Abstract: The North Korean nuclear problem has remained unsolved for 25 years. A variety of approaches can be used to resolve the problem, ranging from economic incentives to dialogues, sanctions, and military strikes, but sanctions appear to be the most plausible solution as a realistic method. Still, the question remains how to make sanctions against North Korea more effective. This article focuses on a regional approach to international cooperation and suggests that a regional security arrangement should be established in Northeast Asia to resolve the North Korean nuclear crisis. Today, the international order is undergoing change. Globalization is in retreat. Under these circumstances, international problems seem to be solved most effectively through regional cooperation. Northeast Asia has no significant regional cooperation arrangements. A successful regional cooperation requires two elements. First, the South Korean government needs to utilize the North Korean nuclear problem, redefining it as a threat to regional peace; such a shift in threat recognition would elevate the importance of a regional solution. Second, the process of building a regional arrangement needs institutionalization. The existing regional dialogues can hardly help solve the nuclear problem. In this sense, it is necessary to recalibrate the Six‐Party Talks as an institution implementing sanctions as resolutions adopted in the UN Security Council.