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 Driver Class Rounds TCS Racing Team 2 Keiji Nakao 2–4 Field Motorsports 3 Sergeyevich Sato 2–6 DayDream Racing 4 Yuichi Sasaki 1, 3 Honda Formula Dream Project 5 Syun Koide All 6 Iori Kimura All 7 Kakunoshin Ohta All Rn-sports 11 "Hirobon" All 99 Yoshitsugu Kondo All KRac Motorsports 13 Daiki Fujiwara All Zap Speed 14 Motohiko Isozaki 3 Hikaru Abe 5 43 "Dragon" All 86 Hachiro Osaka All Media Do Kageyama Racing 15 Wataru Yoshimura 1, 3–6 16 Haruyuki Takahashi 1, 3 Takuya Otaki 2, 4–6 Akiland Racing 18 Makoto Hotta 1–2, 6 Hiromitsu Fujii 3 22 Reijiro Yamazaki 6 71 Masayoshi Oyama All 96 Makio Saito All RSS 20 Kotaro Shimbara 3–6 N-SPEED 23 "Yugo" 1–2, 4–6 Tsuyoshi Usui 24 Tsuyoshi Usui 2 B-Max Engineering 27 "Syuji" 5–6 44 4 Nobuhiro Imada 2–3, 5 Saccess Racing 29 Yasushi Ide 1 39 Gento Miyashita 1, 3–6 40 Seiya Motojima All ATEAM Buzz Motorsport 31 Teppei Tsuruta All 32 Max Salo All 33 Katsunori Keihara 1–2, 4–6 TGR-DC Racing School 35 Seita Nonaka All 36 Rin Arakawa All 37 Jiei Okuzumi All 38 Eijiro Shimizu All HELM Motorsports 62 Ryosuke Matsuzawa All 63 Yutaka Toriba 2–6 leprix sport 70 Isao Nakashima 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 98 Daiki Okamoto 1–4 "Ikari" 6 Sources: Icon Class 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 Circuit Date Pole position Fastest lap Winning driver Winning team 1 R1 Fuji Speedway, Oyama 3 May Iori Kimura Rin Arakawa Iori Kimura Honda Formula Dream Project "Dragon" R2 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" R7 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 R4 Seita Nonaka Seita Nonaka Seita Nonaka TGR-DC Racing School Yutaka Toriba R5 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 R9 Iori Kimura Kotaro Shimbara Iori Kimura Honda Formula Dream Project Yutaka Toriba R10 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 R12 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 R14 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 SUZ MOT1 SUG MOT2 FUJ2 PtsR1R2R3R4R5R6R7R8R9R10R11R12R13R14 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 29 023 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 26 029 "Ikari" 21 170 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 23 039 Reijiro Yamazaki 23 240 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 DriverR1R2R3R4R5R6R7R8R9R10R11R12R13R14 Pts FUJ1 SUZ MOT1 SUG MOT2 FUJ2Bold – PoleItalics – Fastest Lap† — Did not finish but classified
Independent Cup Pos Driver FUJ1 SUZ MOT1 SUG MOT2 FUJ2 PtsR1R2R3R4R5R6R7R8R9R10R11R12R13R14 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 3213 "Ikari" 21 1730 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 DriverR1R2R3R4R5R6R7R8R9R10R11R12R13R14 Pts FUJ1 SUZ MOT1 SUG MOT2 FUJ2
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 4Saccess Racing 59 5Skill 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
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