In "Death Note," the theme of justice as a form of control is primarily explored through the character Light Yagami, who uses the Death Note to enforce his own sense of justice by eliminating those he deems to be criminals. Through his actions, Light attempts to control and reshape society by acting as a self-appointed judge, jury, and executioner. This portrayal raises questions about the morality of using power and authority to manipulate others in the name of justice, ultimately provoking viewers to consider the potential consequences of such actions.