Webubuyashiki mansion (産 (うぶ) 屋 (や) 敷 (しき) 邸, ubuyashiki tei?) is a significant location in demon slayer:
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.
Webdemon slayer's hashira training arc finale sets the stage for the final battle with muzan, marking the start of the biggest showdown.
Hashira training arc episode 1 ending:
Lord ubuyashiki seeks tamayo’s help at the butterly mansion, zenitsu returns from his mission to find.
Webmuzan infiltrates the demon slayers’ headquarters, leading him to the hidden ubuyashiki mansion, the home of the organization’s leader, kagaya.
Webthe ubuyashiki family has left an enduring imprint on the demon slayer universe by remaining steadfast in their resolve to exterminate demons and defend.