Cost $25,000 to make. Made over $25,000,000.
Most of the cast paid money to be in this movie, at least initially, because this was a final product of an acting and directing workshop called ENBU Seminar.
According to actress Harumi Shuhama, the cast performed the one-take scene perfectly on the second try, but a crew error led to the cameras stopping during the take and it being unusable.
The first 37 minutes was actually shot in one take. It took 2 days and 6 takes for the cast and crew to get the perfect one.
Shot in 8 days.