全球能源消費大國之中，日本的低能源蘊藏量以及高能源利用率常引起多方研究。本文從蒐集並整理日本戰後至2011年間的能源政策、比較311前後兩個執政黨（民主黨、自民黨）的能源政策立場，到探究日本於311後能源政策轉折的方向及原因、並且進一步推敲出日本的能源治理模式。因此發現，日本在二戰之後就開始運用一系列的政策手段與能源市場干預途徑，突破低能源蘊藏量之先天不利條件，達到高能源利用率之後天技術優勢所創造的經濟成長。而當日本經歷2011年3月11日東日本大震災後，政府更強烈介入能源市場，希望進行能源結構的轉型，使得日本得以維持能源高自主率與溫室氣體低排放率的目標。本文因此結論，日本雖然身為能源匱乏國，但是它的能源政策充分體現出了國家介入能源市場由上而下治理模式的特性，使得日本得以突破能源約束，在諸多能源不利之條件下開創了近半世紀的經濟高度發展期。此外，本文亦結論日本於全球能源治理的角色可以歸納為三：（1）全球溫室氣體減量暨全球能源安全提升的追隨者；（2）區域性能源合作的示範者；（3）全球核能安全建立的示範者等三種角色。 / Japan is noted for its low energy endowment but high energy efficiency among the global top energy consuming nations. In this study, collection of the past Japanese energy policies from 1945 to 2011, comparison of the political stances on the energy strategies between the two Japanese ruling parties, Liberal Democratic Party and The Democratic Party, and investigation on factors causing a change of Japan’s energy policy post Fukushima contributed to outlining the pattern of Japan’s energy governance. This study found that Japan’s intervening in its the post-war domestic energy market by means of a string of policy instruments has successfully made Japan overcome the predicament of high energy demands out of low energy reserves, further achieve the edge of high energy efficiency, and therefore create its outstanding economic growth. Nevertheless, after experiencing another energy predicament post Fukushima, Japan made more effort on the intervention into its energy market to transform its domestic energy consumption structure with a view to maintaining high energy self-sufficient rates and low GHGs emissions. To conclude, although Japan is a nation of insufficient energy resources, its energy policies reveal the trait that the state intervenes in the energy market by the top-down governance approach to make its way to break through the energy constraints, creating a nearly half-century’s economic prosperity. Besides, we also conclude that Japan plays three major roles in the domain of global energy governance: 1. a follower of global GHGs emission abatement and global energy security enhancement, 2. a demonstrator on regional energy cooperation and, 3. a model of building global nuclear power safety.