Neko ni Tensei S-a Oji-san (ねこに転生したおじさん; "The Guy That Got Reincarnated as a Cat") is a Japanese manga series written and illustrated by Yajima. Originally published as a web manga on Twitter and Instagram since February 2023, it was later picked up for serialization by Kadokawa Corporation, who then began serializing the series on their KadoComi website in October of the same year. The series has been compiled into four tankōbon volumes by Kadokawa Shoten as of March 2025. An anime television series adaptation by Studio Eight Colors aired from October 2024 to September 2025.