is a Japanese manga series written and illustrated by Tooru Fujisawa, the creator of Great Teacher Onizuka. It was serialized in Kodansha's Afternoon in 2003 and collected into 3 tankōbon volumes. An anime television series adaptation animated by AIC Spirits and Group TAC first aired in Japan on April 15, 2006 and ran for 13 episodes. The manga was licensed in North America by Tokyopop, who released the first volume on July 15, 2008. The anime was licensed in the United States and United Kingdom by Manga Entertainment, with its first DVD released on March 20, 2007, and in Australasia by Madman Entertainment. In the US, Sci Fi (now Syfy) aired Tokko in 2007, in 2010 it aired on Chiller. Synopsis Officially known to the general public as Special Mobile Investigation Forces Section 2; Special Public Safety Task Force, or Tokko under the supervision of the Public Security Intelligence Agency after the Special Mobile Investigation Troops relinquished, with some of its members recruited from the police force. It was established after the Machida massacre was secretly investigated to discover that the perpetrators were demons, called Phantoms, from the netherworld, able to cross into reality when the "Box of Dirge" (or "Druj", as the DVD English subtitles say) was broken, with each of the 108 pieces being taken by a powerful Phantom. Under the command of Superintendent Ryoko Ibuki, she recruited members, who, as survivors of the Machida massacre, have Phantoms inside them that when "awakened", grant the superhuman speed and the ability to materialize swords. They use swords to dispatch the Phantoms and their lesser human faced larva parasites, that come into the world through the giant holes caused by unnatural earthquakes in Japan's Kanto region, since most firearms do not incapacitate or kill them. Their actions have come under harsh criticism from other officers for conducting their operations in secretive manners and for covering up the deaths of either civilians or police officers, informing the public via news releases that deaths or injuries caused by demons were done by armed or insane criminals. All members of Section 2 bear a tattoo (except for Ibuki who is not a symbiont). This is their "symbiont tattoo", which marks them as carriers of a "phantom", one of the 108 demons. Not all of the symbionts are with Section 2. A symbiont may be good or evil, but the spirit's alignment is unknown