In the semi-finals of the Tokyo Olympics and the men's 400-meter hurdles on land, Daimu Yamauchi, who participated in the 3rd group, finished 6th in 49.35 seconds.
Yamauchi did not make it to the top two in each group, and did not make it to the top two in the overall time of third or less, so he did not advance to the final at the first Olympics.