Tesla Inc. led the Magnificent Seven lower in premarket trading, dropping as much as 10 percent.
Toyota currently builds cars in Japan and China, but expanding production to markets including the U.S., could hedge against tariff and foreign exchange risks and cut delivery times, the Nikkei reported.
President Donald Trump said he will impose an additional 50 percent tariff on China unless Beijing withdraws its retaliatory tariffs on the United States.
Honda's audit committee investigated the allegation and its board of directors was poised to take disciplinary action when Aoyama submitted his resignation.
This is the second workplace death at a Stellantis facility since August.