The yen is often regarded as a "safe-haven" currency in Asia, attracting capital inflows during times of market distress that can spike its value for short periods, hurting exports.
The pact set to replace NAFTA outlines that if one of the partners enters a free trade deal with a "non-market" country such as China, the others can quit in six monthS.
A 37-year-old real estate tycoon married to Trump's daughter Ivanka, Kushner has the trust of his father-in-law, and crucially, is close to Lighthizer, a source with knowledge of the talks said.
'The agreement will govern nearly $1.2 trillion in trade, which makes it the biggest trade deal in the United States' history.'
The USMCA, signed on Sunday night, came in the final hours before the deadline for Canada to come on board a re-negotiated trilateral deal.
USMCA "greatly opens markets to our Farmers and Manufacturers" while reducing trade barriers "and will bring all three Great Nations closer together in competition with the rest of the world.
The United States-Mexico-Canada Agreement (USMCA) updates and replaces the nearly 25-year-old North American Free Trade Agreement (NAFTA)
While Trudeau has tried to keep his head down and avoid further antagonizing Trump, he also has stood firm in demanding a fair deal in the trade negotiations.
Trump vented his frustration with Canada during a news conference along the sidelines of the United Nations General Assembly, the latest sign of deteriorating relations between two allies.
Momentum appeared to have stalled last week in efforts to bridge differences between Washington and Ottawa in negotiations to rewrite NAFTA, which began last year.
Officials have been in talks nearly non-stop for a month as they try to overcome hurdles and agree on a NAFTA rewrite.
The trade talks came after US President Donald Trump said on Saturday that there is "no political necessity" to keep Canada in the new NAFTA deal.
The Congress must approve any rewrite of the North American Free Trade Agreement and might refuse to endorse a deal that leaves longtime ally Canada on the sidelines.
Trump's remarks raised doubts about whether the two countries can quickly reach a deal to keep Canada in the 24-year-old trading bloc, along with the United States and Mexico.
Optimism is high that the United States, Canada and Mexico are near the finish line for an agreement on a new North American Free Trade Agreement.