This book intends to examine the relationship between East Asia and Southeast Asia across three themes: historical perspectives, economic flows of capital and people, and socio-cultural connections. While a substantial number of chapters in the book focus on overseas Chinese (living in Indonesia) and their connections with China and Taiwan historically and contemporarily, they also provide in-depth knowledge of international relationship between East Asia and Southeast Asia. Part One, 'Contending Regional Approaches', consists of four chapters that help readers understand the involvement of East Asia from a in historical context. The first chapter on Taiwan before 1975 is followed by a chapter on Taiwan's strategy toward Southeast Asia after the 1980s. The remaining two chapters focus on China-Southeast Asia and Japan-Southeast Asia relations. Part Two, 'Economic Flows of Capital & People', consists of six chapters that mainly examine the flow of capital and people between Indonesia and Taiwan from the colonial period to the present and how this flow changed both societies. Part Three, 'Socio-Cultural Connections', consists of three chapters. This part is a unique contribution to the scholarship that focuses on the transformation of both traditional and popular culture among Southeast Asia, China, and Taiwan by focusing on different agents.