Hatsumi was born in Noda, Chiba on December 2, 1931. During his school years, he heavily participated in sports, along with martial arts and theater, and became "captain of the football team". While attending the Meiji University, he continued learning judo and eventually rose to Yudansha or Dan rank. He also began teaching Judo during his time at the university to American soldiers at the nearby Yokota Air Base. After graduating, Hatsumi began to search for a teacher to further his study of martial arts. He began his Kobudo training under Ueno Chosui. When he was 26 he met Ueno's teacher, Toshitsugu Takamatsu, known as "the Tiger of Mongolia". Hatsumi was accepted as Takamatsu's student and spent fifteen years on Honshu Island learning various ninjutsu styles from Takamatsu and other members of the Takamatsu family, also he continued to learn judo, Shito Ryu karate, aikido, and kobudo.