This article examines Japan’s trade policy on significant geo-economic developments by focusing on its engagement in three large free trade agreements: the Trans-Pacific Partnership, the Regional Comprehensive Economic Partnership, and the Japan–EU Economic Partnership Agreement. Under the Abe administration, Japan has produced successful outcomes in mega-FTA strategy, concluding the Comprehensive and Progressive Agreement for Trans-Pacific Partnership and the Japan–EU Economic Partnership Agreement in 2018. The making and diffusion of high-standard rules were given high priority in Japan’s mega-FTA strategy, and Prime Minister Abe’s political leadership in employing his political allies and executive aides and managing the opposition activities of veto players has enabled his administration to produce these successful outcomes.