Foreign ministers from a coalition of non-nuclear weapons states pledged Saturday to work in tandem to achieve North Korea's denuclearization, as the country's negotiations with the United States have been at a stalemate.

"The current international security environment is fraught with uncertainty and tension," the ministers of the 12-member Non-Proliferation and Disarmament Initiative said in a joint statement released after their gathering in Nagoya.

"We reaffirm our commitment to the international community's goal of complete, verifiable and irreversible dismantlement of all North Korea's weapons of mass destruction and ballistic missiles of all ranges," the ministers added.