# 2021 Super GT Series

The 2021 Autobacs Super GT Series was a motor racing championship based in Japan for grand touring cars. The series is sanctioned by the Japan Automobile Federation (JAF) and run by the GT Association (GTA). It was the twenty-ninth season of the Japan Automobile Federation Super GT Championship which includes the All Japan Grand Touring Car Championship (JGTC) era, and the seventeenth season under the Super GT name. It was the thirty-ninth overall season of a national JAF sportscar championship, dating back to the All Japan Sports Prototype Championship.
TGR Team au TOM'S and drivers Yuhi Sekiguchi and Sho Tsuboi won the GT500 class championships, driving the Toyota Supra, after overcoming a 16-point deficit in the final round of the season. The titles were secured in controversial circumstances as championship leader Naoki Yamamoto of Team Kunimitsu was taken out from a title-clinching position by GT300 class driver Ren Sato with 15 laps remaining in the final race of the season. Driving the new Subaru BRZ, Takuto Iguchi and Hideki Yamauchi won the GT300 class championships for R&D Sport, giving Subaru their first-ever title in Super GT competition. It was also the first drivers' title for both Iguchi and Yamauchi, and the first for the R&D Sport team.

## Calendar

A provisional eight-round 2021 calendar was announced on 7 August 2020. Autopolis, Okayama International Circuit, and Sportsland Sugo returned to the calendar after a year's absence. The Fuji GT 500km Race also returned to its traditional calendar slot on the Golden Week holiday of 3-4 May.
On 9 February 2021, the planned rounds at Chang International Circuit in Thailand and Sepang International Circuit in Malaysia were cancelled due to travel restrictions. A revised schedule was released on the same day with all eight rounds being held in Japan, and with the addition of an additional round at Fuji Speedway in November and Twin Ring Motegi in July. On 11 May 2021, the third round at Suzuka International Racing Course, which had been set to take place on 30 May as the third round of the championship, was postponed indefinitely due to a renewed wave of COVID-19 cases in Japan. The race was subsequently rescheduled to 22 August.

### Circuits and dates

| Round | Event | Circuit | Dates |
| 1 | Takanokono Hotel Okayama GT 300km Race | Okayama International Circuit | 10-11 April |
| 2 | Takanokono Hotel Fuji GT 500km Race | Fuji Speedway | 3-4 May |
| 4 | Motegi GT 300km Race | Twin Ring Motegi | 17-18 July |
| 3 | Fujimaki Group Suzuka GT 300km Race | Suzuka Circuit | 21-22 August |
| 5 | Sugo GT 300km Race | Sportsland Sugo | 11-12 September |
| 6 | Autopolis GT 300km Race | Autopolis | 23-24 October |
| 7 | Motegi GT 300km Race | Twin Ring Motegi | 6-7 November |
| 8 | Fujimaki Group Fuji GT 300km Race | Fuji Speedway | 27-28 November |

## Teams and drivers
### GT500

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Team Kunimitsu | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 1 | Naoki Yamamoto | B | All |
| Team Kunimitsu | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 1 | Hideki Mutoh | B | 1–2 |
| Team Kunimitsu | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 1 | Tadasuke Makino | B | 2–8 |
| NDDP Racing with B-Max | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 3 | Kohei Hirate | M | All |
| NDDP Racing with B-Max | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 3 | Katsumasa Chiyo | M | All |
| ARTA | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 8 | Tomoki Nojiri | B | All |
| ARTA | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 8 | Nirei Fukuzumi | B | All |
| Team Impul | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 12 | Kazuki Hiramine | B | All |
| Team Impul | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 12 | Nobuharu Matsushita | B | All |
| TGR Team Eneos ROOKIE | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 14 | Kazuya Oshima | B | All |
| TGR Team Eneos ROOKIE | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 14 | Kenta Yamashita | B | All |
| Team Red Bull Mugen | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 16 | Ukyo Sasahara | D | All |
| Team Red Bull Mugen | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 16 | Toshiki Oyu | D | All |
| Astemo REAL Racing | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 17 | Koudai Tsukakoshi | B | All |
| Astemo REAL Racing | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 17 | Bertrand Baguette | B | All |
| TGR Team WedsSport Bandoh | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 19 | Yuji Kunimoto | Y | All |
| TGR Team WedsSport Bandoh | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 19 | Ritomo Miyata | Y | All |
| NISMO | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 23 | Tsugio Matsuda | M | All |
| NISMO | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 23 | Ronnie Quintarelli | M | All |
| Kondo Racing | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 24 | Mitsunori Takaboshi | Y | All |
| Kondo Racing | Nissan | Nissan GT-R NISMO GT500 | Nissan NR4S21 2.0 L Turbo I4 | 24 | Daiki Sasaki | Y | All |
| TGR Team au TOM'S | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 36 | Yuhi Sekiguchi | B | All |
| TGR Team au TOM'S | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 36 | Sho Tsuboi | B | All |
| TGR Team KeePer TOM'S | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 37 | Ryō Hirakawa | B | All |
| TGR Team KeePer TOM'S | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 37 | Sena Sakaguchi | B | 1–5 |
| TGR Team KeePer TOM'S | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 37 | Sacha Fenestraz | B | 6–8 |
| TGR Team ZENT Cerumo | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 38 | Yuji Tachikawa | B | All |
| TGR Team ZENT Cerumo | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 38 | Hiroaki Ishiura | B | All |
| TGR Team SARD | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 39 | Heikki Kovalainen | B | All |
| TGR Team SARD | Toyota GR | Toyota GR Supra GT500 | Toyota RI4AG 2.0 L Turbo I4 | 39 | Yuichi Nakayama | B | All |
| Modulo Nakajima Racing | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 64 | Takuya Izawa | D | All |
| Modulo Nakajima Racing | Honda | Honda NSX-GT | Honda HR-420E 2.0 L Turbo I4 | 64 | Hiroki Otsu | D | All |

### GT300

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| muta Racing INGING | Lotus | Lotus Evora MC GT300 | GTA V8 4.5 L V8 | 2 | Hiroki Katoh | B | All |
| muta Racing INGING | Lotus | Lotus Evora MC GT300 | GTA V8 4.5 L V8 | 2 | Ryohei Sakaguchi | B | All |
| muta Racing INGING | Lotus | Lotus Evora MC GT300 | GTA V8 4.5 L V8 | 2 | Kazuto Kotaka | B | 2 |
| Goodsmile Racing & Team UKYO | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 4 | Nobuteru Taniguchi | Y | All |
| Goodsmile Racing & Team UKYO | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 4 | Tatsuya Kataoka | Y | All |
| Team Mach | Toyota | Toyota 86 MC GT300 | GTA V8 4.5 L V8 | 5 | Yuya Hiraki | Y | All |
| Team Mach | Toyota | Toyota 86 MC GT300 | GTA V8 4.5 L V8 | 5 | Reiji Hiraki | Y | All |
| Team LeMans with Motoyama Racing | Audi | Audi R8 LMS Evo | Audi DAR 5.2 L V10 | 6 | Satoshi Motoyama | Y | All |
| Team LeMans with Motoyama Racing | Audi | Audi R8 LMS Evo | Audi DAR 5.2 L V10 | 6 | Yoshiaki Katayama | Y | All |
| BMW Team Studie × CSL | BMW | BMW M6 GT3 | BMW S63B44 4.4 L Twin Turbo V8 | 7 | Seiji Ara | Y | All |
| BMW Team Studie × CSL | BMW | BMW M6 GT3 | BMW S63B44 4.4 L Twin Turbo V8 | 7 | Tomohide Yamaguchi | Y | All |
| Pacific - Car Guy Racing | Ferrari | Ferrari 488 GT3 Evo 2020 | Ferrari F154CB 3.9 L Twin Turbo V8 | 9 | Kei Cozzolino | Y | All |
| Pacific - Car Guy Racing | Ferrari | Ferrari 488 GT3 Evo 2020 | Ferrari F154CB 3.9 L Twin Turbo V8 | 9 | Takeshi Kimura | Y | 1–2, 5–6, 8 |
| Pacific - Car Guy Racing | Ferrari | Ferrari 488 GT3 Evo 2020 | Ferrari F154CB 3.9 L Twin Turbo V8 | 9 | Naoki Yokomizo | Y | 3–4, 7 |
| GAINER | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 10 | Kazuki Hoshino | D | All |
| GAINER | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 10 | Keishi Ishikawa | D | All |
| GAINER | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 11 | Katsuyuki Hiranaka | D | All |
| GAINER | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 11 | Hironobu Yasuda | D | All |
| Team UpGarage | Honda | Honda NSX GT3 Evo | Honda JNC1 3.5 L Twin Turbo V6 | 18 | Takashi Kobayashi | Y | All |
| Team UpGarage | Honda | Honda NSX GT3 Evo | Honda JNC1 3.5 L Twin Turbo V6 | 18 | Teppei Natori | Y | All |
| ARTA | Honda | Honda NSX GT3 Evo | Honda JNC1 3.5 L Twin Turbo V6 | 55 | Shinichi Takagi | B | All |
| ARTA | Honda | Honda NSX GT3 Evo | Honda JNC1 3.5 L Twin Turbo V6 | 55 | Ren Sato | B | All |
| Audi Team Hitotsuyama | Audi | Audi R8 LMS Evo | Audi DAR 5.2 L V10 | 21 | Shintaro Kawabata | Y | All |
| Audi Team Hitotsuyama | Audi | Audi R8 LMS Evo | Audi DAR 5.2 L V10 | 21 | Takuro Shinohara | Y | All |
| R'Qs Motor Sports | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 22 | Hisashi Wada | Y | 1–4, 6 |
| R'Qs Motor Sports | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 22 | Masaki Jyonai | Y | 1–4, 6 |
| R'Qs Motor Sports | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 22 | Ryosei Yamashita | Y | 2 |
| Arnage Racing | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 50 | Masaki Kano | Y | All |
| Arnage Racing | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 50 | Masataka Yanagida | Y | All |
| Hoppy Team Tsuchiya Max Racing | Porsche | Porsche 911 GT3 R | Porsche M98/80 4.2 L F6 | 25 | Takamitsu Matsui | Y | All |
| Hoppy Team Tsuchiya Max Racing | Porsche | Porsche 911 GT3 R | Porsche M98/80 4.2 L F6 | 25 | Kimiya Sato | Y | All |
| Hoppy Team Tsuchiya Max Racing | Toyota GR | Toyota GR Supra GT300 | Toyota 2UR-GSE 5.4 L V8 | 244 | Atsushi Miyake | Y | All |
| Hoppy Team Tsuchiya Max Racing | Toyota GR | Toyota GR Supra GT300 | Toyota 2UR-GSE 5.4 L V8 | 244 | Yuui Tsutsumi | Y | All |
| apr | Toyota GR | Toyota GR Sport Prius PHV apr GT | Toyota 2UR-GSE 5.4 L V8 | 30 | Hiroaki Nagai | Y | All |
| apr | Toyota GR | Toyota GR Sport Prius PHV apr GT | Toyota 2UR-GSE 5.4 L V8 | 30 | Manabu Orido | Y | All |
| apr | Toyota GR | Toyota GR Sport Prius PHV apr GT | Toyota 2UR-GSE 5.4 L V8 | 30 | Yuta Kamimura | Y | 2 |
| apr | Toyota GR | Toyota GR Sport Prius PHV apr GT | Toyota 2UR-GSE 5.4 L Hybrid V8 | 31 | Koki Saga | B | All |
| apr | Toyota GR | Toyota GR Sport Prius PHV apr GT | Toyota 2UR-GSE 5.4 L Hybrid V8 | 31 | Yuhki Nakayama | B | All |
| Yogibo Drago Corse | Honda | Honda NSX GT3 Evo | Honda JNC1 3.5 L Twin Turbo V6 | 34 | Ryo Michigami | Y | All |
| Yogibo Drago Corse | Honda | Honda NSX GT3 Evo | Honda JNC1 3.5 L Twin Turbo V6 | 34 | Shogo Mitsuyama | Y | All |
| arto Ping An Team Thailand arto Team Thailand | Lexus | Lexus RC F GT3 | Lexus 2UR-GSE 5.4 L V8 | 35 | Sean Walkinshaw | Y | All |
| arto Ping An Team Thailand arto Team Thailand | Lexus | Lexus RC F GT3 | Lexus 2UR-GSE 5.4 L V8 | 35 | Giuliano Alesi | Y | All |
| NILZZ Racing | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 48 | Yuki Tanaka | Y | All |
| NILZZ Racing | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 48 | Ryuichiro Tomita | Y | 1, 3 |
| NILZZ Racing | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 48 | Taiyou Iida | Y | 2, 4–5, 7–8 |
| NILZZ Racing | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 48 | Yudai Uchida | Y | 6 |
| Arnage Racing | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 50 | Masaki Kano | Y | All |
| Arnage Racing | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 50 | Masataka Yanagida | Y | All |
| Saitama Toyopet GreenBrave | Toyota GR | Toyota GR Supra GT300 | Toyota 2UR-GSE 5.4 L V8 | 52 | Hiroki Yoshida | B | All |
| Saitama Toyopet GreenBrave | Toyota GR | Toyota GR Supra GT300 | Toyota 2UR-GSE 5.4 L V8 | 52 | Kohta Kawaai | B | 1–2, 4–8 |
| Saitama Toyopet GreenBrave | Toyota GR | Toyota GR Supra GT300 | Toyota 2UR-GSE 5.4 L V8 | 52 | Taku Bamba | B | 3 |
| Kondo Racing | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 56 | Kiyoto Fujinami | Y | All |
| Kondo Racing | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 56 | João Paulo de Oliveira | Y | All |
| LM Corsa | Toyota GR | Toyota GR Supra GT300 | Toyota 2UR-GSE 5.4 L V8 | 60 | Hiroki Yoshimoto | D | All |
| LM Corsa | Toyota GR | Toyota GR Supra GT300 | Toyota 2UR-GSE 5.4 L V8 | 60 | Shunsuke Kohno | D | All |
| R&D Sport | Subaru | Subaru BRZ GT300 (ZD8) | Subaru EJ20 2.0 L Turbo F4 | 61 | Takuto Iguchi | D | All |
| R&D Sport | Subaru | Subaru BRZ GT300 (ZD8) | Subaru EJ20 2.0 L Turbo F4 | 61 | Hideki Yamauchi | D | All |
| K2 R&D LEON Racing | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 65 | Naoya Gamou | B | All |
| K2 R&D LEON Racing | Mercedes-AMG | Mercedes-AMG GT3 Evo | Mercedes-AMG M159 6.2 L V8 | 65 | Togo Suganami | B | All |
| JLOC | Lamborghini | Lamborghini Huracán GT3 Evo | Lamborghini DGF 5.2 L V10 | 87 | Kosuke Matsuura | Y | All |
| JLOC | Lamborghini | Lamborghini Huracán GT3 Evo | Lamborghini DGF 5.2 L V10 | 87 | Natsu Sakaguchi | Y | All |
| JLOC | Lamborghini | Lamborghini Huracán GT3 Evo | Lamborghini DGF 5.2 L V10 | 88 | Takashi Kogure | Y | All |
| JLOC | Lamborghini | Lamborghini Huracán GT3 Evo | Lamborghini DGF 5.2 L V10 | 88 | Yuya Motojima | Y | All |
| K-tunes Racing | Lexus | Lexus RC F GT3 | Lexus 2UR-GSE 5.4 L V8 | 96 | Morio Nitta | D | All |
| K-tunes Racing | Lexus | Lexus RC F GT3 | Lexus 2UR-GSE 5.4 L V8 | 96 | Hibiki Taira | D | 1–2, 4 |
| K-tunes Racing | Lexus | Lexus RC F GT3 | Lexus 2UR-GSE 5.4 L V8 | 96 | Kazuto Kotaka | D | 3, 5 |
| K-tunes Racing | Lexus | Lexus RC F GT3 | Lexus 2UR-GSE 5.4 L V8 | 96 | Sena Sakaguchi | D | 6–8 |
| Tomei Sports | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 360 | Takayuki Aoki | Y | All |
| Tomei Sports | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 360 | Yudai Uchida | Y | 1–5 |
| Tomei Sports | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 360 | Atsushi Tanaka | Y | 2, 6, 8 |
| Tomei Sports | Nissan | Nissan GT-R Nismo GT3 | Nissan VR38DETT 3.8 L Twin Turbo V6 | 360 | Takuya Otaki | Y | 7 |

### Vehicle changes
#### GT300 Class

* INGING Motorsport and Cars Tokai Dream28 merged into a collaborative entry in 2021, known as muta Racing INGING. The team retained the Lotus Evora MC GT300 vehicle, driver Hiroki Katoh, chief engineer Shintaro Watanabe, and the number 2 plate of Cars Tokai Dream28's entry. INGING brought on their Bridgestone tyre contract, title sponsor muta, and driver Ryohei Sakaguchi.
* Both LM Corsa and Max Racing switched from the FIA-GT3 specification Lexus RC F GT3 to the GT300 specification fifth-generation Toyota GR Supra for the 2021 season.
* Team LeMans returned to Super GT after a one-year absence, fielding an Audi R8 LMS Evo under the 'Team LeMans with Motoyama Racing' banner while also transfer from the GT500 to GT300 class.
* R&D Sport changed from the first-generation Subaru BRZ (ZC6) to the new second-generation BRZ (ZD8) for the 2021 season.
* Car Guy Racing returned to Super GT after a two-year absence, partnering with Pacific Racing Team to field a Ferrari 488 GT3 under the Pacific CarGuy Racing banner.

### Entrant changes
#### GT500 Class

* Honda: Honda announced their Super GT driver line-up on On 15 January 2020.
** Toshiki Oyu will be stepping up to GT500 to join Team Red Bull Mugen, replacing Hideki Mutoh. Team Red Bull Mugen changed tyre suppliers from Yokohama to Dunlop. Dunlop will supply multiple GT500 teams for the first time since 2010. Hirokatsu Tanaka replaced Shinji Nakano as team director.
** Stanley Electric replaced the defunct Raybrig brand as the title sponsor for Team Kunimitsu.
** Hitachi Astemo, a joint venture between Hitachi and Honda, replaced the defunct Keihin brand as title sponsor for Astemo Real Racing.
* Nissan: Nissan's GT500 line-up was announced on 18 January 2020.
** Nobuharu Matsushita, who made his series debut as a replacement driver for the injured Shinichi Takagi last year, signed with Nissan to compete for Team Impul alongside Kazuki Hiramine.
** Daiki Sasaki joined Kondo Racing for the first time since 2016, partnering with Mitsunori Takaboshi.
** Jann Mardenborough was not retained by Nissan for the 2021 season.
* Toyota: Toyota Gazoo Racing announced their Super GT driver line-up on 22 January 2020.
** At TOM's Racing, Sacha Fenestraz transferred from the number 36 to the number 37 entry, replacing Nick Cassidy, who left the series to compete in Formula E with Envision Virgin Racing. Sho Tsuboi transferred from TGR Team ROOKIE to the number 36 TOM's team.
** TGR Team ROOKIE became a self-sufficient team after being operated by Team Cerumo in 2020. Eneos replaced Wako's as their title sponsor. 2019 champion Kenta Yamashita returned to Super GT full-time, replacing Tsuboi at TGR Team ROOKIE - and reunited with former Team LeMans teammate Kazuya Oshima in the No. 14 car.

#### GT300 Class

* Three-time GT500 champion Satoshi Motoyama returned to the series after retiring from GT500 at the end of 2018, driving for the newly incorporated Team LeMans with Motoyama Racing (see Team Changes below).
* Two-time GT500 and GT300 champion Masataka Yanagida joined pro-am Mercedes-AMG customer team Arnage Racing, racing alongside amateur driver Masaki Kano.
* Former Ferrari Driver Academy prospect and Formula 2 driver Giuliano Alesi made his GT300 debut with arto Team Thailand. Alesi was initially signed as the team's third driver, but competed in all eight rounds after Nattapong Hortongkum was unable to enter Japan for a second consecutive year.
* 2019 F4 Japanese champion and 2020 French F4 Championship runner-up Ren Sato made his GT300 debut with Autobacs Racing Team Aguri, replacing Toshiki Oyu.
* Super Formula Lights driver Teppei Natori made his GT300 debut, replacing Kosuke Matsuura at Honda customer Team UPGarage.
* Yuui Tsutsumi, signed with Max Racing to compete full-time in 2021, after driving for three different teams (including Max Racing) as a substitute driver throughout 2020.
* 2020 TCR Japan Series champion Takuro Shinohara made his full-time GT300 debut with Audi Team Hitotsuyama, after competing part-time in 2020 for two different teams.
* JLOC signed GT500 veteran Kosuke Matsuura and GT300 podium finisher Natsu Sakaguchi to drive their number 87 Lamborghini Huracán GT3.
* Misato Haga, former team principal of Direxiv and the first woman to win a GT300 Championship as a team director, became the new team director of Drago Corse. Yogibo became the team's new title sponsor. Veteran GT300 driver Shogo Mitsuyama joined Yogibo Drago Corse, alongside owner/driver Ryo Michigami.
* Japanese F4 runner-up Reiji Hiraki made his GT300 debut with Team Mach, driving alongside his older brother Yuya.
* Super Formula Lights graduate Yoshiaki Katayama made his GT300 debut with Team LeMans with Motoyama Racing.
* D'station Racing withdrew from Super GT at the end of the 2020 season, as the team concentrate on FIA World Endurance Championship campaign. While the Pacific team linked up with CarGuy Racing, the owner Takeshi Kimura race with Kei Cozzolino.

### Mid-season changes
#### GT500 Class

* Sacha Fenestraz missed the first five races of the season due to difficulties acquiring a Japanese visa. Sena Sakaguchi replaced him at TGR Team KeePer TOM's for these five races, before Fenestraz returned for the sixth round at Autopolis.
* Tadasuke Makino missed the first race of the season due to meningitis. Hideki Mutoh replaced him at Team Kunimitsu for the first race at Okayama. Makino returned for the Fuji 500km in May, entered as a third driver alongside Yamamoto and Mutoh. From the following round at Motegi, Makino returned to the cockpit on a full-time basis.
* From the third race of the season at Motegi, TGR Team ZENT Cerumo chief engineer Kotaro Tanaka had taken over as team director from ace driver Yuji Tachikawa.

#### GT300 Class

* With Sena Sakaguchi driving in GT500, reigning FIA F4 Japanese Champion Hibiki Taira was called up to replace Sakaguchi at K-Tunes Racing. Taira drove in the first three races of the season.
* Before the fourth race at Suzuka, Taira was replaced at K-tunes Racing by Kazuto Kotaka, due to an undisclosed illness, which was later revealed to be a COVID-19 infection. Kotaka also drove in the fifth race at Sugo.
* Kohta Kawaai missed the fourth race of the season at Suzuka due to a positive COVID-19 test. 2011 GT300 champion Taku Bamba replaced Kawaai at Saitama Toyopet GreenBrave.
* 2012 GT300 champion Naoki Yokomizo replaced Takeshi Kimura at Pacific CarGuy Racing for rounds three, four, and seven due to Kimura's driving commitments in the FIA World Endurance Championship.
* arto Ping An Team Thailand changed its entry name back to arto Team Thailand after the first two races of the season, after Ping An Insurance abruptly ended its sponsorship of the team.
* R'Qs Motor Sports withdrew from the final two rounds after their car was heavily damaged in an accident during the sixth round at Autopolis.

## Results

The race at Suzuka Circuit was still promoted as the third round of the season, despite taking place after the July race at Twin Ring Motegi and being the fourth race of the season chronologically. Likewise, the July race at Motegi was still promoted as the fourth round of the championship, even though it was now the third race of the season chronologically. Drivers credited with winning Pole Position for their respective teams are indicated in bold text.
| Round | Circuit | Date | Class | Pole Position | Race Winner |
| 1 | Okayama International Circuit | 11 April | GT500 | No. 37 TGR Team Keeper TOM'S | No. 14 TGR Team Eneos ROOKIE |
| 1 | Okayama International Circuit | 11 April | GT500 | Ryo Hirakawa Sena Sakaguchi | Kazuya Oshima Kenta Yamashita |
| 1 | Okayama International Circuit | 11 April | GT300 | No. 11 GAINER | No. 56 Kondo Racing |
| 1 | Okayama International Circuit | 11 April | GT300 | Katsuyuki Hiranaka Hironobu Yasuda | Kiyoto Fujinami Joao Paulo de Oliveira |
| 2 | Fuji Speedway | 4 May | GT500 | No. 19 TGR Team WedsSport Bandoh | No. 17 Astemo REAL Racing |
| 2 | Fuji Speedway | 4 May | GT500 | Yuji Kunimoto Ritomo Miyata | Bertrand Baguette Koudai Tsukakoshi |
| 2 | Fuji Speedway | 4 May | GT300 | No. 61 R&D Sport | No. 60 LM Corsa |
| 2 | Fuji Speedway | 4 May | GT300 | Takuto Iguchi Hideki Yamauchi | Shunsuke Kohno Hiroki Yoshimoto |
| 3 | Twin Ring Motegi | 18 July | GT500 | No. 1 Team Kunimitsu | No. 1 Team Kunimitsu |
| 3 | Twin Ring Motegi | 18 July | GT500 | Naoki Yamamoto Tadasuke Makino | Naoki Yamamoto Tadasuke Makino |
| 3 | Twin Ring Motegi | 18 July | GT300 | No. 10 GAINER | No. 2 muta Racing INGING |
| 3 | Twin Ring Motegi | 18 July | GT300 | Katsuyuki Hiranaka Hironobu Yasuda | Hiroki Katoh Ryohei Sakaguchi |
| 4 | Suzuka Circuit | 22 August | GT500 | No. 64 Modulo Nakajima Racing | No. 23 NISMO |
| 4 | Suzuka Circuit | 22 August | GT500 | Takuya Izawa Hiroki Otsu | Tsugio Matsuda Ronnie Quintarelli |
| 4 | Suzuka Circuit | 22 August | GT300 | No. 61 R&D Sport | No. 244 Max Racing |
| 4 | Suzuka Circuit | 22 August | GT300 | Takuto Iguchi Hideki Yamauchi | Atsushi Miyake Yuui Tsutsumi |
| 5 | Sportsland Sugo | 12 September | GT500 | No. 8 ARTA | No. 12 Team Impul |
| 5 | Sportsland Sugo | 12 September | GT500 | Tomoki Nojiri Nirei Fukuzumi | Kazuki Hiramine Nobuharu Matsushita |
| 5 | Sportsland Sugo | 12 September | GT300 | No. 61 R&D Sport | No. 61 R&D Sport |
| 5 | Sportsland Sugo | 12 September | GT300 | Takuto Iguchi Hideki Yamauchi | Takuto Iguchi Hideki Yamauchi |
| 6 | Autopolis | 24 October | GT500 | No. 16 Team Red Bull Mugen | No. 8 ARTA |
| 6 | Autopolis | 24 October | GT500 | Ukyo Sasahara Toshiki Oyu | Tomoki Nojiri Nirei Fukuzumi |
| 6 | Autopolis | 24 October | GT300 | No. 31 apr | No. 31 apr |
| 6 | Autopolis | 24 October | GT300 | Yuhki Nakayama Koki Saga | Yuhki Nakayama Koki Saga |
| 7 | Twin Ring Motegi | 7 November | GT500 | No. 19 TGR Team WedsSport Bandoh | No. 8 ARTA |
| 7 | Twin Ring Motegi | 7 November | GT500 | Yuji Kunimoto Ritomo Miyata | Tomoki Nojiri Nirei Fukuzumi |
| 7 | Twin Ring Motegi | 7 November | GT300 | No. 18 Team UpGarage | No. 21 Audi Sport Team Hitotsuyama |
| 7 | Twin Ring Motegi | 7 November | GT300 | Takashi Kobayashi Teppei Natori | Shintaro Kawabata Takuro Shinohara |
| 8 | Fuji Speedway | 28 November | GT500 | No. 14 TGR Team Eneos ROOKIE | No. 36 TGR Team au TOM'S |
| 8 | Fuji Speedway | 28 November | GT500 | Kazuya Oshima Kenta Yamashita | Yuhi Sekiguchi Sho Tsuboi |
| 8 | Fuji Speedway | 28 November | GT300 | No. 61 R&D Sport | No. 60 LM Corsa |
| 8 | Fuji Speedway | 28 November | GT300 | Takuto Iguchi Hideki Yamauchi | Shunsuke Kohno Hiroki Yoshimoto |

## Championship standings
### Drivers' championships
#### Scoring system

| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | Pole |
| Points | 20 | 15 | 11 | 8 | 6 | 5 | 4 | 3 | 2 | 1 | 1 |

#### GT500

Driver Ranking GT500 2021 Series :
| Rank | Driver | Team | OKA | FUJ | MOT | SUZ | SUG | AUT | MOT | FUJ | Points |
| 1 | Yuhi Sekiguchi Sho Tsuboi | No. 36 TGR Team au TOM'S | 2 | 13 | 3 | 5 | 4 | 10 | 8 | 1 | 64 |
| 2 | Nirei Fukuzumi Tomoki Nojiri | No. 8 ARTA | 7 | 8 | 5 | 11 | 10 | 1 | 1 | 6 | 60 |
| 3 | Naoki Yamamoto | No. 1 Team Kunimitsu | 8 | 4 | 1 | 4 | 2 | 6 | 12 | 14 | 60 |
| 4 | Tadasuke Makino | No. 1 Team Kunimitsu | | 4 | 1 | 4 | 2 | 6 | 12 | 14 | 57 |
| 5 | Kazuya Oshima Kenta Yamashita | No. 14 TGR Team Eneos ROOKIE | 1 | 2 | 13 | 12 | 12† | 11 | 6 | 3 | 52 |
| 6 | Bertrand Baguette Koudai Tsukakoshi | No. 17 Astemo REAL Racing | 5 | 1 | 14 | 7 | 3 | 8 | 4 | Ret | 52 |
| 7 | Ryo Hirakawa | No. 37 TGR Team KeePer TOM'S | 3 | 3 | 7 | 10 | 11 | 9 | 10 | 2 | 46 |
| 8 | Kazuki Hiramine Nobuharu Matsushita | No. 12 Team Impul | 10 | 9 | 11 | 6 | 1 | 7 | 3 | 9 | 45 |
| 9 | Tsugio Matsuda Ronnie Quintarelli | No. 23 NISMO | Ret | Ret | 9 | 1 | 7 | 3 | 15 | 7 | 41 |
| 10 | Kohei Hirate Katsumasa Chiyo | No. 3 NDDP Racing with B-Max | 9 | 5 | 6 | 2 | Ret | 4 | 14 | 8 | 39 |
| 11 | Yuji Kunimoto Ritomo Miyata | No. 19 TGR Team WedsSport Bandoh | 12 | 7 | 2 | 13 | Ret | 13 | 2 | 13 | 36 |
| 12 | Hiroaki Ishiura Yuji Tachikawa | No. 38 TGR Team ZENT Cerumo | 6 | Ret | 8 | 8 | Ret | 2 | 9 | 5 | 34 |
| 13 | Heikki Kovalainen Yuichi Nakayama | No. 39 TGR Team SARD | 4 | 6 | 10 | 14 | 5 | 5 | 11 | 4 | 34 |
| 14 | Sena Sakaguchi | No. 37 TGR Team KeePer TOM'S | 3 | 3 | 7 | 10 | 11 | | | | 28 |
| 15 | Mitsunori Takaboshi Daiki Sasaki | No. 24 Kondo Racing | 14 | 12 | 12 | 3 | 6 | 14 | 7 | 11 | 20 |
| 16 | Ukyo Sasahara Toshiki Oyu | No. 16 Team Red Bull Mugen | 11 | 11 | 4 | 9 | 9 | Ret | 5 | 10 | 20 |
| 17 | Sacha Fenestraz | No. 37 TGR Team KeePer TOM'S | | | | | | 9 | 10 | 2 | 18 |
| 18 | Takuya Izawa Hiroki Otsu | No. 64 Modulo Nakajima Racing | 13 | 10 | Ret | Ret | 8 | 12 | 13 | 12 | 5 |
| 19 | Hideki Mutoh | No. 1 Team Kunimitsu | 8 | 4 | | | | | | | 3 |
| Rank | Driver | Team | OKA | FUJ | MOT | SUZ | SUG | AUT | MOT | FUJ | Points |
| Colour | Result |
| Gold | Winner |
| Silver | Second place |
| Bronze | Third place |
| Green | Points finish |
| Blue | Non-points finish |
| Blue | Non-classified finish (NC) |
| Purple | Retired (Ret) |
| Red | Did not qualify (DNQ) |
| Red | Did not pre-qualify (DNPQ) |
| Black | Disqualified (DSQ) |
| White | Did not start (DNS) |
| White | Withdrew (WD) |
| White | Race cancelled (C) |
| Blank | Did not practice (DNP) |
| Blank | Did not arrive (DNA) |
| Blank | Excluded (EX) |

#### GT300

Driver Ranking GT300 2021 Series :
| Rank | Driver | Team | OKA | FUJ | MOT | SUZ | SUG | AUT | MOT | FUJ | Points |
| 1 | Takuto Iguchi Hideki Yamauchi | No. 61 R&D Sport | 15 | 2 | 11 | 10 | 1 | 3 | 6 | 3 | 67 |
| 2 | Kiyoto Fujinami Joao Paulo de Oliveira | No. 56 Kondo Racing | 1 | 7 | 26 | 8 | 3 | 11 | 3 | 5 | 55 |
| 3 | Hiroki Yoshimoto Shunsuke Kohno | No. 60 LM Corsa | 8 | 1 | 12 | 14 | 5 | 19 | 11 | 1 | 49 |
| 4 | Shinichi Takagi Ren Sato | No. 55 ARTA | 26 | 3 | 23 | 7 | 2 | 20 | 2 | 24 | 45 |
| 5 | Atsushi Miyake Yuui Tsutsumi | No. 244 Max Racing | 5 | 11 | 4 | 1 | 9 | 17 | 7 | 7 | 44 |
| 6 | Naoya Gamou Togo Suganami | No. 65 K2 R&D LEON Racing | 2 | 4 | 9 | 15 | 14 | 8 | Ret | 2 | 43 |
| 7 | Katsuyuki Hiranaka Hironobu Yasuda | No. 11 GAINER | 4 | 16 | 2 | 26 | 10 | 5 | 8 | 8 | 38 |
| 8 | Takashi Kogure Yuya Motojima | No. 88 JLOC | 9 | 6 | 24 | 2 | 7 | 12 | 4 | 23 | 34 |
| 9 | Hiroki Yoshida | No. 52 Saitama Toyopet GreenBrave | 3 | 27 | 3 | 18 | 21 | 3 | 9 | 9 | 34 |
| 9 | Kohta Kawaai | No. 52 Saitama Toyopet GreenBrave | 3 | 27 | 3 | | 21 | 3 | 9 | 9 | 34 |
| 10 | Nobuteru Taniguchi Tatsuya Kataoka | No. 4 Goodsmile Racing & Team UKYO | 14 | 8 | 5 | 3 | 23 | 6 | Ret | 4 | 33 |
| 11 | Hiroki Katoh Ryohei Sakaguchi | No. 2 muta Racing INGING | Ret | 10 | 1 | 9 | 16 | 18 | 24 | 12 | 23 |
| 12 | Morio Nitta | No. 96 K-tunes Racing | 6 | 14 | 13 | 17 | 8 | 2 | 14 | 19 | 23 |
| 13 | Koki Saga Yuhki Nakayama | No. 31 apr | 19 | 28 | 18 | 24 | 13 | 1 | 22 | 14 | 21 |
| 14 | Takamitsu Matsui Kimiya Sato | No. 25 Hoppy Team Tsuchiya | 7 | 13 | 6 | 23 | 19 | 10 | 5 | 6 | 21 |
| 15 | Shintaro Kawabata Takuro Shinohara | No. 21 Audi Team Hitotsuyama | 13 | 17 | 16 | 21 | 25 | 15 | 1 | 17 | 20 |
| 16 | Sena Sakaguchi | No. 96 K-tunes Racing | | | | | | 2 | 14 | 19 | 15 |
| 17 | Kei Cozzolino | No. 9 Pacific - Car Guy Racing | 23 | 25 | 6 | 4 | 15 | 9 | 19 | 13 | 14 |
| 18 | Kazuki Hoshino Keishi Ishikawa | No. 10 GAINER | 10 | 5 | 14 | 11 | 26 | 7 | 10 | 10 | 13 |
| 19 | Naoki Yokomizo | No. 9 Pacific - Car Guy Racing | | | 6 | 4 | | | 19 | | 12 |
| 20 | Kosuke Matsuura Natsu Sakaguchi | No. 87 JLOC | 21 | 15 | Ret | 16 | 4 | 25 | Ret | 15 | 8 |
| 21 | Hiroaki Nagai Manabu Orido | No. 30 apr | Ret | 18 | 8 | 6 | 20 | 23 | 16 | 16 | 8 |
| 22 | Yuya Hiraki Reiji Hiraki | No. 5 Team Mach | 25 | 12 | 27 | 5 | 22 | 21 | 18 | 25 | 6 |
| 23 | Ryo Michigami Shogo Mitsuyama | No. 34 Yogibo Drago Corse | 16 | 19 | 17 | 13 | 6 | 22 | 12 | 11 | 5 |
| 24 | Hibiki Taira | No. 96 K-tunes Racing | 6 | 14 | 13 | | | | | | 5 |
| 25 | Takashi Kobayashi Teppei Natori | No. 18 Team UpGarage | 11 | 9 | 10 | DNS | 12 | 16 | Ret | Ret | 4 |
| 26 | Kazuto Kotaka | No. 2 muta Racing INGING No. 96 K-tunes Racing | | 10 | | 17 | 8 | | | | 3 |
| 27 | Takeshi Kimura | No. 9 Pacific - Car Guy Racing | 23 | 25 | | | 15 | 9 | | 13 | 2 |
| – | Seiji Ara Tomohide Yamaguchi | No. 7 BMW Team Studie × CSL | 17 | 20 | 25 | 25 | 11 | 13 | 15 | Ret | 0 |
| – | Satoshi Motoyama Yoshiaki Katayama | No. 6 Team LeMans with Motoyama Racing | 22 | 23 | 19 | 12 | 18 | 24 | 20 | 18 | 0 |
| – | Yuki Tanaka | No. 48 NILZZ Racing | 12 | 26 | 20 | 27 | 27 | Ret | 23 | 21 | 0 |
| – | Ryuichiro Tomita | No. 48 NILZZ Racing | 12 | | | 27 | | | | | 0 |
| – | Takayuki Aoki | No. 360 Tomei Sports | Ret | 24 | 15 | 22 | DSQ | 26 | 13 | 22 | 0 |
| – | Takuya Otaki | No. 360 Tomei Sports | | | | | | | 13 | | 0 |
| – | Masaki Kano Masataka Yanagida | No. 50 Arnage Racing | 18 | 21 | 22 | 19 | 24 | 14 | 21 | DNS | 0 |
| – | Yudai Uchida | No. 360 Tomei Sports No. 48 NILZZ Racing | Ret | 24 | 15 | 22 | DSQ | Ret | | | 0 |
| – | Sean Walkinshaw Giuliano Alesi | No. 35 arto Team Thailand | 24 | 22 | Ret | 20 | 17 | Ret | 17 | 20 | 0 |
| – | Yuta Kamimura | No. 30 apr | | 18 | | | | | | | 0 |
| – | Taku Bamba | No. 52 Saitama Toyopet GreenBrave | | | | 18 | | | | | 0 |
| – | Taiyou Iida | No. 48 NILZZ Racing | | 26 | | 20 | 27 | | 23 | 21 | 0 |
| – | Hisashi Wada Masaki Jyonai | No. 22 R'Qs Motor Sports | 20 | Ret | 21 | 28 | | Ret | | | 0 |
| – | Atsushi Tanaka | No. 360 Tomei Sports | | 24 | | | | 26 | | 22 | 0 |
| – | Ryosei Yamashita | No. 22 R'Qs Motor Sports | | Ret | | | | | | | 0 |
| Rank | Driver | Team | OKA | FUJ | MOT | SUZ | SUG | AUT | MOT | FUJ | Points |