“Kuzushi” is the concept of off-balancing. It refers to a tactic of getting your opponent out of a fixed position where he’ll be vulnerable, maybe getting his weight tilted too much to one side or making him overcommit to a move. With kuzushi, you aren’t achieving anything; you’re opening up a window of opportunity. Window ajar, you have a split second to advance your position. A sweep or submission attempt that would’ve been impossible under normal conditions suddenly works against an unbalanced opponent.