They had "walked side by side to Hanoi", where the summit was taking place, and were "continuing great dialogue", he added. "No rush. We just want to do the right deal."North Korea has conducted no nuclear or intercontinental ballistic missile tests since late 2017".
Asked by a USA reporter Thursday in Hanoi whether he's willing to denuclearize, Kim responded: "If I'm not willing to do that, I won't be here right now".
Evans Revere, a former USA negotiator with North Korea, said Trump was under pressure given his domestic problems and " Kim may be tempted to push Trump even harder for concessions, knowing how much the president wants and needs that testing pause".
The demeanour of both leaders as they sat in Hanoi's Metropole Hotel was largely sombre even though both professed to hopeful about future ties. Such an office would mark the first USA presence in North Korea and a significant grant to a country that has always been deliberately starved of global recognition.
The tone between the two men changed markedly over the next few months. Mr Kim did not answer.
- What may Mr Trump demand in the face of rising domestic turmoil?
They have also discussed partial denuclearisation measures, such as allowing inspectors to observe the dismantling of North Korea's Yongbyon nuclear reactor, US and South Korean officials say. "This isn't like dealing with Trump".
"Speed is not important", Trump said.
Accompanied only by translators, the unlikely pair - a 72-year-old billionaire and a 35-year-old reclusive autocrat - displayed a familiarity with one another as they began the day's negotiations.
Looking relaxed but appearing to say little, they indulged in a poolside stroll Thursday around the gardens of the luxury Metropole Hotel, a Colonial-era building that has played hosts to stars ranging from Charlie Chaplin to Brad Pitt.
"Let me assure you I will do my best to bring a good result ultimately today", Kim said. Speaking through an interpreter, Kim said he is "confident of achieving the great results that everyone will welcome".
"If the exchange is going to be economic help to North Korea. without really any tangible evidence of a denuclearization ... then I'm afraid that that really is playing into what exactly Kim Jong-un wants", said William Arkin, a military analyst and columnist for the Guardian.
"I'm sure that all of them will be watching the moment that we are sitting together side by side as if they are watching a fantasy movie".
President Trump is allegedly to leave the summit venue about thirty minutes after that, . before which we may hope for some more quality time between the two leaders.
Asked by a member of the White House press pool about his outlook for Thursday's summit, Kim said: "It's too early to say".
Trump and Kim will later be holding a working lunch and appearing at a joint-agreement signing ceremony later in the day.
Asked if he would declare a formal end to the Korean War, which concluded with an armistice, rather than a peace treaty that North Korea has long sought, Trump said on Wednesday: "We'll see".