A black operation or black op is a covert or clandestine operation by a government agency, a military unit or a paramilitary organization; it can include activities by private companies or groups. Key features of a black operation are that it is secret and it is not attributable to the organization carrying it out.

noun. Often black ops . a secret mission or campaign carried out by a military, governmental, or other organization, typically one in which the organization conceals or denies its involvement: Some national intelligence agencies use black ops to undermine enemy governments.

Sadako DX is probably a second timeline in the Raisen canon, but there was no need for it. The film discards a lot about the original Sadako mythology to present something modern and updated. What could have been something to present a new perspective on Ringu ends up being a very poorly developed concept.

Did you know. This is a sequel to Sadako 3D (2012), which, in turn, was a sequel to Spiral (1998).