鳩山由紀夫政権におけるアジア外交－－「東アジア共同体」構想の変容を手掛かりに

鳩山由紀夫政府的亞洲外交－－以「東亞共同體」構想的變遷為線索（Japan's Asia Policy during the Yukio Hatoyama Administration: A study of the 'East Asian Community' Proposal and its Transformation）

2009年9月民主黨經由總選舉（眾議院大選）實現了政權輪替，開啟了由倡導「東亞共同體」的鳩山由紀夫為首、民主黨為中心的日本新政權。這是與普天間基地的遷設問題並列，以美日關係為要的構想，引發各國的高度關注，因為這個發言不僅暗示了「對美自立」，也與素來日本政府的亞洲政策相異，是一項自始就帶有「排他性」的區域合作。然而，在鳩山首相的演說裡，不僅確認了「開放的」合作和美日安保體制的角色，也確認了多層面地使功能性的合作得以拓展的一貫原則。而且，也可看出日本與澳洲、印度等國的安保合作繼續發展，並與韓國維持良好關係。從結果看來，「東亞共同體」的構想並未能促成其後亞洲區域制度的擴大或強化，也不能說日本的亞洲外交已在這時期產生了重大變化。因為以美日共盟為基礎的同盟網絡之角色及其變質、功能合作的進展和包容性的區域合作的必要性，更重要的是因應新興國家崛起和區域內外的大國、中等強國（middle power）存在感的增強的新制度的設計討論，依然尚未著手。

The new administration led by Yukio Hatoyama and the Democratic Party of Japan was established in September 2009, with the proposal of 'East Asian Community'. This proposal generated widespread attention and strong criticism, since it was implied exclusive regionalism and a Japanese foreign policy of 'independence' from American influence. However, Prime Minister Hatoyama publicly stressed alliance with the U.S. and reaffirmed the necessity of functional cooperation in his remarks on Asian policy. Also, the administration made continued progress on its partnership with Australia and India and succeeded in making better relations with South Korea and China. In fact, during his tenure, Japan's Asia policy has not been transformed as it was claimed, and it fails to leave any footprint on regional institutionalization. Issues yet to be discussed include linkage between alliance network and region-wide mechanisms, positioning of rising powers of China and India, and the roles of major and middle powers.