Amazon.com: Chojiro Wasabi Grater 5 Large: Home & Kitchen
Japanese knives | Japanese Grater with Shark Skin for Wasabi [Middle]
Real wasabi is grated with light pressure in a circular motion on an oroshigane grater. The grating surface is made of dried shark skin Stock Photo - Alamy
SHARK SKIN GRATERS - New York Mutual Trading Co., Inc.