This book takes the reader on a fascinating journey through the history of a region from the perspective of the interactions that occurred on and were facilitated by the sea. The book is divided into three parts that each focus on a different hundred-year period between 1250 and 1800. The chapters in each part examine the people, goods, and information that flowed across the seas of the East Asian maritime world, facilitating cultural exchange and hybridity. The intricate and often fraught relations between China, Japan, and Korea feature throughout, as well as those between these polities and the waves of outsiders that sought to trade with them and to conquer them. Regional diplomacy, ship-building technology, weaponry, Wokou pirate bands, the fates of castaways, and the development of international trade networks are just some of the topics that paint a vivid picture of the interconnected world of the East Asian maritime region during this period.