Japan will invest $550 billion in the U.S. and allow the U.S. to tax Japanese goods sold in America at 15 percent.

A day after the United States reached a trade deal that imposes a 15 percent tariff on imports from Japan, President Donald Trump declared that U.S. business would “BOOM.” But early reads from auto analysts paint a murkier picture — if anything, some experts say, Japanese companies may benefit more than their rivals for now.