Ginger graters are made for effectively mincing the irregularly-shaped root. They come in more than one design, one of which is a rounded ceramic dish with dull teeth in the center.
Ginger graters are easy to clean since the surfaces can be easily wiped down, one's fingers can scrape out any excess ginger, and they are dishwasher safe.
These handy tools don't have to be reserved for mincing ginger. They also work well when grating garlic cloves, achieving fine chocolate shavings, or shredding hard cheeses.