The “Death Note” has many rules regarding its use, but the most important of them is “The human whose name is written in this note will die. » Light soon tests his powers and decides to purge the world of criminals and evil using the Death Note. Light Yagami becomes Kira and attracts the attention of the world's best detective called L who, with the help of the Japanese police, vows to stop and catch Kira at all costs. Both Light and L believe that they embody justice and are completely correct in their different moral beliefs. Among the many philosophical questions raised in “Death Note,” there is a question of ethics. More specifically, is Light ethically evil or immoral because of the means he uses, or does his end goal negate the wrongfulness of these actions. Light uses the Death Note to not only purge the world of criminals, but to eliminate anyone who gets in his way, including twelve FBI agents sent to help catch Kira. Light uses the Death Note to bring about the dawn of a new crime-free world, populated by kind, honest, hard-working, and trustworthy people he has deemed worthy. Two major ethical theories represented by Light and L are presented in "Death Note". Light represents Jeremy Bentham's theory of utilitarianism while L represents Immanuel Kant's categorical theory.