Webdelving into the lore of demon slayer, this curse stems from a blood relation between muzan kibutsuji, the demon progenitor, and the ubuyashiki clan. Webthe ubuyashiki family (産 (うぶ) 屋 (や) 敷 (しき) の 家 (か) 族 (ぞく) , ubuyashiki no kazoku? ) is an ancient and noble family tasked with leading and organizing the demon.

Webas tensions escalate, kagaya ubuyashiki, the leader of the demon slayers, seeks assistance from lady tamayo, a powerful demon tanjiro met during the. Webthe ubuyashiki family has left an enduring imprint on the demon slayer universe by remaining steadfast in their resolve to exterminate demons and defend. Webit's likely that koku's sole mission was to hunt down and kill as many slayers as possible and to root out the ubuyashiki family, a mandate akaza likely shared. Webkagaya ubuyashiki's existence was one of the mysteries of the series, especially as the leader of the hashiras and demon slayers, given that his appearance. Webthe ubayashiki’s have been the leaders of the dsc ever since muzan became who he is. Kagaya is respected for being extremely tactical (and having great intuition) and valuing. Webas the hashiras frantically make their way towards the ubuyashiki mansion, it is engulfed by flames, leading to a destructive explosion that burns the ubuyashiki.

Webthe ubayashiki’s have been the leaders of the dsc ever since muzan became who he is. Kagaya is respected for being extremely tactical (and having great intuition) and valuing. Webas the hashiras frantically make their way towards the ubuyashiki mansion, it is engulfed by flames, leading to a destructive explosion that burns the ubuyashiki.