Uraken Oroshi Uchi is a technique in Kyokushin karate. It translates to 'Downward Back Fist Strike.' This technique involves delivering a powerful downward strike with the back of the fist. The term 'Uraken' refers to the back fist, and 'Oroshi Uchi' indicates a downward strike. It is commonly used to target the top of the head, nose, or collarbone of the opponent with significant force.