Sujihiki Knives Sujihiki knives are basically western slicing knives that usually have a couple modifications. Sujihikis often have an asymmetrical edge and also do not have bolsters. Many have traditional Japanese handles on them and are called wa-sujihikis. These knives are liked by some because of their thin blades and versatile design. They are used as a replacement for a gyuto by some professionals and can be used to carve as well as fillet.