Japan has experienced seven educational reforms since the SecondWorldWar. Each reform has been achieved through a revision of the curriculum guidelines. This article aims to explore Japan's education reform and development by means of an analysis of the Curriculum Guidelines. This article consists of two main parts, the first is an exploration of the Curriculum Guidelines' revision process and the second is an analysis of the trend and problems of reform. As results show, Japan's curriculum reform takes a topdown style and the core of thought in educational reform is not fixed. Basically, Japan's curriculum reforms reflect political ideologies, and its courses are the spiral process of rise and fall of neo-conservatism and neo-liberalism.