8mm film work from 1980 by the Film Studies Department of Bunkyō University. One sunny and gentle day, as I was dozing off by the riverside, I saw a strange dream in which everything in the world began to flow backwards. No that’s not right. This isn’t a dream at all! I have to find the cause behind this! And then I realized: it is I myself, sleeping now by the riverbank, who is creating this distorted world! The title “7’21”” seems to represent the actual running time of the film. (In reality, it is a little shorter.) It was intentionally created as a silent work, effectively using the absence of sound, appealing solely to visual perception, and thereby leading the viewer into a mysterious and extraordinary world they could never experience in everyday life.