In Episode 37, Light dies. Soon after that, Misa commits suicide. But I'm a little confused now, because of this rule:

the death of the person whose name is written in the book can not lead to anyone else's death

Now, everyone knows that Misa will commit suicide if Light dies. But the death of a person whose name is written in the book can't lead to anyone else's death. So basically, Ryuk shouldn't have been able to kill Light, because if Light is dead, that will indirectly lead to Misa's death. So, have I missed something in Death Note, or am I right?

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    …Directly. The death of the person whose name is written in the book can not lead to anyone else's death directly, as it would be the same as killing someone else, for which you have to write a name and imagine the target, which you'd be missing, and that is an essential part of killing someone with the Death Note, so you have to do it properly by writing a separate death note according to all rules.
    – Hakase
    Commented Jul 2, 2014 at 9:57
  • I don't remember it well, but I think Misa commits suicide as per her own will, which doesn't violate any rules. But if she wrote something like "I die if Light dies first" in the Death Note, it would still be valid, since she would have died from a heart attack if the condition isn't met.
    – Hakase
    Commented Jul 2, 2014 at 9:59
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    The Death Note doesn't allow "if...then" conditions, judging by the fact no one ever uses it this way.
    – Az-
    Commented Jul 2, 2014 at 14:17
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    @user1306322: You have written But if she wrote something like "I die if Light dies first" in the Death Note. I think that THIS would cause Light's death as by doing this she would write Light's name to the notebook. Commented Jul 2, 2014 at 14:48

3 Answers 3


The title of this question is misleading, because "another flaw" assumes there was a first flaw. Death Note avoids plot holes more rigorously than perhaps any other series in existence. Whenever someone misunderstands or forgets some element of the storyline, they tend to think their misunderstanding must be a flaw in the story.

The rule you're thinking of is Rule XXVI.


Even though only one name is written in the Death Note, if it influences and causes other humans that are not written in it to die, the victim's cause of death will be a heart attack.

Things to note:

  1. It doesn't say that the Death Note is incapable of killing people who aren't written in it. It only says that, in these cases, the victim's cause of death must be a heart attack.

  2. This rule only specifically refers to directly causing the immediate death of other people. This is made clear in the story, and it's also clarified in the rules, with Rule XLII.


The use of the Death Note in the human world sometimes affects other human's lives or shortens their original life-span, even though their names are not actually written in the Death Note itself. In these cases, no matter the cause, the god of death sees only the original life-span and not the shortened life-span.

It spells it out here that killing a human with the Death Note can shorten the lifespan of other humans, "even though their names are not actually written in the Death Note".

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    Note: it doesn't mean you can tell him to die of a heart after murdering L. In that case he will still just die of a heart attack within a few seconds. You can, however, write down L's driver's name which he is in the car so his heart attack could feasibly kill L.
    – kaine
    Commented Jul 3, 2014 at 16:06
  • That's right ^^
    – Az-
    Commented Jul 3, 2014 at 23:58

Note: It's been a while since I watched Death Note, and it's not a series I've followed much afterwards, so feel free to correct me if I'm wrong. I have also only seen the anime.

There are two points to address here:

  • Is the fact that Misa will commit suicide if Light is dead completely certain?

  • What exactly constitutes "leading to the death of another person"?

In Death Note, we see that Misa is fairly devoted to Light, in almost an obsessive way, but it's not completely clear if she's obsessed to the point where life would be completely pointless without him. We do see that she's fairly dependent on him, and to be honest arguing about whether or not she's that devoted to Light is slightly difficult, so it's easier to come to some conclusion by looking at the exact mechanics of the death note.

The "leading to the death of someone else" bit is usually interpreted as

the death of someone whose name is in the DN cannot directly lead to the death of someone else1

An example of something that wouldn't work would be:

XXX hijacks a passenger jet and crashes it into a mountain [which wouldn't work because it would kill the passengers as well]

In Misa's case, her suicide is somewhat indirect, so one could say that this rule doesn't quite apply here - I get the impression that driving the bereaved to suicide as a result of someone's death doesn't really count. (We should note that the influence that the Death Note rules talk about seem to be more "physical" and direct.) As stated by user1306322, Misa commits suicide of her own will here, which is also important here.

  1. Realistically speaking, the idea that something will occur as a result of an earlier event can't really be said to ever be completely certain (in the same way one might say that there's a chance the sun might not rise today). But given how we see the death notes work, I don't think this should be an issue per se as long as the causality is reasonably direct.
  • In an episode she said something like: I can't live in a world without Light. And then L says: Yes that would be dark. :P
    – DarkYagami
    Commented Jul 2, 2014 at 10:42
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    I wonder what would happen if you write "Mortally stab a man and after kill yourself". He wouldn't die at the time of death, so technically that death didn't cause more deaths and who knows, he might be saved. Would he stab him? Commented Jul 2, 2014 at 11:18
  • @PeterRaeves: I feel like that case shouldn't be allowed, but the possibility of being saved by other people (in this case, or even in the examples in the question I linked to) give a dreadful lot of ambiguity.
    – Maroon
    Commented Jul 2, 2014 at 11:23
  • Rem said it herself, that if Light dies, Misa would kill herself. So basically, it is a fact.
    – DarkYagami
    Commented Jul 6, 2014 at 19:41
  • @user6399: as I've said, the more important bit is that the rule should only concern very direct deaths.
    – Maroon
    Commented Jul 6, 2014 at 20:31

Technically, the death of Misa would make sense. Obviously, the writer thought of some possible loopholes in what he wrote which resulted in the line which may have either been said by Ryuk or Rem, that not even the shinigamis themselves know all the true potential/rules of the Death Note. I believe what the rule actually meant was that someone couldn't write a chain effect of death, it would be too much for the notebook to possibly handle and would make it too easy for people to wipe out a mass amount of others and make it seem like an 'accident'.

Obviously, there would be loopholes in the Death Note due to the fact that if you watch the series, shinigamis actually aren't aware of how humans act and are often bored without anything to do and sit around doing absolutely for years upon years, which is the reason why Ryuk 'drops his Death Note' (which didn't even belong to him.) If you really think about it, Misa's death makes perfect sense.

The action was hers and hers alone and she was not controlled. We often see throughout the series Misa being often mistreated by others and disregarded. She also went through an immense amount of trauma that was disregarded by everyone else and was kidnapped and blindfolded for days, so it would make sense if she has had symptoms of depression way before Light's tragic death.

Also, Light later in the series had fake rules written, so what's to say that there was once a tragic issue where many people were killed in a chain event and the rule was made up added to prevent it to happen again. And, technically from what we saw, Misa's name was never written so the rule would not count against her death to prevent it.

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