Formed in 2003 in Osaka Prefecture, the group centers its work around the concept of "madness inside a human" (人間の内面における狂気 ningen no naimen ni okeru kyōki). 12012 is also the penal code for the possession of a dangerous weapon in California. The group sometimes performs as "kyōki shoji" (凶器所持), which is a translation of that offense. They are a visual kei band, and consider their appearance as part of they way they express their music.
--Wikipedia