Super GT GT300 (2018–2019) Miyata made his debut in Super GT in 2018, driving in the GT300 class for
Lexus customer team
LM corsa. At 18 years old, he recorded his first podium finish at
Chang International Circuit in
Buriram, Thailand, where he and co-driver
Hiroki Yoshimoto finished third.
LM corsa changed tyre suppliers from
Yokohama to
Dunlop in 2019, and Miyata returned for his second season. In the sixth round at Autopolis, Miyata took his first career win after a late-race charge from Yoshimoto to take the lead with four laps to go. Miyata and Yoshimoto also won both races of the
auto sport Web Sprint Cup, a GT3 and GT300-only support race held during the inaugural Super GT x DTM Dream Race weekend at Fuji Speedway. Earlier that season, Miyata made his one-off GT500 debut at the Fuji GT 500 km Race, when he substituted for
Kazuki Nakajima at TOM'S, driving the number 36
Lexus LC 500 alongside
Yuhi Sekiguchi.
GT500 (2020–2023) In 2020, Toyota Gazoo Racing confirmed that Miyata would step up to GT500 full-time with
TGR Team WedsSport Bandoh, driving the new
Toyota GR Supra GT500 alongside
Yuji Kunimoto. Miyata scored five top-ten finishes including a best finish of seventh place in round five at Fuji. Miyata remained at the WedsSport Bandoh team for a second season in 2021. He scored his first pole position at the Fuji 500 km, and finished second at the following round in Motegi for his first GT500 podium. Miyata and Kunimoto would finish second again in the seventh round at Motegi, ending the season 11th in the drivers' standings. After two seasons, Miyata transferred to TOM'S for the 2022 season. He joined the number 37 team, replacing
World Endurance Championship-bound
Ryō Hirakawa and forming a new partnership with his one-time F3 rival Sacha Fenestraz. The combination of Miyata and Fenestraz had an impressive season highlighted by both drivers' first career GT500 wins, during the Fuji GT 450 km Race in August. Miyata and Fenestraz finished sixth in the drivers' championship with six top-ten finishes and two podiums. In 2023, Miyata moved over to the number 36 car, this time on a permanent basis with Sho Tsuboi as his co-driver. Miyata and Tsuboi won the Golden Week 450 km race at Fuji in only their second race together, then finished second in the following round at Suzuka. The pair won their second race at Autopolis in the penultimate round of the season, which gave them a seven-point lead going into the final race at Motegi. Late in the race, Miyata was running in second place, which would have given TOM'S the championship ahead of NDDP Racing drivers
Katsumasa Chiyo and Mitsunori Takaboshi. Takaboshi spun off while leading, and Miyata took the lead with five laps to go. Miyata and Tsuboi clinched the championship with their third win of the season. This made Miyata the fifth driver to win both the Super GT GT500 and Super Formula championships in the same year, joining
Pedro de la Rosa (1997),
Satoshi Motoyama (2003),
Richard Lyons (2004), and
Naoki Yamamoto (2018 and 2020).
Super Formula (2020–2023) Due to
Kazuki Nakajima's commitments in the
FIA World Endurance Championship and the travel restrictions mandated during the
COVID-19 pandemic, Miyata made his Super Formula championship debut in 2020, replacing Nakajima at Vantelin Team TOM'S for two races. He qualified on the front row for his series debut at
Okayama International Circuit, finished ninth in the race, then finished eighth in his second start at
Autopolis. After winning the Super Formula Lights championship, Miyata earned a full-time Super Formula drive with TOM'S in 2021, replacing the departing
Nick Cassidy. Miyata had six top-ten finishes in seven races, and finished tenth in the championship with a best finish of fourth in a rain-shortened race at Autopolis. Miyata took another step forward in 2022, the last season for the
Dallara SF19 chassis. He got his first podium finish, a third place, in the second round at Fuji. He finished the season with another third place in the final round at Suzuka, and was fourth in the final championship standings. The new
Dallara SF23 made its debut in 2023, Miyata's fourth season in Super Formula. In the third round of the season at Suzuka, Miyata took his first career win. He got his second win in round five at Sugo, ahead of two-time series champion
Tomoki Nojiri. A third-place finish at the season-ending
JAF Grand Prix at Suzuka was enough for Miyata to clinch the championship ahead of
Red Bull Racing reserve driver
Liam Lawson and Nojiri. Miyata scored a total of six podium finishes and finished all nine races inside the top five. == FIA Formula 2 career (2024–) ==