However, burial facilities without funerary goods were found in areas around funkyubo (mounded burials) of the Yayoi period and funkyu (burial mounds) of the Kofun period.it; therefore it is thought that Junso was possibly conducted.
しかし、弥生時代の墳丘墓や古墳時代には墳丘周辺で副葬品のみられない埋葬施設があり、殉葬が行われていた可能性が考えられている。