Training in Ninjutsu
Ninjutsu is an old system with roots deep in Japan's history. Today, Ninjutsu is practised around the world under various master teachers and in various schools. Bujinkan Ninjutsu is headed by Soke Hatsumi who was taught by Takamatsu Sensei.
There are teachers worldwide who can pass this art on to you if you have the will and the tenacity to stick with it. If possible, you should also consider training in Japan.
Training in Ninjutsu involves learning rolls, breakfalls, locks and strikes. It also involves learning both armed and unarmed combat. As with other arts, it also involves learning various kamae and kata.
Please also take time to read the rules of the Bujinkan.