[3] Okazaki participated in the 1924 Paris Olympic Summer Games, qualifying for the 5,000 m final with a time of 15.22.2e.

Okazaki took part in the surrender negotiations between the Japanese emissaries and American military officials on Iejima in 1945.

He was present as a representative of Japan at the formal surrender on 2 September 1945 aboard the USS Missouri.

In 1954, building on work by Ikeda, Okazaki signed a Mutual Security Assistance (MSA) Agreement with U.S.

[12] In 1961 he was called out of retirement to serve in the United Nations in what was described at the time as a move to strengthen the Japanese delegation.