Fukuda Hachinosuke was Jigoro Kano's first martial arts teacher, instructing the young Kano in Tenjin Shinyo-ryu jujutsu. His emphasis on randori (free practice) over kata-only training profoundly influenced Kano's later development of judo. Fukuda's early death in 1880 left Kano to seek other teachers, but the foundational principles he instilled shaped the art that would become one of the world's most practiced martial arts.