The significance of Light Yagami's notebook containing rules for using the Death Note in the anime "Death Note" is that it demonstrates his meticulous and calculated nature. By creating and following strict rules for using the Death Note, Light establishes himself as a disciplined and strategic character who carefully plans out his actions. Additionally, the rules serve as a way for Light to maintain control and ensure that the Death Note is used according to his intentions, showcasing his desire for power and authority.
