Comparative Studies on U.S.-Japan-South Korea's Engagement Policy Toward North Korea : What Makes Differences and Changes

本研究试图在国际关系理论的基础上对接触概念进行界定，厘清日、美、韩三国接触政策的理论特征、基本假设、政策内容以及各自政策的局限性和问题。它还以“接触”这一共同理论框架为基础，对各自的对朝接触政策进行了分类。接下来，本研究试图回答以下两个为什么问题。首先，它探讨了为什么每个国家对朝鲜采取不同的接触（或其他政策）。其次，它还探讨了为什么每个国家都改变了各自对朝鲜接触政策的内容。本研究发现，这些相互作用之间的领导人的看法和国内政治在每个国家的影响。

This study tries to define the concept of engagement based on international relations theories and clarify the theoretical features, basic assumptions, the content of policies and limits and problems of respective policies of Japan, the United States and South Korea. It also typologies respective engagement policies toward North Korea based on the common theoretical framework called engagement.Next, this study tries to answer the two following why questions. First, it explores why each country conducts different kind of engagement (or other policies) toward North Korea. Secondly, it also explores why each country changes the content of respective engagement policies toward North Korea. This study found out that those interactions between leaders' perceptions and domestic politics in each country matter.