The Oya manufacture was founded in 1949 in Tokyo, Japan. It is a small company of 4 loyal craftsmen who produce the copper graters. Since 2007, the director, Shigeki Oya is also in charge of organizing and promoting the traditional crafts for the small companies at he Chamber of Commerce.
The sharp and deliberately irregular blades are made one by one by precise little hammer strokes on the copper surface. Copper stays the ideal material for cooking tools as it is sustainable and antibacterial.
This grater , identified since 1712 (Edo period encyclopedia) is part of the treasuries of Japanese cuisine.
The little grater for condiment is made out of copper by a Japanese old manufacture. It is a single-face grater that doesn't separate the fiber from the juice to preserve all the flavors. It is traditionally used for ginger, wasabi root, garlic and citrus zests.