East Asia (including Southeast and Northeast Asia) has witnessed the most spectacular pacification in the world during the past 30 years. Certain dimensions related to human security have been perceived as weak points in the long peace of East Asia. Despite progress, authoritarian violence is still a reality in East Asia. At the same time, certain other dimensions of human security—most distinctively those elements related to "freedom from want"—have developed very well during the long peace of East Asia. This article will study whether the concept of human security constructs realities that are useful for peace in East Asia. For this, the article will look at how the way in which "human" and "security" are linked, serve and deepen the existing social realities of peace in the region. Furthermore, the article will look inside the concepts of "human" and "security" to see how human security is constructed and whether the construction serves to deepen the long peace of East Asia. The article will argue that the East Asian human security debate could be an intellectual adaptation strategy useful for the promotion of the long peace of East Asia in a deeper sense.