Hausu (House) (1977)
Hausu is a cinematic fun house of childlike imagination. Completely out-of-its-mind, and an absolutely singular (and often virtuosic) work of horror, comedy, and melodrama. Every moment of the film is another delightful experiment; colorful, hyper-kinetic, and the most fun you're bound to have movie-watching. Supposedly conceived to get dwindling audiences excited again about Japanese cinema, it's certainly enough to reinvigorate nearly anyone's love for film.
Eureka's Masters of Cinema series has already released an incredible edition of this movie (R2), and Criterion is supposed to be doing it stateside at some point this year.
Trailer: