Incidentally, a triangle-shaped cloth which children tied to their foreheads instead of the eboshi to imitate adults during their play in the Heian period, was added to the shroud costume in later ages to dignify the dead.
ちなみに平安時代の子供が遊びの中で大人を真似て烏帽子の代わりに額に結わえつけた三角の布が、後代死者の威儀を正すために死装束に加えられた。