Japan expects the latest meeting between U.S. President Donald Trump and North Korean leader Kim Jong Un to move forward stalled denuclearization negotiations, Prime Minister Shinzo Abe said Monday.

"Japan has supported the U.S.-North Korea process since the two countries' (first) summit in Singapore (in June last year). We hope the meeting this time will push it forward," Abe told reporters at his office, referring to efforts to achieve full denuclearization of the North.

Trump, who visited Japan for the two-day Group of 20 summit through Saturday before leaving for a trip to South Korea, made a surprise visit to the Demilitarized Zone that divides the two Koreas on Sunday to meet Kim. The two leaders agreed to restart, within weeks, denuclearization talks that have been stalled since the breakdown of their second summit, which was held in Vietnam in February.