This research mainly aims to explore a strategic direction in response to the nuclear missile advancement of North Korea by evaluating its implications. To this end, the research primarily analyzes the nuclear capability and nuclear strategy of the Kim Jong-un regime and then utilizes such analysis to evaluate the implications of nuclear advancement over the next five years by categorizing them into the following dimensions: 1) international relations; 2) inter-Korean relations; and 3) South Korea and North Korea. This paper presents the implications of the research and sets a direction for future research by proposing principles and strategies for South Korea when responding to the DPRK’s accelerated nuclear program.