the fist to the opponent's face in a forward motion. The term 'Uraken' refers to the back fist, 'Shomen' indicates a frontward direction, and 'Ganmen Uchi' refers to the strike to the face. It is commonly used to target the nose, jaw, or chin of the opponent.