North Korea's Kim Yo Jong, the powerful sister of leader Kim Jong Un, criticized Japan's recent test-firing of a Tomahawk cruise missile in a statement carried Wednesday by state media, saying Pyongyang would adopt new military measures in response to what she characterized as a growing threat from Tokyo. Kim said Japan has tried to conceal its ambition to become what she described as a military giant, and asserted that the United States is behind Japan's expanding military activity. North Korea had separately criticized the expansion of U.S. Attention going forward is likely to center on whether North Korea follows through with any concrete military measures in response to Japan's Tomahawk capability, and on how Tokyo and Washington respond to Kim's statement. Continued monitoring of further North Korean missile activity and any additional joint military exercises involving Japan, South Korea and the United States is expected to remain a relevant storyline as regional tensions continue.