Tiger Manta Ray Wasabi Grater 下ろし器- (oroshiki)Oroshiki () are traditional graters used for grating fresh wasabi, ginger, Japanese yam, and horseradish roots. Typically made with shark skin, it's sandpaper like texture is the perfect abrasive for grating wasabi into an ultrafine paste. With Wasabi in particular, the friction that's created during this abrasive grinding process actually generates a lot of the spicy heat flavors synonymous with fresh wasabi. Grating fresh wasabi on a metal or