Against the backdrop of Mount Paektu, a dormant volcano symbolising Korean nationhood, she said Kim had met Lee Hsien Loong, Singapore's prime minister, and would hold talks with President Donald Trump.
"We've got a very interesting meeting in particular tomorrow", Trump said at a luncheon with the Singapore prime minister on Monday.
The meeting was briefly canceled by Trump.
The US leader has whipsawed on expectations for the meeting, signalling that it could be the beginning of a "process" of several meetings, only to call it a "one-time shot" for peace as he embarked for Singapore.
The North Korean leader shook hands with Singaporean Foreign Minister Vivian Balakrishnan shortly after arriving at Singapore's Chagi airport.
When asked how he feels about the summit after landing in Singapore on Sunday afternoon, US President Donald Trump said, "Very good".
North Korea's state-owned newspaper Rodong Sinmun announced the summit to its people on Monday, saying the talks would focus on 'establishing new DPRK-U.S. relations... building a durable peace-keeping mechanism on the Korean Peninsula...realizing the denuclearization of the Korean peninsula and other issues of mutual concern'. -North Korean leaders' meeting.
Trump and Kim touched down on a sweltering early summer day in Singapore, the city-state founded in the early 19th Century as a British colony because of its position at the intersection of sea lanes between Europe and Asia.
The United States and North Korea have been in a technical state of war for decades after the eruption of the 1950-1953 Korean War, which pitted U.S. -led U.N. troops backing Seoul against Pyongyang's forces that were aided by China.
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While the main attraction of the summit will inevitably be the historic meeting between Trump and Kim, that wasn't the first world leader he met with on this trip.
For his part, Trump accused the summit host, Canadian Prime Minister Justin Trudeau, of lying, and threatened to end trade with G-7 nations that he said use unfair practices.
On Wednesday, the summit was declared an "Enhanced Security Special Event" by the Minister for Home Affairs under the Public Order Act.
Even if Kim offers only "a fine-sounding rhetorical commitment, and maybe a few missile surrendered or some site closures", he said, Trump will "market this thing as something extraordinary for his voters back home".
Trump was joined at the meeting with Lee by US officials including Secretary of State Mike Pompeo, White House Chief of Staff John Kelly and National Security Adviser John Bolton.
Despite the initial high stakes of a meeting meant to rid North Korea of its nuclear weapons, the talks have been portrayed by Trump in recent days more as a get-to-know meeting. But there are major doubts, given how hard it has been for Kim to build his program and given that the weapons are seen as the major guarantee to his holding onto unchecked power.
The previous United States stance, said Bruce Klingner of the Heritage Foundation, was that "we don't deploy a president to negotiate a treaty, we deploy a president to sign a treaty where we know where every piece of punctuation is on that piece of paper".
Any nuclear deal will hinge on the North's willingness to allow unfettered outside inspections of the country's warheads and nuclear fuel, much of which is likely kept in a vast complex of underground facilities.
Trump's administration has insisted that CVID is a foremost requirement that Pyongyang must meet for lasting peace on the Korean peninsula.