Trump also promised a "strong, deliberate and orderly withdrawal" of forces from Syria when he visited Al Asad Air Base in Iraq, where some US troops are stationed.
Trump has threatened Tokyo with potentially devastating tariffs on Japanese autos and parts. And he wants to have the issue settled quickly, "probably in August", he tweeted. But if he was serious about that deadline, he might be disappointed.
Trump's announcement has raised global concerns, with the European Commission urging the US and Russia to pursue talks to preserve the treaty.
Trump and Putin plan to meet one-on-one at the start of their first formal summit in Helsinki, Finland, on Monday afternoon, before allowing their aides to participate.
Trump, 74, plans to speak every day of the four-day convention, in contrast to his Democratic opponent, former vice-president Joe Biden, 77, who made brief taped appearances before his 20-minute acceptance speech last Thursday.
Trip.com, the company's international platform, now offers customer service in 19 languages and operates three overseas call centers in Edinburgh, Seoul and Tokyo.
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Trump said on Monday the US economy "may be" heading toward a recession and that the COVID-19 outbreak could last for months.
Trump and his wife, Melania, are scheduled to arrive in Tokyo on Saturday afternoon and the US president and first lady will stay at the Palace Hotel Tokyo, near the Imperial Palace in Tokyo's Chiyoda Ward.
Trump said in Washington on Monday that "we will be instituting a very critical step, and that will start right now. Today, the United States is designating North Korea as a state sponsor of terrorism".
Trudeau's Liberal party took most seats in Parliament, giving it the best chance to form a government. Still, falling short of a majority meant they would have to rely on an opposition party to stay in power.