Seiken Jodan Juji Uke is a technique in Kyokushin karate. It translates to 'Forefist High-Level X Block.' This technique involves executing a blocking motion with the forefists crossed in an X shape to defend against high-level attacks. The term 'Seiken' refers to the forefist, 'Jodan' indicates the high level, 'Juji' means cross, and 'Uke' refers to the block. It is commonly used to deflect punches or strikes aimed at the head or upper body.