Yasaka has produced the Rakza series, a rubber line built for a strong spin and offensive play style. Rakza X Soft, using the same topsheet as Rakza X incorporates a softer sponge. This increases control but Rakza X Soft is among the most powerful rubbers with a sponge of this hardness. Considering it has the same topsheet as the original Rakza X, it has very high grip and dwell time to prevent ball slippage.