Light Yagami ensures his continued anonymity while using the Death Note by being extremely cautious and strategic in his actions. He avoids using the Death Note in public or in front of others, maintains a secret identity as the mysterious vigilante "Kira," and takes various measures to cover his tracks and mislead investigators, such as manipulating the timing and circumstances of his killings. Additionally, Light takes advantage of the Death Note's supernatural abilities, such as controlling the actions of his victims, to further distance himself from any suspicion.