The violence in the film is disturbing, brief and intense. It mostly involves teenagers:

Depending on the translation of the English subtitles, expect strong language.

The entire film carries themes about the post-9/11 world. A world filled with unemployment, failure, hopelessness, youth violence, social isolation, terrorism, and misanthropy. The fact that the film revolves around lonely, dysfunctional teenagers in a pessimistic modern Japan helps to drive the intense themes of the narrative.