# 2021 F4 Japanese Championship

The 2021 F4 Japanese Championship season was the seventh season of the F4 Japanese Championship. It held a total of 14 races over four double-header rounds and two triple-header rounds.

## Teams and drivers

All teams were Japanese-registered.
| Team | No. | Driver | Class | Rounds |
| TCS Racing Team | 2 | Keiji Nakao | I | 2–4 |
| Field Motorsports | 3 | Sergeyevich Sato | I | 2–6 |
| DayDream Racing | 4 | Yuichi Sasaki | I | 1, 3 |
| Honda Formula Dream Project | 5 | Syun Koide | | All |
| Honda Formula Dream Project | 6 | Iori Kimura | | All |
| Honda Formula Dream Project | 7 | Kakunoshin Ohta | | All |
| Rn-sports | 11 | "Hirobon" | I | All |
| Rn-sports | 99 | Yoshitsugu Kondo | I | All |
| KRac Motorsports | 13 | Daiki Fujiwara | | All |
| Zap Speed | 14 | Motohiko Isozaki | I | 3 |
| Zap Speed | 14 | Hikaru Abe | | 5 |
| Zap Speed | 43 | "Dragon" | I | All |
| Zap Speed | 86 | Hachiro Osaka | I | All |
| Media Do Kageyama Racing | 15 | Wataru Yoshimura | | 1, 3–6 |
| Media Do Kageyama Racing | 16 | Haruyuki Takahashi | | 1, 3 |
| Media Do Kageyama Racing | 16 | Takuya Otaki | | 2, 4–6 |
| Akiland Racing | 18 | Makoto Hotta | I | 1–2, 6 |
| Akiland Racing | 18 | Hiromitsu Fujii | I | 3 |
| Akiland Racing | 22 | Reijiro Yamazaki | | 6 |
| Akiland Racing | 71 | Masayoshi Oyama | I | All |
| Akiland Racing | 96 | Makio Saito | I | All |
| RSS | 20 | Kotaro Shimbara | | 3–6 |
| N-SPEED | 23 | "Yugo" | I | 1–2, 4–6 |
| Tsuyoshi Usui | 24 | Tsuyoshi Usui | I | 2 |
| B-Max Engineering | 27 | "Syuji" | I | 5–6 |
| B-Max Engineering | 44 | "Syuji" | I | 4 |
| B-Max Engineering | 44 | Nobuhiro Imada | I | 2–3, 5 |
| Saccess Racing | 29 | Yasushi Ide | I | 1 |
| Saccess Racing | 39 | Gento Miyashita | | 1, 3–6 |
| Saccess Racing | 40 | Seiya Motojima | | All |
| ATEAM Buzz Motorsport | 31 | Teppei Tsuruta | | All |
| ATEAM Buzz Motorsport | 32 | Max Salo | | All |
| ATEAM Buzz Motorsport | 33 | Katsunori Keihara | I | 1–2, 4–6 |
| TGR-DC Racing School | 35 | Seita Nonaka | | All |
| TGR-DC Racing School | 36 | Rin Arakawa | | All |
| TGR-DC Racing School | 37 | Jiei Okuzumi | | All |
| TGR-DC Racing School | 38 | Eijiro Shimizu | | All |
| HELM Motorsports | 62 | Ryosuke Matsuzawa | | All |
| HELM Motorsports | 63 | Yutaka Toriba | I | 2–6 |
| leprix sport | 70 | Isao Nakashima | I | 5 |
| C.S.I-Reon Kids Racing | 73 | Shunsuke Hanawa | | All |
| Skill Speed | 77 | Sota Ogawa | | All |
| OTG Motor Sports | 80 | Reimei Ito | | All |
| Bionic Jack Racing | 97 | Yugo Iwasawa | | All |
| Bionic Jack Racing | 98 | Daiki Okamoto | | 1–4 |
| Bionic Jack Racing | 98 | "Ikari" | I | 6 |
| Sources: |||||
| Icon | Class |
| I | Independent Cup |

## Race calendar and results

All rounds were held in Japan and support the Super GT events. The revised calendar was published on 10 February 2021. The second round of the championship at Suzuka Circuit was postponed from 29–30 May to 21–22 August due to COVID-19 pandemic. The nomenclature was kept, despite the round at Twin Ring Motegi being held in the meantime.
| Round | Round | Circuit | Date | Pole position | Fastest lap | Winning driver | Winning team | Independent Cup winner |
| 1 | R1 | Fuji Speedway, Oyama | 3 May | Iori Kimura | Rin Arakawa | Iori Kimura | Honda Formula Dream Project | "Dragon" |
| 1 | R2 | Fuji Speedway, Oyama | 4 May | Syun Koide | Syun Koide | Seita Nonaka | TGR-DC Racing School | "Hirobon" |
| 3 | R6 | Suzuka Circuit, Suzuka | 21 August | Iori Kimura | Eijiro Shimizu | Iori Kimura | Honda Formula Dream Project | "Hirobon" |
| 3 | R7 | Suzuka Circuit, Suzuka | 22 August | Iori Kimura | Jiei Okuzumi | Rin Arakawa | TGR-DC Racing School | Sergeyevich Sato |
| 2 | R3 | Twin Ring Motegi, Motegi | 17 July | Reimei Ito | Seita Nonaka | Seita Nonaka | TGR-DC Racing School | Yutaka Toriba |
| 2 | R4 | Twin Ring Motegi, Motegi | 17 July | Seita Nonaka | Seita Nonaka | Seita Nonaka | TGR-DC Racing School | Yutaka Toriba |
| 2 | R5 | Twin Ring Motegi, Motegi | 18 July | | Seita Nonaka | Seita Nonaka | TGR-DC Racing School | "Hirobon" |
| 4 | R8 | Sportsland Sugo, Murata | 11 September | Syun Koide | Iori Kimura | Syun Koide | Honda Formula Dream Project | Yutaka Toriba |
| 4 | R9 | Sportsland Sugo, Murata | 11 September | Iori Kimura | Kotaro Shimbara | Iori Kimura | Honda Formula Dream Project | Yutaka Toriba |
| 4 | R10 | Sportsland Sugo, Murata | 12 September | | Seita Nonaka | Reimei Ito | OTG Motor Sports | "Dragon" |
| 5 | R11 | Twin Ring Motegi, Motegi | 6 November | Rin Arakawa | Rin Arakawa | Iori Kimura | Honda Formula Dream Project | Yutaka Toriba |
| 5 | R12 | Twin Ring Motegi, Motegi | 7 November | Rin Arakawa | Rin Arakawa | Rin Arakawa | TGR-DC Racing School | Yutaka Toriba |
| 6 | R13 | Fuji Speedway, Oyama | 27 November | Reimei Ito | Seita Nonaka | Seita Nonaka | TGR-DC Racing School | Yutaka Toriba |
| 6 | R14 | Fuji Speedway, Oyama | 28 November | Reimei Ito | Kakunoshin Ohta | Seita Nonaka | TGR-DC Racing School | "Hirobon" |

## Championship standings

Points were awarded as follows:
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th |
| Points | 25 | 18 | 15 | 12 | 10 | 8 | 6 | 4 | 2 | 1 |

### Drivers' standings

| Pos | Driver | FUJ1 | FUJ1 | SUZ | SUZ | MOT1 | MOT1 | MOT1 | SUG | SUG | SUG | MOT2 | MOT2 | FUJ2 | FUJ2 | Pts |
| Pos | Driver | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | R10 | R11 | R12 | R13 | R14 | Pts |
| 1 | Seita Nonaka | 3 | 1 | 28 | 7 | 1 | 1 | 1 | 5 | 7 | 2 | 4 | Ret | 1 | 1 | 217 |
| 2 | Rin Arakawa | 6 | 2 | 5 | 1 | 4 | 3 | 3 | 4 | 5 | 4 | 2 | 1 | 3 | 2 | 213 |
| 3 | Iori Kimura | 1 | 25 | 1 | 5 | 5 | 2 | 7 | 2 | 1 | 26 | 1 | 9 | 4 | 3 | 191 |
| 4 | Reimei Ito | 8 | 6 | 7 | 4 | 2 | 4 | 6 | 3 | 2 | 1 | 9 | 7 | 2 | 6 | 160 |
| 5 | Kakunoshin Ohta | 4 | 31 | 2 | 2 | 3 | 5 | 2 | 8 | 9 | 6 | 3 | 2 | Ret | 4 | 150 |
| 6 | Syun Koide | 2 | 7 | 3 | Ret | 7 | 6 | Ret | 1 | 3 | 3 | Ret | 8 | 6 | 8 | 124 |
| 7 | Jiei Okuzumi | 7 | 5 | 6 | 6 | 8 | 9 | 5 | 9 | 8 | 12 | 5 | 3 | 5 | 5 | 99 |
| 8 | Eijiro Shimizu | 5 | 3 | 4 | 19 | 6 | 10 | 4 | 10 | 10 | 10 | Ret | 10 | 7 | 26 | 68 |
| 9 | Seiya Motojima | 10 | 8 | 22 | 3 | 12 | 13 | 10 | 7 | 6 | 5 | 7 | 6 | 12 | 15 | 59 |
| 10 | Sota Ogawa | 9 | 4 | 9 | 12 | 9 | 8 | 8 | 12 | 13 | 11 | 6 | 4 | 13 | 7 | 52 |
| 11 | Ryosuke Matsuzawa | 12 | 9 | 11 | 8 | 11 | 11 | 12 | 6 | 4 | 8 | 27† | 12 | 8 | 11 | 34 |
| 12 | Yugo Iwasawa | 11 | 12 | 8 | 9 | 10 | 7 | 9 | Ret | 12 | 7 | Ret | 5 | 9 | 10 | 34 |
| 13 | Takuya Otaki | | | 14 | 10 | | | | 11 | 30† | 9 | 8 | 13 | Ret | 21 | 7 |
| 14 | Kotaro Shimbara | | | | | 13 | Ret | 11 | DNS | 11 | 24 | 10 | 14 | DSQ | 9 | 3 |
| 15 | Daiki Fujiwara | 17 | 10 | 12 | 11 | 14 | 12 | 13 | 13 | 17 | 13 | 12 | 17 | 11 | 12 | 1 |
| 16 | Gento Miyashita | 16 | 15 | | | 16 | 17 | 14 | 14 | 16 | 15 | 11 | 11 | 10 | 13 | 1 |
| 17 | "Hirobon" | 21 | 16 | 10 | 15 | 20 | 19 | 20 | 21 | 20 | 20 | 22 | 23 | 30 | 16 | 1 |
| 18 | Teppei Tsuruta | 15 | 11 | 30 | DSQ | 18 | 24 | 18 | 15 | 15 | 14 | 16 | 18 | 17 | 14 | 0 |
| 19 | Daiki Okamoto | 14 | 13 | 13 | 13 | 15 | 16 | 16 | 17 | 14 | 16 | | | | | 0 |
| 20 | Shunsuke Hanawa | 19 | 14 | | | 31 | 14 | 17 | 16 | 25 | 17 | 13 | 22 | 18 | 20 | 0 |
| 21 | Haruyuki Takahashi | 13 | 19 | | | 17 | Ret | 15 | | | | | | | | 0 |
| 22 | Yutaka Toriba | | | Ret | 18 | 19 | 15 | 21 | 19 | 18 | 19 | 14 | 16 | 14 | 29 | 0 |
| 23 | Sergeyevich Sato | | | 20 | 14 | 23 | 20 | 25 | 23 | 24 | 25 | 15 | 19 | Ret | 18 | 0 |
| 24 | Wataru Yoshimura | 22 | 18 | | | 21 | 21 | 22 | 18 | 19 | Ret | Ret | 15 | 15 | Ret | 0 |
| 25 | Makio Saito | Ret | 21 | 15 | 25 | 22 | 23 | 24 | Ret | 22 | 22 | 20 | 21 | 20 | 19 | 0 |
| 26 | "Dragon" | 20 | 17 | 18 | 17 | Ret | Ret | DNS | 20 | 21 | 18 | 17 | 20 | 16 | Ret | 0 |
| 27 | Max Salo | 18 | 20 | 16 | 21 | 27 | 18 | 19 | 24 | Ret | 21 | 18 | 24 | 19 | 28 | 0 |
| 28 | Nobuhiro Imada | | | 23 | 16 | Ret | 28 | 26 | | | | 19 | 26 | | | 0 |
| 29 | "Ikari" | | | | | | | | | | | | | 21 | 17 | 0 |
| 30 | Tsuyoshi Usui | | | 17 | Ret | | | | | | | | | | | 0 |
| 31 | Masayoshi Oyama | 27 | 27 | 19 | 24 | 28 | 29 | 31 | 27 | 31† | 29 | 24 | 28 | 26 | Ret | 0 |
| 32 | Keiji Nakao | | | 21 | 20 | Ret | 22 | 23 | 22 | 23 | 23 | | | | | 0 |
| 33 | Hikaru Abe | | | | | | | | | | | 21 | 25 | | | 0 |
| 34 | Hachiro Osaka | 25 | 30† | 29 | 22 | 29 | 27 | 29 | 26 | 32† | 27 | Ret | 29 | 22 | Ret | 0 |
| 35 | Makoto Hotta | 26 | 24 | 26 | 23 | | | | | | | | | 25 | 22 | 0 |
| 36 | Yuichi Sasaki | Ret | 22 | | | 25 | 25 | 28 | | | | | | | | 0 |
| 37 | Yoshitsugu Kondo | 23 | 26 | 27 | Ret | 24 | 26 | 27 | 25 | 29 | 28 | 23 | 27 | 24 | 23 | 0 |
| 38 | Yasushi Ide | 24 | 23 | | | | | | | | | | | | | 0 |
| 39 | Reijiro Yamazaki | | | | | | | | | | | | | 23 | 24 | 0 |
| 40 | "Yugo" | 28 | 28 | 24 | Ret | | | | 29 | 28 | 31 | 26 | 31 | 29 | 27 | 0 |
| 41 | Katsunori Keihara | 29 | 29 | 25 | Ret | | | | 30 | 27 | Ret | 25 | 30 | 28 | 30 | 0 |
| 42 | "Syuji" | | | | | | | | 28 | 26 | 30 | Ret | Ret | 27 | 25 | 0 |
| 43 | Motohiko Isozaki | | | | | 26 | 31 | 30 | | | | | | | | 0 |
| 44 | Hiromitsu Fujii | | | | | 30 | 30 | 32 | | | | | | | | 0 |
| – | Isao Nakashima | | | | | | | | | | | Ret | Ret | | | – |
| Pos | Driver | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | R10 | R11 | R12 | R13 | R14 | Pts |
| Pos | Driver | FUJ1 | FUJ1 | SUZ | SUZ | MOT1 | MOT1 | MOT1 | SUG | SUG | SUG | MOT2 | MOT2 | FUJ2 | FUJ2 | | Pts |
| 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) |

### Independent Cup

| Pos | Driver | FUJ1 | FUJ1 | SUZ | SUZ | MOT1 | MOT1 | MOT1 | SUG | SUG | SUG | MOT2 | MOT2 | FUJ2 | FUJ2 | Pts |
| Pos | Driver | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | R10 | R11 | R12 | R13 | R14 | Pts |
| 1 | "Hirobon" | 21 | 16 | 10 | 15 | 20 | 19 | 20 | 21 | 20 | 20 | 22 | 23 | 30 | 16 | 238 |
| 2 | Yutaka Toriba | | | Ret | 18 | 19 | 15 | 21 | 19 | 18 | 19 | 14 | 16 | 14 | 29 | 223 |
| 3 | "Dragon" | 20 | 17 | 18 | 17 | Ret | Ret | DNS | 20 | 21 | 18 | 17 | 20 | 16 | Ret | 173 |
| 4 | Sergeyevich Sato | | | 20 | 14 | 23 | 20 | 25 | 23 | 24 | 25 | 15 | 19 | Ret | 18 | 147 |
| 5 | Makio Saito | Ret | 21 | 15 | 25 | 22 | 23 | 24 | Ret | 22 | 22 | 20 | 21 | 20 | 19 | 144 |
| 6 | Yoshitsugu Kondo | 23 | 26 | 27 | Ret | 24 | 26 | 27 | 25 | 29 | 28 | 23 | 27 | 24 | 23 | 84 |
| 7 | Keiji Nakao | | | 21 | 20 | Ret | 22 | 23 | 22 | 23 | 23 | | | | | 73 |
| 8 | Nobuhiro Imada | | | 23 | 16 | Ret | 28 | 26 | | | | 19 | 26 | | | 49 |
| 9 | Hachiro Osaka | 25 | 30† | 29 | 22 | 29 | 27 | 29 | 26 | 32† | 27 | Ret | 29 | 22 | Ret | 48 |
| 10 | Masayoshi Oyama | 27 | 27 | 19 | 24 | 28 | 29 | 31 | 27 | 31† | 29 | 24 | 28 | 26 | Ret | 45 |
| 11 | Makoto Hotta | 26 | 24 | 26 | 23 | | | | | | | | | 25 | 22 | 36 |
| 12 | Yuichi Sasaki | Ret | 22 | | | 25 | 25 | 28 | | | | | | | | 32 |
| 13 | "Ikari" | | | | | | | | | | | | | 21 | 17 | 30 |
| 14 | Yasushi Ide | 24 | 23 | | | | | | | | | | | | | 22 |
| 15 | "Syuji" | | | | | | | | 28 | 26 | 30 | Ret | Ret | 27 | 25 | 17 |
| 16 | "Yugo" | 28 | 28 | 24 | Ret | | | | 29 | 28 | 31 | 26 | 31 | 29 | 27 | 16 |
| 17 | Tsuyoshi Usui | | | 17 | Ret | | | | | | | | | | | 15 |
| 18 | Katsunori Keihara | 29 | 29 | 25 | Ret | | | | 30 | 27 | Ret | 25 | 30 | 28 | 30 | 13 |
| 19 | Motohiko Isozaki | | | | | 26 | 31 | 30 | | | | | | | | 7 |
| 20 | Hiromitsu Fujii | | | | | 30 | 30 | 32 | | | | | | | | 1 |
| – | Isao Nakashima | | | | | | | | | | | Ret | Ret | | | – |
| Pos | Driver | R1 | R2 | R3 | R4 | R5 | R6 | R7 | R8 | R9 | R10 | R11 | R12 | R13 | R14 | Pts |
| Pos | Driver | FUJ1 | FUJ1 | SUZ | SUZ | MOT1 | MOT1 | MOT1 | SUG | SUG | SUG | MOT2 | MOT2 | FUJ2 | FUJ2 | | Pts |

### Teams' standings

Only the best finisher scored points for their team.
| Pos | Team | Points |
| 1 | TGR-DC Racing School | 285 |
| 2 | Honda Formula Dream Project | 260 |
| 3 | OTG Motor Sports | 160 |
| 4 | Saccess Racing | 59 |
| 5 | Skill Speed | 52 |
| 6 | HELM Motorsports | 34 |
| 7 | Bionic Jack Racing | 34 |
| 8 | Media Do Kageyama Racing | 7 |
| 9 | RSS | 3 |
| 10 | KRac Motorsports | 1 |
| 11 | Rn-sports | 1 |