有別於戰後以來政治思想史、歷史與文化的研究，多元主義於 1970 年代中期後在日本政治學界正式登場。利用個案研究、深度訪談與調查計量方法，多元主義針對現代日本政治的運作進行實證分析，而日本的政經與社會結構也出現多元化的現象，賦予多元主義解釋的有效性，使得多元主義研究蔚為日本政治學的新潮流。然而，1993 年自民黨的下野，以及聯合政權形態的常態化，政治決定架構出現重大的轉變，多元主義在此挑戰下，採取政策爭論點研究途徑與特定行為者的個案研究，努力建構普遍的解釋模..

Differs to the traditional approaches of political theory history and the historical-cultural studies in postwar Japan, the pluralism approach had been introduced and connected to Japan’s political studies since the mid-1970s. Because of various changes of political, economic and social structure in Japan, the pluralism approach, which especially emphasizes on the research methods such as case study, in-depth interview and survey study, was efficiently utilized to analyze Japan’s practical politics and gradually b..

戰後日本的政治安定與經濟成果，被譽為「日本第一」或「經濟奇蹟」，引發日本研究者的好奇心，而在觀察日本的政治過程中，政治人物與官僚的角色是主要的焦點。日本的學術界對於政治過程的主導者為誰，先後出現「官僚主導」與「政黨主導」的論爭，爾後又出現「政策類型」的論點，主張政治人物與官僚處於合作或競爭的狀態。本文主要目的是論述上述論點的主要內容，同時分析其成立的背景，最後提出解釋上的侷限性，期望有助於瞭解日本的政治決定過程。  

After World War ΙΙ, “Japan as No.1 (or ‘economical miracle’),” which signifies Japan’s political and economical achievements, always attracted researchers’ curiosity. As we know, politicians and bureaucrats play leading roles in Japanese political processes; consequently, the Japanese academia argued over the perspectives of “bureaucracy domination” and “party domination,” then the argument was switched to “policy domination,” which emphasizes t..