Ninjutsu Bujinkan Budo Taijutsu. Black Belt NINJA Training Video Blog from Ninja Learning Network Ninjutsu and Bujinkan are martial arts related to the Ninja and Samurai. These free ninja training black belt video clips help students learn about black belt self defense and martial art training. These free ninja training videos are for information and entertainment only. Do not re-enact anything without direct supervision by a trained professional. Consult your physician. Ninja training is dangerous and we are not responsible for any liabilities, injuries or damages suffered by anyone emulating the content of these videos. Do not rely on these techniques for self-defense.