Nippon Steel has unveiled its plan for the management structure of US Steel if a planned acquisition goes ahead. It says it would give a majority of the board seats to US citizens.
Nippon Steel says it would also appoint Americans to key management roles.
The Japanese company is hoping to win greater support for the takeover through such efforts. Many in the US have expressed strong opposition.
The two firms agreed to the deal, worth around 14 billion dollars, last December. But labor unions have come out against it.
The issue has also featured in the US presidential election campaign.
Vice President Kamala Harris said on Monday that US Steel should remain American-owned and American-operated, calling it “vital” to the nation.
Former President Donald Trump has also expressed his disapproval.
One concern is that Nippon Steel would allow overseas products into the American market.
But the Japanese firm says it would give priority to products made domestically by US Steel.
Nippon Steel said in August it would invest an additional 1.3 billion dollars, hoping to strengthen its case.
The company says it believes a “fair and objective” regulatory review will support the benefits of the acquisition, and that it “looks forward to closing the transaction as soon as possible.”