Reforms undertaken in the name of administration often veer toward political restructuring.In this context,Japanese scholar Masaru Nishio proposed the concept of"administrative rationality and reform politics"as a framework for analysis.Building on Nishio's inquiry,this paper explores Japan's central government reform by examining the formulation of reform proposals,design of reform strategies,and challenges of administrative development.This approach provides a fresh perspective on both the reform process itself and the issues surrounding subsequent reforms.The reform of Japan's central ministries and agencies was shaped by the interplay of administrative rationality,reform politics,and administrative culture.At its core,the reform aimed to dismantle the traditional relationships among politicians,bureaucrats,and the public,establishing a new government structure centered on executive authority.The outcomes of these reforms reflect a provisional balance and compromise between administrative rationality and the political dynamics of reform.The experience of Japan's central government reform offers valuable insights:effective reform requires a critical examination of past efforts,a clear distinction between administrative,political,and cultural dimensions of reform,and a precise application of appropriate strategies within each domain.By doing so,reform efforts can achieve greater coherence and sustainability.