While visiting an arms factory on Friday, Kim made the production order "to cope with ...the enemies' reckless military confrontation" and bolster nuclear war deterrence, KCNA said, Reuters reported.
This way, the enemy would be afraid of North Korea's nuclear combat posture, Kim added.
North Korea fired a number of short-range ballistic missiles towards the sea off its east coast on Friday, South Korea's military had said. Kim expressed satisfaction with the successful missile test featuring an autonomous navigation system, KCNA said.
Friday's launches came a day after the US and South Korea conducted joint drills with stealth fighter jets simulating air combat.