The summit between Kim and Trump to discuss denuclearization and peace on the Korean peninsula is scheduled for next Tuesday.
A USA advance team was spotted at the Capella Hotel last week meeting with North Korean officials in preparation for the summit.
And though this falls in a category all of its own, former South Korean president Kim Dae-jung's administration secretly paid 500 million dollars just to get Kim Jong Un's father to agree to the first-ever North-South Korea summit in 2000.
While in Washington, Abe will also likely press Trump to remove Japan from US steel and aluminum tariffs, as well as express his opposition to threats of sharply higher USA tariffs on imported automobiles.
The change in his position was detected after he withdrew his cancellation of the summit, citing the North's positive reaction to his abrupt decision to call off the meeting.
"Japan eventually should develop its own diplomacy to deal with North Korea independently to resolve its problems, including the abductions", said Atsuhito Isozaki, a Keio University professor specializing in North Korea.
U.S. intelligence officials and country experts say they move seems to have been driven more by concerns about potential corruption, and Kim's desire to maintain tight internal control, than any wariness about a coup attempt.
North Korea defends its nuclear and missile programs as a deterrent against what it sees as United States aggression.
"The President has broad discretion under existing sanctions law against North Korea.
They're very powerful, and we would not take those sanctions off unless North Korea denuclearises", she said. "We're going to start a process". We can go fast, we can go slowly.
He may play some role in the negotiations, it said quoting anonymous sources.
Some Singapore residents were concerned that the arrival of a number of leaders and diplomats could put their lives in convenience because of the summit but others remained indifferent towards it, the Global Times report said.