We [created Dark Star] to change the world...
Namikoshi, Rampo Kitan episode 10


Dark Star is normally represented as a group of computer programs.

Dark Star (暗黒星 Ankokusei) is a formula that predicts events and allows a person to change the world in any way, though its single flaw is the creator(s) eventually dying. This is the very reason that Akechi tries to stop Namikoshi from continuing development and usage of Dark Star.