Japan's promised $550 billion in U.S. investments under the trade deal struck last month will be determined by whether they will benefit Tokyo too, the Asian nation's top tariff negotiator said on Tuesday.

Toyota, Honda and Nissan forecast big hits to their profits despite a trade deal that cut auto levies to 15 percent. The reduced rate has yet to be implemented.

The deal imposes 15% tariffs on Japanese cars and other goods, one of the more favorable rates. While the start date and other basic elements are still unknown, Treasury Secretary Scott Bessent warned this week that the US would monitor implementation and bump the rate up to 25% if Trump isn’t satisfied.