REIKON

, short for is a subdivision of Kirigakure's ANBU currently lead by Gen'yō. They are also called the due to the unscrupulous nature of the missions they carry out.

History
In the aftermath of Yagura's reign and the years of the Bloody Mist, Kirigakure's political and military organization was in shambles. A certain shinobi, by the name of Genshun saw the need for a powerful militarist group that could act in the best interests of the village. Other shinobi were of similar opinion, and banded together to form a group that would later be known as REIKON. In the years following its founding, REIKON served Kirigakure as a clandestine special forces organization, carrying out retributive missions, various assassinations, and gathering intelligence on foreign villages and countries. They developed an alliance with the samurai of the Land of Iron, an alliance which stands to this very day. REIKON quickly gained a reputation as powerful organization whose members were not to be trifled with.

At some point, REIKON attempted to create an elite force of genetically-enhanced shinobi, codenamed. This was done by chemically altering the cells of the ninja so they would produce more chakra, as well as giving the ninja durability and strength that far exceeded those of a normal human. The plan was initially successful, yielding highly impressive results from the test subjects. The experimental ninja were deployed on various missions, and completed them with an extremely high success rate. However, information about the project was leaked, resulting in REIKON having to erase all traces of it and kill the genetically enhanced ninja.

Overview
"We are the Sin-Eaters. It means we take the moral excrement that comes with being a ninja and bury it deep inside us so the rest of our cause can stay pure. We are morally indefensible and absolutely necessary."

- Gen'yō addressing members of REIKON

REIKON is an elite organization that consists of only "the smartest, the toughest, and the meanest" shinobi. They serve as Kirigakure's primary intelligence-gathering agency, and they carry out assassinations and interrogation of enemy shinobi. REIKON is also responsible for revenging any wrongs done to Kirigakure or its shinobi. The missions which this organization undertakes are usually very unethical, sometimes involving kidnapping and torture of children, brainwashing, and a host of other questionable activities.