Japanese films set in high schools are now about as common as cherry trees in Tokyo. This makes box-office sense: Japanese teens read a lot of manga about kids their own age and the more popular become fodder for films.

In manga anything goes ¡ª from time travel to alternative universes ¡ª and that has carried over to the movies based on them.

This trend has not been all bad: Freed from the need to come up with something fresh to say about actual high school life ¡ª which is like coming up with something fresh to say about cherry blossoms ¡ª filmmakers have used fantasy academies to comment on everything from national politics (¡°Teiichi: Battle of Supreme High¡°) to city-versus-suburb status anxiety (¡°Fly Me to the Saitama¡°).