Ghost Stories , also known as Ghosts at School, is a Japanese series of children's novels written by Tōru Tsunemitsu. It was published by Kodansha, starting in 1990. The series is a collection of popular school ghost stories in Japan, rewritten specifically for a young demographic. A four-part film series based on the books was produced from 1995 to 1999. Additionally, it was adapted into a television series in 1994 and an anime produced by Studio Pierrot and Aniplex in 2000. A video game was also produced.

Pierrot Co., Ltd. is a Japanese animation studio established in May 1979 by Yuji Nunokawa, previously an animator and director for Tatsunoko Production. Its headquarters are located in Mitaka, Tokyo. Pierrot is renowned for several worldwide popular anime series, such as Naruto, Bleach, Tokyo Ghoul, Yu Yu Hakusho, Black Clover, Boruto: Naruto Next Generations, Ghost Stories, Great Teacher Onizuka, and Saiyuki.