I was just watching this at the Japan Foundation Touring Film Programme 2017 in London - a great commercial debut by director Tetsuya Mariko. Filmed in Matsuyama in a mix of both city and countryside settings this film is definitely a feast for fans of violent movies, with a zombie-like 18-year old basically beating up everyone coming into his way, and the addition of social media obsessed teenagers recording every violent scene. The never-ending occurrence of senseless violence has some comic feel to it, but this is clearly no comedy. I am definitely looking forward to watch more from this upcoming director, I hope he'll make more films like this :P