Chief US and Japanese delegates to the six-party talks on the Korean Peninsula's nuclear issue have reiterated their request for North Korea's full and accurate declaration of its nuclear programs.

US Assistant Secretary of State Christopher Hill made a comment after meeting his Japanese counterpart Kenichiro Sasae in Tokyo.

He emphasized that Pyongyang's declaration must be 100 percent full-scale.

We have had number of discussions with the DPRK on the declaration, but the issue is that the declaration needs to be complete and correct and they have not provided a complete and correct declaration.

Hill is also scheduled to visit South Korea, China and Russia this week for consultations about the resumption of the six-party talks .

Kenichiro Sasae said Japan would like to continue to strengthen the cooperation with the U.S. and the other three countries in the six-part talks to push forward the denuclearisation process.

North Korea last year promised to abandon its nuclear ambitions in return for the equivalent of 1 million tons of oil and political concessions.

It pledged to disable its nuclear facilities and issue a declaration on its atomic programmes by the end of 2007 but failed to meet the deadline.

In its first statement on the nuclear issue since failing to meet the deadline, North Korea's Foreign Ministry had accused the U.S. and other participants in the six-way disarmament talks of not carrying out their commitments.

It cited delays in shipping energy aid and removing the North from U.S. terrorism and trade blacklists.