This Umeyama Tumulus, Hirata Iwaya Tumulus, Oni no Manaita (ogre's cutting board) and Oni no Secchin (Ogre's Toilet) Tumulus, and Noguchio no Haka (Prince Noguchi's Tomb, that is Joint Mausoleum of Emperor Tenmu and Jito) have been constructed using the southern topography of the same hills, and these four tumuli are aligned from east to west.
同古墳と平田岩屋古墳、鬼の爼・鬼の雪隠古墳、野口王墓（天武・持統合葬陵）は同じ丘陵の南側の地形を利用して造られており、4つの古墳が東西に並んでいる。