Kurohitsugi comes from Tite Kubo's Bleach, where Kidō spells are numbered by power and Hadō covers destructive techniques. Number 90 creates a black coffin of gravitational energy that seals and crushes its target. Sosuke Aizen famously used a version without the full incantation, while Kisuke Urahara later recited the complete chant against Aizen. The full version became a favourite among anime fans because its poetic, ominous wording shows mastery far beyond ordinary attacks, and clips of the chant continue to circulate in edits, memes and power-scaling discussions.