The Bujinkan is an international martial arts organisation based in Noda, Japan and headed by Masaaki Hatsumi. Often refrred to as Ninjutsu the system called Bujinkan Budo Taijutsu is derived from nine distinct schools or ryuha.

Togakure Ryu Ninpo Taijutsu
Kukishinden Ryu Happo Hikenjutsu
Gikan Ryu Koppojutsu

Gyokko Ryu Kosshijutsu
Shinden Fudo Ryu Dakentaijutsu
Gyokushin Ryu Ninjutsu
Koto Ryu Koppojutsu
Takagi Yoshin Ryu Jutaijutsu
Kumogakure Ryu Ninjutsu
These schools pre-date most of the more modern martial arts by hundreds of years and originate from the battlefields of medieval Japan.

The training includes:
koshijutsu
koppojutsu
jutaijutsu
dakentaijutsu
happo bikenjutsu
ninjutsu 
 - pressure point & muscle attacks /  tears & joint dislocations
 - bone ( structure) breaking
 - throwing, grappling, ground fighting
 - striking
 - various modern & traditional weapons
 - ninpo tactics and strategies
 
Students are encouraged through their training to become aware of the endless possibilities and potential outcomes of any given situation and not to rely on techniques and tricks or be constrained by rules. There is no competition or sporting aspect to this martial art only continual personal development achieved through perserverance, responsibility and an open mind.