Until the latter half of the fourth century, the Yamato Kingdom's royal tombs were situated in Yamato (the Nara Basin), but after that, the majority were built in the Kawachi Plain.
4世紀後葉より以前ヤマトの王の墓はヤマト（奈良盆地）に営まれていたが、それ以降は河内平野に築かれることが多くなった。