Soke Hatsumi's Bujinkan teachings center on the concept of "being Zero," a state of mental emptiness allowing for spontaneous adaptation to any situation.

This aligns with the principle of Banpen Henka (infinite variations), emphasizing adaptability over technique accumulation. True mastery, therefore, involves self-reflection and humility, constantly emptying oneself of preconceived notions to embrace new possibilities.

This journey of becoming "Zero" is a continuous process of learning and growth.