"We strongly condemn these actions and we again call for North Korea to stop further unlawful, destabilising acts," Harris said during the meeting, convened to discuss the launch.Japanese Prime Minister Fumio Kishida warned of further missile launches by the North and a possible nuclear test, the Japanese government said in a statement."Pyongyang is trying to disrupt international cooperation against it by escalating military tensions and suggesting it has the capability of holding American cities at risk of nuclear attack," said Leif-Eric Easley, a professor at Ewha University in Seoul.North Korea's stepped-up development and testing of missiles also indicates that, despite its dire poverty and sanctions by the United Nations as well as the United States and other nations, it has faced few hurdles obtaining the technology and materials it needs for its missile programme.Misawa Air base, which hosts both Japanese and U.S. troops, briefly issued an order to seek cover, according to a post on the base's Facebook page."