Former U.S. President Barack Obama will embark on a tour of Singapore, New Zealand, Australia and Japan starting Monday, his office announced Saturday.

His visit to Tokyo, the last leg of the four-nation tour, will take place on Sunday.

While in Japan, he will attend an international conference but currently has no plans to meet with Prime Minister Shinzo Abe, though that could change as the date approaches.

Obama will hold talks with Singaporean Prime Minister Lee Hsien Loong during his visit from Monday to Tuesday, and will also convene an Obama Foundation event involving young leaders from the 10-member Association of Southeast Asian Nations, according to the ex-president's office.

During his stay in New Zealand from Wednesday to Friday, Obama will meet with Prime Minister Jacinda Ardern and former Prime Minister John Key.

During a visit to Sydney, Obama will meet Australian Prime Minister Malcolm Turnbull on Friday and Saturday before traveling to Japan the following day.

Obama, who won the Nobel Peace Prize for advocating a world without nuclear weapons, became in 2016 the first sitting U.S. president to visit Hiroshima, the site of the first U.S. atomic bombing.

Obama's trip led to Abe making a reciprocal visit to Pearl Harbor, Hawaii, in a show of reconciliation between the two World War II foes.