Shinji Kajio (?? ??, Kajio Shinji, born 24 December 1947 in Kumamoto Prefecture) is an award-winning Japanese author of science fiction and fantasy.
The film Yomigaeri is based on Kajio's novel of the same name and he also co-wrote the manga Omoide Emanon (????????) (2008, "The Memory of Emanon") series with Kenji Tsuruta (who additionally illustrated the series), which was serialized in Monthly Comic Ryu.
The manga is based on his 1983 short story of the same title and became the beginning of his long-running series of "Emanon" short stories (1983-2017+), about a mysterious girl born 3 billion years ago (and whose name is "No name" backwards).