The book examines how the United States and Japandespite their sharp differences in cultural, historical, and geographical backgroundsestablished a bilateral and clear linkage with each other by exploring their encounters with one another over more than one-and-a-half centuries with close focus on culture and diplomacy. The author desires that this examination contributes to an establishment of a better understanding of the relationship between the two nations, which aims to clarify stereotyped ideas and misunderstandings that from time to time can lead two nations to a confrontation against each other. Moreover, this study sheds new light on determining twenty-first century relations between the United States and Japan and putting an end to the nearly three-decades-long uncertainty in their relationship.