Senior officials from Japan, the United States and South Korea have reaffirmed their three-way partnership for achieving the denuclearization of North Korea.

At the second US-North Korea summit last week in Hanoi, North Korea asked for a lifting of sanctions in exchange for scrapping its Nyongbyon nuclear complex.

But the US demanded that other facilities be dismantled as well. The two sides failed to reach an agreement.

A post-summit meeting in Washington on Wednesday was attended by Kenji Kanasugi, the Japanese Foreign Ministry's Asian and Oceanian Affairs Bureau chief, Stephen Biegun, the US special representative for North Korea, and Lee Do-hoon, South Korea's special representative for peace and security on the Korean Peninsula.

A US State Department spokesperson said the officials discussed continued, coordinated efforts to achieve the final, fully verified denuclearization of North Korea.

Biegun said nothing to reporters after the meeting.

Kanasugi told NHK the discussions were productive.

NHK