Bakeneko

"The bakeneko (化け猫, "changed cat") is a type of Japanese yōkai, or supernatural entity; more specifically, it is a kaibyō, or supernatural cat. It is often confused with the nekomata, another cat-like yōkai. The distinction between them is often ambiguous, but the largest difference is that the nekomata has two tails, while the bakeneko has only one."

"Depending on the area, there are stories in which cats that were brutally offed by humans would become bakeneko and curse that human. Bakeneko stories are not only about aged cats, but also sometimes about revenge against cruel humans." -- Bakeneko WIKI