Toyota Motor Corp. rebuked U.S. President Donald Trump's declaration that imported cars threaten national security, signaling contentious talks are ahead for the White House and America's key trading partners.

In an unusually strong-worded statement, Japan's largest automaker said Trump's proclamation Friday that the U.S. needs to defend itself against foreign cars and components "sends a message to Toyota that our investments are not welcomed." The company said it has spent more than $60 billion building operations in the country, including 10 manufacturing plants.

Trump earlier Friday agreed with the conclusions of his Commerce Department, which investigated imports of vehicles and auto parts and found they harm national security by having led to a declining market share for "American-owned" carmakers since the 1980s. The White House set a 180-day deadline for negotiating deals with Japan, the European Union and other major auto exporters.