[2][3] Miura won the 3000m steeplechase at the Ready Steady Go event at the Olympic Stadium, Tokyo on the 9 May 2021.

Miura's winning time of 8:17:46 took more than a second off the national record of 8:18.93 set by Yoshitaka Iwamizu at the 2003 World Championships in Athletics in Paris.

In running this time, he became the first man to break a national record at the new stadium in Tokyo.

[4] On 26 June 2021, Miura set a new national record of 8:15.99 at Yanmar Stadium Nagai, Osaka.

He competed at the 2024 Summer Olympics in Paris in the 3000 metres steeplechase, placing eighth in the final.