Jodan Ryotoken Tsuki is a technique in Kyokushin karate. It translates to 'Upper-Level Double Fist Punch.' This technique involves simultaneously punching with both fists targeting the opponent's upper body or head. The term 'Jodan' refers to the upper level, 'Ryotoken' indicates both fists, and 'Tsuki' refers to the punching motion. It is commonly used to deliver a powerful and quick attack to overwhelm the opponent's defense and create openings for further strikes or combinations.