Copper grater has a long history because it keeps the moisture and nutrition of radish, citrus and wasabi. Established in 1949, Oya Seisakusho's craftsman makes these fine little prongs one by one. This grater is one of their most popular products, which is commonly used in homes and restaurants.
To clean the grater, rinse it with water and brush off the loose bits of fruits or vegetables gently, then dry with cloth. Please do not clean with dishwasher.