"The fact that the summit took place without a breakdown can be regarded as a positive factor," Sato told AFP.
"But we will have to keep an eye on the two countries for now as they have just begun the process." US President Donald Trump said there had been a "lot of progress" in his talks with North Korea's leader Kim Jong Un, before the pair signed a document together.
The first-ever summit between sitting leaders of the two foes went "better than anybody could have expected", said Trump, who is scheduled to hold a news conference later in the day.
"Stocks this week will face a series of events... namely the US-North Korea summit and central bank meetings in Japan, the US and Europe," Masayuki Toshida, senior market analyst at Rakuten Securities, said in a commentary.
"In addition, worries over trade frictions caused by protectionist US economic policy still linger," he said.
The direction of the market could change dramatically depending on developments in these events, he said.
In Tokyo, market heavyweight Fast Retailing, the operator of Uniqlo casual clothing, was up 1.13 percent at 50,840 yen.
The dollar fetched 110.28 yen in Asian afternoon trade, against 110.02 yen in New York late Monday.
Global equity markets rose Monday as traders brushed off a chaotic Group of Seven meeting to focus instead on the Trump-Kim summit.
The Dow Jones Industrial Average finished up less than 0.1 percent, while the tech-rich Nasdaq Composite Index gained 0.2 percent.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)