[citation needed] From 2009, 2010 Kunimoto competed in Japanese Formula 3 Championship with TOM'S where he clinched third place, and as a champion the next year.

Kunimoto then step up to GT500 with Kraft in 2012 with Andrea Caldarelli new to the series, as the pair clinch 1 podiun in the season.

After that he is the main driver for Bandoh for four seasons, with Kenta Yamashita, Sho Tsuboi, Ritomo Miyata, and Sena Sakaguchi as his teammate.

[8] Kunimoto then won the series title in 2016 with his maiden two wins and four podiums, as he beats Andre Lotterer by three points.

[1] Kunimoto made a wildcard debut with Toyota Gazoo Racing for 2017 24 Hours of Le Mans.