US President Donald Trump's upcoming visits to Japan in the next two months could lead to the resumption of negotiations between the US and North Korea on Pyongyang's denuclearisation process, said a special adviser to South Korean President Moon Jae-in on Wednesday."Maybe when Trump visits Japan in May and June, he will also visit South Korea, and if so, I think, talks between the US and North Korea will be also possible," Yonhap News Agency quoted Moon Chung-in, a special presidential adviser for unification, foreign and security affairs, as saying during an event on inter-Korean ties here.Trump is scheduled to pay a visit to Japan next month. He is also slated to visit the East Asian nation for the G-20 summit in Osaka in June.Stressing that he remained optimistic of resumption of nuclear talks between Pyongyang and Washington despite the deadlock, Moon Chung-in said, "It is true that uncertainties are looming after the Hanoi summit and that we are in a difficult situation with ...