Kira

The human whose name is written in this note shall die.
This note will not take effect unless the writer has the person's face in their mind when writing his/her name. Therefore, people sharing the same name will not be affected.
If the cause of death is written within the next 40 seconds of writing the person's name, it will happen.
If the cause of death is not specified, the person will simply die of a heart attack.
After writing the cause of death, details of the death should be written in the next 6 minutes and 40 seconds.
The note shall become the property of the human world, once it touches the ground of (arrives in) the human world.
The owner of the note can recognize the image and voice of the original owner, i.e. a god of death.
The human who uses the notebook can neither go to Heaven nor Hell.
If the tim
The borrower of the 
The god of death must not hand the Death Note directly to a child under 6 years of age based on the human calendar.
The 
Only 6 Death Notes are allowed to exist at a time in the human world. Of course, the Death Note that the god of death owns does not count. This means only 6 gods of death that have passed on their Death Note to humans can stay in the human world.
One god of death is allowed to pass on Death Notes to only 3 humans at a time.
It is possible for a single god of death to hand out up to 6 Death Notes, for example, by handing 3 humans 2 Death Notes each.
In other words, one human could own all 6 Death Notes.
ting the cause of death, the victim will be killed by heart attack in 40 seconds after writing the name.
If the victim's name and cause of death have been written and the middle of writing the situation of death, then the victim will be killed within 6 minutes and 40 seconds via the statdifference in their effects, as compared with the black cover Death Notes.
All humans, without exception, will eventually die.
Once dead, they can never come back to life.
After the user of a Death Note dies, the place they go to is Mu (nothingness).