Katsuo Okazaki (岡崎 勝男, Okazaki Katsuo?, 10 July 1897 – 10 October 1965) was a Japanese political figure. He served as Consul-General in Nanjing after the Fall of Nanking to the Imperial Japanese Army and during the Nanking Massacre. In October 1939 was appointed Japanese Consul at Hong Kong, a position he held until January 1941.
He was present at the beginning of surrender negotiations between the Japanese emissaries and American military officials on Iejima in 1945.
After the war, Okazaki served as Foreign Minister between 1952 and 1954. In 1954, building on work by Ikeda, Okazaki signed a Mutual Security Assistance (MSA) Agreement with U.S. Ambassador John Allison.
Okazaki participated in the 1924 Paris Olympic Summer Games, qualifying for the 5,000 m final with a time of 15.22.2e. In the final, he fainted in the heatwave and was carried away by medics.
He is the grandfather of the Japanese and United States of America figure skater Kyoko Ina