The test was designed to warn “enemies, who are seriously violating the security environment of the (country) and fostering and escalating the confrontation environment” and to demonstrate “readiness of its various nuke operation means,” KCNA news agency said.
“What is guaranteed by powerful striking ability is the most perfect deterrence and defense capacity,” KCNA quoted Kim as saying.
The missile launch was conducted on Wednesday over the sea off the west coast of the Korean Peninsula, it said.
South Korea’s military said on Friday it had detected signs of missile launch preparations on Wednesday and tracked several cruise missiles after they were launched around 8 a.m. local time (2300 GMT Tuesday) over the sea.
North Korea has pursued the development of strategic cruise missiles over several years, intended to deliver nuclear warheads.
That type of missile tends to bring less alarm and condemnation from the international community than ballistic missiles because they are not formally banned under U.N. Security Council resolutions.
The Security Council has banned the North from ballistic missile and nuclear weapons development and imposed a number of sanctions for violations.
The report of the missile test came in the same week that Kim made back-to-back visits to military schools, driving home the message of loyalty and the importance of ideological and tactical training of young military officers.
Kim did not mention any country by name when he spoke of warning the enemies but has kept up harsh rhetoric against the United States and South Korea despite comments by U.S. President Donald Trump that he would be reaching out to him.
Trump and Kim held unprecedented summit meetings during the U.S. president’s first term.