死神はデスノートに人間の名前を書く事で自分の寿命を延ばせるか、人間は延ばせない。

The human who becomes the owner of the Death Note can, in exchange of half of his/her remaining life, get the eye balls of the god of death which will enable him/her to see a human's name and remaining life time when looking through them.

デスノートの所有者となつた人間は、自分の残された寿命の半分と交換に、人間の顔を見るとその人間の名前と寿命の見える死神の眼球をもらう事ができる。

A god of death cannot be killed even if stabbed in his heart with a knife or shot in the head with a gun. However, there are ways to kill a god of death, which are not generally known to the gods of death.

死神は心臓をナイフで刺しても頭を銃で撃ち抜いても殺す事はできない。しかし、一介の死神は知らない死神の殺し方は存在する。