The Samegawa Oroshi (grater) is made from shark skin and is traditionally used to grate wasabi. Shark skin has finer teeth than the surface of a typical grater, which produces a super-fine grating of wasabi that has a high content of air pockets, therefore maximize the essential flavors of wasabi roots. This fine samegawa oroshi by Sakai Takayuki is made of high-quality shark skin and natural wood.