The North's official Korean Central News Agency reported that Kim attended the ceremony in Sunchon with other officials.
A deputy assistant secretary of defense recently discussed the advantages of positioning a souped-up THAAD battery in Hawaii.
The U.S. Air Force this week flew a B-1B Lancer to the Pacific as part of its new unpredictable deployment experiment.
The Korean Central News Agency said Kim guided an artillery firing competition between army units on Thursday.
The Army positions sets of APS around the world so brigade combat teams and other units can deploy rapidly.
Small-scale exercises with South Korea have kept U.S. troops ready for conflict with North Korea, defense officials say.
Shinzo Abe pledged to bolster his country's role under its pact with the U.S. in “outer space and cyberspace.”
The Yokosuka-based guided-missile cruiser USS Shiloh sailed through the strait on Thursday.
China's navy commissioned its biggest and most advanced surface warship yet, the Nanchang guided-missile destroyer.
Security Force Assistance Brigades have so far deployed only to Afghanistan.