Proximity and memory are the main factors that have shaped the relations between the Japanese archipelago and the Korean peninsula. Since the dawn of history, unceasing human and material exchanges have taken place between these two neighboring areas. Many elements of Japanese culture, like rice growing, seem to have originated in Korea, and Korean immigrants played an important role in the formation of the early Japanese state. On the other hand, the Japanese were involved in internal Korean rivalries, particularly in the fourth and fifth centuries. Under the unified Korean states of Shilla (668–935) and Koryo (935?–1392), bilateral trade.....