The current belt ranking system of Bujinkan ninpo taijutsu is a kyu-dan system. Currently there are 10 kyu grades and 15 dan ranks. The five additional grades above 10th dan represent the 5 elemental manifestations of earth, water, fire, wind and void.

Dr. Masaaki Hatsumi was born in Noda City, Chiba Prefecture on December 2, 1931. Every year, on his birthday, he hosts a training event in Japan referred to as the "Daikyomosai".

Bujinkan means "divine warrior training hall".

The six original shihan of Soke Masaaki Hatsumi are: Manaka Shihan, Ishizuka Shihan, Tanemura Shihan, Kobayashi Shihan, Senno Shihan and Oguri Shihan.