Japan has softened its stance on talks with North Korea and now plans to take part in informal meetings that do not include substantive negotiations on Pyongyang's nuclear arms program, government sources have said.

The shift puts Japan in line with the United States, which tried to organize high-level talks with North Korea earlier this month on the sidelines of the Pyeongchang Winter Olympics in South Korea.

The administration of Prime Minister Shinzo Abe has repeatedly said that no meaningful dialogue can be held with the North until it takes concrete steps toward scrapping its nuclear arms program.