President Trump on Friday cleared the way for Japan-based Nippon Steel to potentially acquire U.S. Steel, though details about the structure of the deal — including a possible "golden share" held by the federal government — remain unclear.

The companies said they had entered into an agreement with the U.S. government to alleviate any national security concerns.

Nippon Steel plans to complete its purchase of U.S. Steel after reaching an agreement with the Trump administration to resolve national-security concerns. Plus: Warner Bros. Discovery bondholders approval company’s split.

In Tokyo, there’s concern — and more than a little trepidation — over what the Nippon Steel deal and doubled tariffs portend for the economic relationship.