While Inuyashiki may be categorized as edgy or torture porn, I don't think that's the case. The cruelty that comes to pass in Inuyashiki is the author's idea of the worst humanity has to offer. It's not a statement on edgy teenagers, and it's not an indictment of humanity, it is just what a human being is capable of doing. We all know people like Hiro exist, we've seen enough true crime to understand his way of thinking. He is cold and apathetic towards human life unless he likes you, which is the case for most real-life psychopaths. Nothing made him this way either, he simply is, like many people with serious mental health issues.
At the same time, Inuyashiki is not some saintly figure, he is Oku's way of portraying the best humanity has to offer. He is a testament to human compassion and empathy, things that he believes people keep no matter what they go through. Many people try to help those weaker than them, but feel hesitant, not because they don't care, but because they feel insignificant and powerless. If you were given the powers to help others, when it required so little, I (and Oki) believe that many people would follow the path Inuyashiki takes.
That is what makes Inuyashiki such a good story for me. It is not just a shocking manga meant to disgust and horrify you at the sight of the villain's actions (though it does), it is also a celebration of the inherent kindness in humanity and the joy and wonder it brings. And I think at its most uplifting times, Inuyashiki is truly beautiful.
