 is an assassination art that is characterized as the polar opposite to the Hokuto Shinken style.Whereas Hokuto Shinken destroys enemies from within through the use of the "keiraku hikō" vital points, Nanto Seiken teaches its practitioners to kill with sheer force through the use of stabbing and slicing techniques.The Nanto Seiken school has branched out to 108 sects, with the six top masters of these sects being known as the , whose fates are intertwined to a star within the Nanto constellation.