Hachiju-Hachi-Man Bun no Ichi no Kodoku (1978) directed by Sogo Ishii

IMDB says:
An elegiac ode to a loner who finds it difficult to fit in and the inevitable eruption of his frustration, Isolation of 1/880000 tells the story of Takemitsu, a disabled young man caught in the “examination hell” of trying to get into one of Japan’s top universities. Director Sogo Ishii (now renamed as Gakuryu Ishii) was the original 8mm punk, whose works expressed unhinged energy and made speed, intensity and rebellion their stylistic and thematic center, carrying over into his later 16mm and 35mm films such as Crazy Thunder Road and Crazy Family. In contrast, Isolation prefigures the more ethereal aesthetic of his big budget 1990s films.