One thousand years ago, demons marched through the streets of Kyoto.

These vengeful spirits were once everyday objects such as hammers or umbrellas, yet when they turned 100 years old, they were tossed aside without the proper burial rites. When that happens in Japan, what was once trash becomes a yōkai — a supernatural entity angry, in this case, at its former owner.

These devils are said to have caused chaos in the streets and pranks on shopkeepers including broken wares and other mischief. This demonic cavorting was named the hyakki yagyō (100 demon night parade) and continued until the disaffected yōkai were appeased through a Shinto ritual.