Hokuto Shinken
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, with additional styles utilising elements such as air currents to cut opponents from a distance. 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. With the exception of the Last General of Nanto, who uses no martial art, each Nanto master is trained in a style of Nanto Seiken named after a bird.