Bujinkan (japanese) means "the Divine Warror". (It can also be spelled "Bushinkan".)
Bujinkan is a martial art system put togather by soke Masaaki Hatsumi. This was done by combining the 9 ryu he is soke of. Three of these ryu are of pure ninjutsu, and from the beginning the system was called Bujinkan Ninpo Taijutsu. Later the ninpo was dropped, due to all the negativity regarding ninjas spread through movies and TV. Instead he renamed it to Bujinkan Budo Taijutsu, indicating that it contains more than ninjutsu.