Hi,
The Bujinkan is headed by Hatsumi Sensei, and as stated teaches from nine seperate traditional Japanese Martial Arts, some of which are ninjutsu, and some of which are samurai systems.
The curriculum will vary from school to school, and teacher to teacher, but will most often include striking (hand/arm strikes, kicks, blocking methods, body strikes, and more), grappling (throws, limb controls, chokes, pins, submissions etc), ground fighting (striking, grappling from the ground, as well as techniques performed from a seated position), a wide range of weaponry (bladed, flexible, impact, projectile, hidden, distraction etc), footwork/body positioning (evasive, offensive, defensive etc), defence against weapon attacks (modern such as knife, baton, gun, traditional such as staff, sword, spear, short sword etc), defence against group attacks, and in most schools, modern self defence (goshinjutsu). In addition, there is a great deal of other knowledge (such as stealth movements, tracking, water techniques, principles of nature, disguise, meteorology etc), so it isn't really something that can be easily described. Even with this list, it really doesn't do anything to give you an idea of the art itself. Honestly, go and see how you feel about the art, the school, and the teacher. It's the only way to know. Enjoy!