Based on his training in boxing, wrestling, savate, early Judo at the Kodokan in Tokyo, and fights he was involved in during his police work, Fairbairn began to develop his own system of hand to hand combat, calling it "Defendu".
The next step in his evolution came in the form of internships at Tenri University, in Japan, and at the Kodokan, the traditional Judo academy established by Judo founder Jigoro Kano.
Proficient in Kodokan judo, Naito joined the university’s wrestling team, and soon became its captain, with the nickname of “Tiger Naito”.
On October 17, 1903, a Kodokan leader named Yoshiaki Yamashita gave demonstrations of judo at the Seattle Theatre.
He worked with a Judo committee to get US Grand Champion and future Olympic Bronze Medalists Allen Coage (who became wrestler Bad News Brown) a full scholarship to the Kodokan.
Okada won the Kodokan Cup again in 1992 before facing Yoshio Nakamura in the 1994 All-Japan Championships.
Judo Canada, formerly known as The Canadian Kodokan Black Belt Association, is the non-profit national governing body of the Japanese martial art and combat sport Judo in Canada, and a federation of Judo associations in each of the ten provinces and three territories.
He was coached in Kodokan judo by EJ Harrison, and received his shodan grading before leaving for England to study medicine.
Notable individuals who were directly influenced by Sadakazu Uyenishi's teaching included William Garrud, whose book "the Complete Jujitsuan" (published in 1914) became a standard reference work on the subject; Edith Garrud, who went on to establish jujitsu classes for members of the militant Suffragist movement; and Mrs. Emily Watts, whose 1906 book The Fine Art of Jujitsu was the first English work to record Kodokan judo kata.