[citation needed] Hiraki stepped up to Super GT in 2018 with Team Mach alongside Natsu Sakaguchi for 3 years.

[3] HELM Motorsports made their season debut in the GT300 class of Super GT in 2024.

Hiraki was joined by Kohei Hirate and his brother Reiji, who was the team's third driver.

[4][5] Hiraki alongside his older brother Yuya joined Super Formula Lights with their own team HELM Motorsports.

[6] Hiraki alongside his younger brother Reiji's HELM Motorsports made their debut in 2022 in Super Taikyu ST-X Class, with Yutaka Toriba as the third driver.