日本民主黨於 2009 年的眾議院選舉中擊敗執政的自由民主黨，黨魁鳩山由紀夫於 9 月 16 日成為日本首相。由於民主黨在參議院未過半，為了維持國會穩定運作，鳩山首相選擇與社會民主黨、國民新黨組成聯合內閣。 不過鳩山政權內部不斷出現閣員之間的對立，而鳩山首相始終無法處理這些政府決策過程之中所發生的混亂，學者與主要媒體多認為，發生混亂的原因是在於鳩山本人的領導能力不足。不過本論文認為，導致鳩山政權內部的混亂主因是民主黨建構的決策運作模式本..

Yukio Hatoyama, the chairman of the Democratic Party of Japan (DPJ), succeeded to the Prime Minister of Japan on 16 September 2009 after DPJ won the 2009 Japanese general election. In the election, DPJ acquired 308 out of a total of 480 seats in the House of Representatives of Japan, while the Liberal Democratic Party(LDP), the former ruling party only acquired 119 seats. However, Hatoyama was thus forced to form a coalition government with the Social Democratic Party and the People’s New Party in response to a situatio..

本文主要是補充論述日本新選舉制度與自民黨走向集權化的關係。既有研究指出，在新選舉制度下，日本自民黨的派閥勢力逐漸地瓦解，從政治過程的觀察中，同時顯示出自民黨派閥的影響力確實也在消退中。本文發現，自民黨在新選舉制度下，依然維持「現任者優先」的提名策略，而「現任者優先」卻具有默認既存派閥勢力的意味。就此而言，派閥勢力應該保有足夠的生存空間，又為何會在新選舉制度下逐漸消退呢 ? 本文擬從候選人在新選舉制度下的「趨中現象」、「政權公約」的黨中央主導、重複提名的設計與比例的提高，以及 「七十三歲屆..

The main purpose of this paper is to further elaborate on the relationship between Japan's new electoral system and augmentation of power in the LDP central committee. The existing studies pointed out that the newly-reformed electoral system in Japan leads to a gradual decline of factions within the LDP while the actual power of the LDP central committee was elevated. However, this paper argues that if LDP's nomination process in the new electoral system still complies with the principle of “incumbents first," which w..