It has nakid children saving freshly sold-to-the-brothel girls while singing a jaunty tune.
Seriously it is a musical about early WWII Japan before the west got involved. It is so absurd in its portrayal of the ridiculousness of the war itself shown through child's play and the seriousness of reality.

The mostly child cast carries the movie through the harshness of resource poor Japan through symbolism and play. Mock wars to mimic the actual war that is waging at the time. Its kinda deep if you know history and its effects on societies. the thing that brought the rating down for me was the unneeded use of unclothed children.