Sensei Arie van den Akker was born in 1966 in the city of Boornbergum (Netherlands) he is a Ninja master from the Kuroi Ryu Ninjutsu Tradition a clan of Koga Ninja. He is fighting a full contact sparring boxing match against his Sensei , Shidosdhi Andreas Leffler. Sensei Arie van Den Akker has founded Modern Ninjitsu , Ninja Kids and the Kurokumo Bushido Academy Holland and the ZVCNoord Martial Arts Academy. For Realistic Ninjutsu Training