Observation holes are devices used by Shinigami in the Shinigami Realm that allows them to observe the Human World.
Appearance[]
Observation holes tend to look spherical in shape and most are old and worn out as if they were hundreds of years old and have never been maintained.
Purpose[]
Observation holes are a necessity for Shinigami as they make it possible for them to find human victims without travelling to the human world themselves. If a Shinigami already knows the name, lifespan, and face of a human, they can use the observation holes to instantly locate and watch the human by thinking of what they look like.
These holes can be found all around the Shinigami Realm; there are even "desert areas with holes for looking down to earth. Nothing else is necessary." [1]
Plot[]
Throughout the plot, the observation holes are rarely seen being used. The Shinigami Gelus uses one to watch a human girl he had grown attracted to. It is also used later on by Sidoh in an attempt to locate his lost Death Note.
Trivia[]
- The devices' appearance is likely based on the Sfera con Sfera sculpture held at the Vatican Museum.