East Asia is now one of the most dynamic parts of the increasingly regionalized world economy. This book explores the structure and upgrading mechanism of the highly integrated economy, reviewing the previous paradigm centered on Japan. The focal points are on the flying geese paradigm, the regional production networks, a reinterpretation of the East Asian crisis, the post-crisis transformation of the regional economy and a search for further regional cooperation. This volume aims at presenting, through these analyses, an alternative view for and a perspective on future East Asian regionalism.