The fact that rituals and tsuiso (the burial of an individual in the same tumulus which has already been occupied by the remains of another person) were held in tsukuridashi built near the foot of the constricted portion of the tumulus and not at the summit suggests that there may have been a change in attitude towards funeral rites.
祭祀・追葬が後円部や前方部の墳頂で行われるのではなく、括れ部裾付近に作られた造出で行われたことは、葬送儀礼の考え方が変わって来たのではないか。