The Chapter Black tape is an artifact from the Spirit World which is the focal point of the Chapter Black Saga. Originally kept in the deepest bowels of Spirit World's Records Department, it is a compilation lasting for thousands of hours, said to contain the atrocities that humankind had committed over millennia. The tape is so legendary, it is known to demons such as Kurama and Hiei, so much so that Hiei himself sought to acquire the item. According to Koenma, the Chapter Black tape is part of
M a z o k u 悪魔 - Yu Yu Hakusho - Chapter Black Arc
Review] Bad Guys Win! Demon Slayer, “Entertainment District Arc,” Episode 10 “Never Give Up” – OTAKU SINH
Reasons why you should watch (or rewatch) Yu Yu Hakusho
Watch Yu Yu Hakusho · Chapter Black Full Episodes Free Online - Plex
I've been re-reading the manga and man did Togashi go hard on that Sensui flashback. Surprised he was able to get away with this in Jump back then. : r/YuYuHakusho
Hiei, YuYu Hakusho Wiki
YuYu Hakusho Characters - Giant Bomb
Chapter Black: Legacy of the Spirit Detective
Watch Yu Yu Hakusho · Chapter Black Full Episodes Free Online - Plex
Chapter Black, YuYu Hakusho Wiki
Yu Yu Hakusho (2023) (Series) - TV Tropes