is a Japanese racing driver who currently competes in Super Formula for ThreeBond Racing. Koide was the F4 Japanese Championship champion in 2022 and champion of Super Formula Lights in 2024, both achieved as part of the Honda Formula Dream Project.
In 2020 Koide made his debut in single-seater racing in the F4 Japanese Championship. He was originally scheduled to compete for the Honda Formula Dream Project team, but Honda withdrew its entry due to the COVID-19 pandemic in Japan. He ended up competing with Vegaplus from the second round onwards along with Kakunoshin Ohta. He finished the season in tenth.
In 2021, Koide continued to race in the F4 Japanese Championship with the Honda Formula Dream Project team. He took one race win and finished the season in sixth.
In 2022, Koide missed out on move to Super Formula Lights, and stayed with the team. Koide ended up winning the F4 Japanese Championship title ahead of his teammate Yusuke Mitsui. On his way to the title, he scored a total of nine race wins.
For 2023, Koide competed in Super Formula Lights with Toda Racing. In that season, he had over four wins, and seven podiums to date. Koide continued to compete in the series for the following year, as he moved to B-Max Racing Team. Koide won the Drivers' Championship with two races to spare, and took eight wins and three further podiums en route to his title, with his closest challengers Kobayashi and Nonaka only claiming three and five wins respectively.
Koide competed in the GT300-class of the 2023 Super GT Series with Team UpGarage alongside Takashi Kobayashi. Koide won his first GT300 race in the first round of the series in Okayama International Circuit. then he won as well in Suzuka. Koide continued to partner with Takashhi Kobayashi at Tean UpGarage for 2024.
Koide then stepped up to GT500 with Real Racing as he replaces Kakunoshin Ohta who moved to IMSA SportsCar Championship's GTP class.
Koide stepped up to Super Formula in 2025 and race with B-Max Racing Team as he replaces Iori Kimura.
<sup>*</sup> Season still in progress.<br> â¡ Team standings
() (Races in bold indicate pole position) (Races in italics indicate fastest lap)
() (Races in bold indicate pole position) (Races in italics indicate fastest lap)
() (Races in bold indicate pole position; races in italics indicate fastest lap)
<sup>â¡</sup> Half points awarded as less than 75% of race distance was completed.<br> <sup>(Number)</sup> Driver did not take part in this sprint race, points are still awarded for the teammate's result.<br> <sup>*</sup> Season still in progress.
<sup>*</sup> Season still in progress.