| Summary/Abstract |
Based on the neoclassical realism approach, this article aims to clarify factors conducive to Japan’s different roles in both participating in the trans-pacific partnership (TPP) and concluding the TPP-11 by focusing on how the US’s distinctive attitudes towards the TPP under the Obama and Trump administrations influenced Japan’s changing approaches. During the Obama administration, which needed Japan’s participation to expand the TPP in the face of China’s growing global and regional economic influence, Japan incorporated the TPP into its growth strategy and committed itself to sustaining US leadership during TPP negotiations by making necessary concessions on both the international and domestic fronts. By contrast, the Trump administration, with its strong propensity for bilateral deals to counter China’s bid for global economic hegemony with the TPP withdrawal urged Japan to change its reactive stance and take a proactive role in TPP-11 negotiations. This article opens a ‘black box’ of the political system under the second administration of Shinzo Abe, and demonstrates the strengthened function of the Prime Minister’s Office and Cabinet Secretariat or Kantei within the centralised trade policy-making apparatus as key mechanisms contributing to a departure from the traditional features that occasionally hampered Japan’s foreign economic policy initiatives.
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