Many authoritarian regimes in Asia have utilized emergency powers to legitimize their measures of suppressing political opponents and maintaining power. In opposition to previous interpretations that categorize Asian experiences as ‘exceptional cases’ when compared to ‘normal’ Western liberal democracies, this article suggests that this issue should be viewed within the context of the broader ‘affinity’ of the ‘Sonderweg’ phenomenon. The paper compares Germany, Japan and Korea by examining the complex ‘diffusion’ processes of constitutional emergency powers and also by illuminating systemic affinities and fundamental differences. It argues that elites and technocrats in Germany, Japan and Korea exhibited diverging patterns in adopting, filtering and utilizing these constitutional powers.