North Korean leader Kim Jong Un's powerful sister condemned upcoming joint military drills by South Korea, the United States and Japan as a "reckless show of strength" that would bring "bad results," state-run media said Sunday.

The allies are set to hold joint military drills from Monday through Friday off the South's Jeju Island, combining naval, air and missile defense exercises to better prepare against threats from the nuclear-armed North.

Seoul and Washington, which stations around 28,500 troops in South Korea, will also stage a tabletop military exercise, aimed at integrating their military assets.