Dickson said he spent thousands of hours collecting Chinese export data, having it translated, and analyzing the information to assemble the evidence backing his lawsuit.
A lawyer representing Toyo Ink did not respond to a phone call and email seeking comment.
The Justice Department said the settlement shows it will pursue those who avoid paying the government what it's owed.
"Importers seeking access to United States markets must comply with the law, including the payment of customs duties meant to protect domestic companies from unfair competition abroad," Stuart F. Delery of the agency's civil division said in a statement.
Emery Dalesio can be reached at http://twitter.com/emerydalesio