A Japanese textile company that’s potentially on the hook for hundreds of millions of dollars in a fraud suit is vigorously fighting the U.S. Justice Department and a whistleblower, setting up the potential for a rare trial under the False Claims Act.

DOJ consumer protection lawyers and the attorneys for Toyobo Co. Ltd., represented by a team from Weil, Gotshal & Manges, said in court papers filed in Washington this month that there has been no discussion about a settlement of claims rooted in the manufacture of the synthetic fiber Zylon for use in body armor.