Takeda Pharmaceutical Co. said it would contest $6 billion in punitive damages imposed by a jury in the United States in a case that accused Japan's largest drugmaker of concealing cancer risks associated with its Actos diabetes drug.

Eli Lilly and Co., Takeda's co-defendant in the case, was ordered to pay $3 billion in punitive damages by the jury in Louisiana on Monday. It also awarded $1.48 million in compensatory damages.

The $9 billion in punitive damages awarded by the jury against Takeda and Eli Lilly exceed the $5 billion penalty that a jury in Alaska previously imposed on Exxon Mobil Corp. following the 1989 Exxon Valdez oil spill.