Tradition / Region: Japanese Mythology
Alternative names: Old Crow
Category: Bird
The Myth
The Kogarasu (“Old Crow”) is a crow yokai from the Tosa Obake Zōshi (Tosa Ghost Scroll). According to the legend, it is an ordinary crow that has lived for a thousand years before transforming into a fearsome supernatural creature.
Unlike common crows, the Kogarasu remembers those who mistreated it during its lifetime. After gaining its yokai form, it takes revenge upon its former tormentors by digging up their graves after death and feeding upon their corpses. In this way, the creature punishes cruelty long after its victims have passed away.
The Kogarasu is portrayed as a grim embodiment of vengeance, demonstrating that even the smallest acts of malice toward living creatures may one day return to haunt those responsible. It remains one of the many strange yokai recorded in the Tosa Obake Zōshi, where ordinary animals become supernatural beings after surviving for an extraordinary length of time.
Sources
TYZ. (2009, July 26). 古烏 (Kogarasu). In 新版TYZ 妖怪図鑑. Retrieved June 29, 2026, from https://tyz-yokai.blog.jp/archives/1010652618.html