http://www.akban.org/wiki/index.php/Portal:Budo_Ninjutsu Part of the AKBAN-wiki project.One method of using Ganseki (underhook) in sparring. akban, arts, bjj, brazilian, bujinkan, fitness, genbukan, himum, ittai, jinenkan, jitsu, jiu, martial, mma, ninja, ninjitsu, ninjutsu, sport, yossi