Tokyo's previous warnings not to trust Pyongyang have been withdrawn as both Washington and Seoul launched forward with commitment. Abe now seeks a summit with Kim for himself, instead of staying out of the rapidly changing political situation in North Asia.
While Abe had cultivated close ties with Trump, becoming the first foreign leader to meet with him after his election, he has also faced disputes with the American leader over trade.
"It is a sign of the close and continuous relationship that was granted a meeting with little notice," said Euan Graham, director of the International Security Program at the Lowy Institute in Australia.
"But the brightness also comes from there, given Trump's tendency to apply leverage freely between economic and security issues."
Protests and polls
Tens of thousands protested on Saturday before the Japanese parliament in Tokyo, accusing Abe of being a liar and demanding his resignation due to a corruption scandal that has affected his term as prime minister for months.
While the protests this weekend did not reach the size of the At meetings in 2015 in protest of Abe's pressure to expand the army, the combination of pressure within the PLD and the public has doubts about whether Abe can stand.
"Abe seems unable to get rid of the scandals," Graham said, although he noted "There was a time when serving Japanese Prime Ministers would be lucky to record more than 20% popularity."
"But it is the most difficult period he has faced since he returned to the post of prime minister, without a doubt," he said.
Duncan Innes-Ker, Asia regional director in the Intelligence Unit of The Economist, said there was no doubt that Abe had been hurt by the current scandal.
"In this context, Abe urgently needs a victory," he said.
The Japanese leader could expect victory in Mar-a-Lago, where, according to a White House statement, Trump and Abe "will explore ways to expand fair and reciprocal trade and investment ties between the United States. " States and Japan. "
Innes-Ker said that Trump" could potentially offer concessions on the steel and aluminum issue or could point to the United States' intention to join the (Trans-Pacific Partnership). "
While "both would be seen as a triumph for Abe," he cautioned that they would not come without concessions from Tokyo.
Although Trump did surprise the observers by indicating last week that he might be willing to join the TPP – a trade agreement negotiated by Obama who once criticized – the White House will probably push Tokyo to sign a bilateral agreement less with Abe's.
Since his return to the presidency in 2012 Abe has made safety a key element of his appeal, and his tough response to North Korea's missile tests last year was a key part of his election campaign during the early elections. Last year.
Abe's hawkish stance seems to have failed, however, with Seoul and Washington pursuing the commitment to Pyongyang.
"In North Korea, Japan now seems to be the most isolated of the allies, it has even tried to reopen independent contacts with Pyongyang, and is currently conducting a fence-repair diplomacy with China," Graham said.
"But Abe has made the decision to double in the US Alliance and can not be expected to reverse the course now."
A big concern in Tokyo is that a future agreement with North Korea could result in the retention of Pyongyang missiles that can point to Japan.
He said he would ask Trump to pressure North Korea to "also abandon the short and medium-range missiles that put Japan within range."
"Even South Korea is struggling to get its voice heard as the momentum of denuclearization increasingly becomes a discussion between the US, China and the United States. North Korea, "said Innes-Ker.
"It is not clear if any party is leaving Japan aside as a conscious move, but they are certainly not getting close to including it, and as a result, their priorities could be removed from the list"