Kofun period
While conventionally assigned to the period 250–710, including both the Kofun period (–538) and the Asuka period (538–710), the actual start of Yamato rule is disputed. The Yamato court's supremacy was challenged during the Kofun period by other polities centered in various parts of Japan. What is certain is that Yamato clans had major advantages over their neighbouring clans in the 6th century. This period is divided by the relocation of the capital to Asuka, in modern Nara Prefecture. However, the Kofun period is an archaeological period while the Asuka period is a historical period. Therefore, many think of this as an old division and this concept of period division is no longer applicable.