Unified efforts to fully implement sanctions on North Korea are key to resolving Pyongyang’s missile and nuclear threat, UN Secretary-General Antonio Guterres said on Thursday. The UN chief, who met with Japanese Prime Minister Shinzo Abe in Tokyo, also said that North Korea must be de-nuclearized for peace and stability in the region, AP reported. Security Council resolutions need to be fully implemented not only by North Korea but also by others, according to Guterres. The measures are crucial to ensuring that sanctions are in place, and achieving the goal of de-nuclearizing the Korean Peninsula, he said.