is a Japanese racing driver who last competed for JLOC in Super GT.
Career Sakaguchi made his single-seater debut in 2012, racing in the Super FJ Suzuka Series, finishing fourth in points after winning the season finale. After finishing second in the Japanese Grand Prix-supporting Super FJ Challenge Cup the following year, Sakaguchi was awarded the Honda SRS-F scholarship to compete in JAF Formula 4 in 2014. Following a sixth-place points finish in the overall standings in JAF Formula 4, Sakaguchi made a one-off return to the Super FJ Suzuka Series, winning from pole position for Take First.
Following one year on the sidelines, Sakaguchi made his racing return in 2017 by joining Team Mach in the GT300 class of Super GT alongside Kiyoto Fujinami. At Autopolis, Sakaguchi finished eighth, scoring his first points in the series and the team's first in seven years. Remaining with Team Mach for 2018, Sakaguchi was joined by Yuya Hiraki for his second season in the series. At the penultimate round of the season at Autopolis, Sakaguchi ran as high as second and finished the race a then-career best seventh.
In 2019, Sakaguchi was retained by Team Mach alongside Hiraki. Three rounds into the season, Sakaguchi took his maiden podium in GT300, finishing second at Suzuka and taking Team Mach's best result in Super GT. Sakaguchi remained with Team Mach for 2020, pairing up with Hiraki for the third season in a row. At the opening round of the season at Fuji, Sakaguchi scored his second career podium by finishing third, which enabled him to end the season 14th in the standings.
After spending four seasons with Team Mach, Sakaguchi switched to JLOC for 2021, partnering Kosuke Matsuura. Sakaguchi's best result of the season came at Sugo, where he finished fourth in what was his only points scoring result of the season. During 2021, Sakaguchi also won the Fuji 24 Hours overall. Sakaguchi remained with JLOC and Matsuura for the 2022 season. Having finished in the points three times in the first part of the season, Sakaguchi scored a podium at Motegi, finishing runner-up in the season-finale. In early 2023, JLOC retained both Sakaguchi and Matsuura for that year's Super GT season. At the fifth round of the season at Suzuka, Sakaguchi took his fourth career podium by taking second place behind Team UpGarage.
For the third consecutive season, JLOC retained the Sakaguchi-Matsuura pairing for their number 87 car. Having qualified second for the Fuji 350km race, Sakaguchi finished sixth in his last race with the Huracan Evo before switching to the Evo2 from the fifth round onwards. With the Evo2, Sakaguchi finished fourth in the penultimate round of the season at Motegi and ended the season 11th in the standings. Ahead of the 2025 season, it was announced that Sakaguchi would remain with JLOC and Matsuura as they would drive the Huracan Evo2 for the full season. In his first full season with the Huracan Evo2, Sakaguchi scored a best result of seventh at Okayama as he ended the year 20th in points.
Sakaguchi remained with JLOC for the following year, as he became the team's reserve driver.
Racing record Racing career summary SeasonSeriesTeamRacesWinsPolesF/LapsPodiumsPointsPosition 2012 Super FJ – Suzuka Series 6 1 0 0 1 50 4th 2013 F1 Grand Prix Super FJ Challenge Cup ART GP Japan 1 0 0 0 1 N/A 2nd2014 JAF Formula 4 East - FC HFDP Racing 5 0 –** –** 0 42 6th JAF Formula 4 West - FC 6 0 –** –** 2 55 5th JAF Formula 4 Overall - FC 11 0 –** –** 2 97 6th 2015 Super FJ – Suzuka Series Take First 1 1 0 0 1 20 9th 2017 Super GT – GT300 Team Mach 7 0 0 0 0 3 23rd 2018 Super GT – GT300 Team Mach 7 0 0 0 0 4 20th 2019 Super GT – GT300 Team Mach 7 0 0 0 1 15 21st2020 Super GT – GT300 Team Mach 8 0 0 0 1 19 14th Super Taikyu – ST-X GTNET Motor Sports 1 0 0 0 1 82.5‡ 3rd‡2021 Super GT – GT300 JLOC 8 0 0 0 0 8 20th Super Taikyu – ST-X GTNET Motor Sports 1 1 0 0 1 82‡ 4th‡2022 Super GT – GT300 JLOC 8 0 0 0 1 23 15th Super Taikyu – ST-X GTNET Motor Sports 5 1 0 4 3 97.5‡ 4th‡2023 Super GT – GT300 JLOC 8 0 0 0 1 19 15th Super Taikyu – ST-X GTNET Motor Sports 6 0 0 2 2 89‡ 5th‡2024 Super GT – GT300 JLOC 8 0 0 1 0 26 11th Super Taikyu – ST-X GTNET Motor Sports 5 1 2 3 2 107.5‡ 5th‡ Toyota Gazoo Racing GR86/BRZ Cup 4MINUTES Co., Ltd. R&D 8 0 0 0 0 0 NC2025 Super GT – GT300 JLOC 8 0 0 0 0 29 20th Super Taikyu – ST-X GTNET Motor Sports 3 0 0 0 0 26‡ 5th‡ SRO Japan Cup – GT3 Galah Racing With GTNET 2 0 0 0 0 0 NC 2026 Super GT – GT300 JLOC Super Taikyu – ST-XGTNET MotorSports SRO Japan Cup – GT3 Pro-Am GalahRacing 2 0 0 0 0 8 12thSources:
‡ Team standings
** The FC class was a class using modified Formula Challenge Japan's FC106 chassis and running with the JAF Formula 4's "C" class, an upper grade class. So, there were neither pole position nor fastest lap.
Complete Super GT results (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) YearTeamCarClass123456789DCPts 2017 Team Mach Toyota 86 MC GT300OKAFSWAUTSUGFSWSUZ CHATRM23rd3 2018 Team Mach Toyota 86 MC GT300 OKA FUJ SUZ CHA FUJ SUG AUT MOT 20th 4 2019 Team Mach Toyota 86 MC GT300 GT300 OKA FUJ SUZ CHA FUJ AUT SUG MOT 21st 15 2020 Team Mach Toyota 86 MC GT300 GT300 FUJ FUJ SUZ MOT FUJ SUZ MOT FUJ 14th 19 2021 JLOC Lamborghini Huracán GT3 Evo GT300OKAFSWTRMSUZSUGAUTTRMFSW 20th 8 2022 JLOC Lamborghini Huracán GT3 Evo GT300OKAFSWSUZFSWSUZSUGAUTTRM 15th 23 2023 JLOC Lamborghini Huracán GT3 Evo GT300OKAFSWSUZFSWSUZSUGAUTTRM 15th 192024JLOC Lamborghini Huracán GT3 EvoGT300OKAFSWSUZFSW11th26 Lamborghini Huracán GT3 Evo2SUGAUTMOTSUZ 2025 JLOC Lamborghini Huracán GT3 Evo2 GT300 OKA FUJ SEP FS1 FS2 SUZ SUG AUT MOT 20th 29
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