

> If you write die of disease with a specific disease's name and the person's
> time of death, there must be a sufficient amount of time for the disease to
> progress. If the set time is too tight, the victim will die of a heart
> attack after 6 minutes and 40 seconds after completing the Death Note.

Let's say Y has a Death Note. He also has Shinigami Eyes, and because he's a
genius he can read in Shinigami time. So he wants to kill Z.

He writes:

> Z, bradykardie, dies of bradykardie at 11:59 on this date: 25.07.2062. Till
> he dies, he will always do whatever the person he knows as A tells him to
> do.

(Yes, Z is destined to die at the mentioned date.)

(A won't die, since he already wrote his own name in his Death Note.)

Would this work?


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question
death-note
How long can you manipulate a person with a Death Note?


This would not work, because you can only manipulate a person for a maximum of
23 days with the Death Note. This is therefore straightforwardly called the
**23 day rule**.

As the [27th rule of the Death
Note](http://deathnote.wikia.com/wiki/Rules_of_the_Death_Note#How_to_Use:_XXVII)
states:

> The Death Note can only operate within 23 days (in the human calendar). This
> is called the 23 day rule.

As mentioned by Laiseran in the comments, **there is indeed one exception to
this rule**. Although not directly relevant to your example, the 23 day rule
can indeed be bypassed. If you write down a specific disease as the cause of
death, but do not specify a specific time of death, the time of death will be
unknown to the writer. The time of death will never be after the day that the
victim's lifespan would run out, but if enough time remained, the Death Note
will give the disease time to take effect. Since it might take more than 23
days for the specific disease to take effect, the human might thus be
controlled longer than 23 days.

As the [28th rule of the Death
Note](http://deathnote.wikia.com/wiki/Rules_of_the_Death_Note#How_to_Use:_XXVIII)
states:

> If you write die of disease like before with a specific disease's name, but
> without a specific time, if it takes more than 24 days for the human to die
> the 23 day rule will not take effect and the human will die at an adequate
> time depending on the disease.


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answer