首都大学東京
Ono graduated from Tokyo Metropolitan University with a Bachelor of Science from the Department of Industrial Chemistry. Shortly thereafter in April 1970, Ono joined the Japan Patent Office, studying abroad in the United States in 1978 and 1979. In 1998, Ono became the Director-General of the Fourth Examination Department, overseeing chemicals. Ono served as the Director-General of the Appeals Department from 2001 to 2002. In June 2002, Ono was appointed deputy director of the Japan Patent Office, a position he filled until October 2005.