The ban remained in effect under Nazi occupation for the same reason.
The film is a satirical story about a teenager imprisoned at an indoctrination camp.
Post here, more importantly - talk to a good therapist.
Austin: University of Texas Press.
Robot Ghosts and Wired Dreams: Japanese Science Fiction from Origins to Anime.
While it is common for films to be edited to fall into certain rating classifications, this list includes only films that have been explicitly prohibited from public screening.