In 1958 he found aikido and began seven intensive years of live-in study as an uchideshi with aikido founder Morihei Ueshiba, at the Aikikai Hombu Dojo alongside others like Yoshimitsu Yamada and Mitsunari Kanai. During this time, he also studied iaido. By 1960, Chiba earned the rank of 3rd dan, and was assigned to Nagoya to establish a branch school and serve as its full-time instructor. In 1962, he earned 4th dan and began teaching at the Hombu Dojo. Within three years, during which he taught at many local universities, Chiba completed his training as uchideshi, earning promotion to 5th Dan.
Chiba moved to Sunderland, England, in 1966. There he formed the Aikikai of Great Britain, which later changed its name to the British Aikido Federation. In 1970, he received 6th dan and was awarded the title of shihan. In 1975, he returned to Japan to serve as Secretary of the International Department at the Hombu Dojo. During this time he also studied zen meditation in Shizuoka Prefecture. In 1981, Chiba accepted an invitation from the United States Aikido Federation to move to San Diego, California, where he formed the San Diego Aikikai. Currently he is Chairman of the Teaching Committee of Birankai International.