古墳時代
The Kofun period is called the Yamato period by some Western scholars, since this local chieftainship became the imperial dynasty at the end of the period. However, the Yamato clan ruled just one polity among others during the Kofun era. Japanese archaeologists emphasise that other regional chieftainships (such as Kibi) were in close contention for dominance in the first half of the Kofun period; Kibi's Tsukuriyama Kofun is Japan's fourth-largest.