The2025 F4 Japanese Championship season was the eleventh season of theF4 Japanese Championship.

This was the second season for the second-generation MCSC-24 chassis constructed byToray Carbon Magic, andTOM'S TMA43 engine which produces 180 horsepower.^[1]

All teams competed with an identical Toray Carbon Magic MCSC-24 chassis and TOM'S 2-litre naturally aspirated engine.^[1]

Team	No.	Driver	Rounds
Champion Class
Team 5ZIGEN	3	Sena Yamamoto[2]	1–3, 6
Buzz Racing	7	Aoto Nagahara[3]	3, 5
TGM Grand Prix	8	Leon Ochiai[4]	All
	53	Shota Sakai[4]	All
Zap Speed	14	Masaki Murata[2]	All
HYDRANGEA Kageyama Racing	15	Ryusho Nakazato[2]	2–6
	16	Ryo Shirasaki[2]	All
	17	Itsuki Sato[2]	All
Akiland Racing	19	Keito Matsui[2]	All
TGR-DC Racing School	28	Kiyoshi Umegaki[5]	All
	29	Tokiya Suzuki[5]	All
	35	Megumu Suzuki[5]	All
	36	Takahiro Kikuchi[5]	All
	37	Masana Muto[5]	All
	38	Yuzuki Miura[5]	All
Drago Corse	33	Yuta Suzuki[2]	All
	34	Fuki Tanaka[2]	All
B-Max Racing Team[a] HFDPwith B-Max Racing Team[a]	43	Tosei Moriyama[6]	All
	50	Kotaro Shimbara[7]	All
	51	Syo Momose[7]	All
	52	Ayato Iwasaki[8]	All
Ponos Racing	45	Ryota Horachi[9]	All
	54	Ryuma Sako[9]	All
Fujita Pharmacy Racing	46	Shouma Arimura[2]	All
Ragno Motor Sport	48	Lin Chenghua[2]	1–2
		Kaoru Yoshida[10]	4
OTG Motor Sports	60	Kenta Kumagai[11]	All
	80	Miki Onaga[11]	All
HELM Motorsports	62	Haruto Nakai[12]	All
	63	Fuji Kishi[12]	All
Skill Speed	77	Yasumasa Kano[2]	1
Dr Dry Racing Team	87	Rio Shimono[2]	1–3, 5–6
		Rikuto Toyoshima[10]	4
Bionic Jack Racing	97	Ai Miura[2]	All
Independent Class
Day Dream Racing	4	Yuichi Sasaki[2]	All
Team 5ZIGEN	5	Motohiro Kotani[2]	1–3, 6
Buzz Racing	6	"Ken Alex"[2]	All
	7	Hitoshi Sakai[2]	1
Rn-sports	10	Isao Nakashima[2]	All
	11	Masayuki Ueda[2]	All
	74	Kentaro Kojima[2]	All
Eagle Racing	21	Tadakazu Kojima[2]	All
	40	Shoichiro Akamatsu[2]	All
N-Speed	23	"Yugo"[2]	All
B-Max Racing Team	30	"Dragon"[8]	All
	44	Nobuhiro Imada[8]	All
	88	Kazutaka Miura[8]	2–4
		Yasuhiro Shimizu	5–6
Field Motorsport	55	"Kentaro"[2]	All
HELM Motorsports	61	William Sakai[12]	All
	64	Go Shimizu[12]	1–3, 6
Akiland Racing	71	Masayoshi Oyama[2]	All
	96	Makio Saito[2]	All
Dr Dry Racing Team	86	Hachiro Osaka[2]	All
Bionic Jack Racing	98	"Ikari"[2]	All

All rounds are held inJapan and support theSuper GT events in Japan, except for Okayama.^[13]

Round		Circuit	Date	Pole position	Fastest lap	Winning driver	Winning team	Independent Class winner
1	R1	Fuji Speedway,Oyama	3 May	Ryo Shirasaki	Itsuki Sato	Tokiya Suzuki	TGR-DC Racing School	"Kentaro"
	R2		4 May	Ryo Shirasaki	Ryo Shirasaki	Ryo Shirasaki	HYDRANGEA Kageyama Racing	"Dragon"
	R3				Ryo Shirasaki	Itsuki Sato	HYDRANGEA Kageyama Racing	"Kentaro"
2	R4		2 August	Itsuki Sato	Tokiya Suzuki	Itsuki Sato	HYDRANGEA Kageyama Racing	"Dragon"
	R5		3 August	Itsuki Sato	Itsuki Sato	Itsuki Sato	HYDRANGEA Kageyama Racing	"Dragon"
3	R6	Suzuka Circuit,Suzuka	23 August	Kotaro Shimbara	Tosei Moriyama	Itsuki Sato	HYDRANGEA Kageyama Racing	"Dragon"
	R7		24 August	Kotaro Shimbara	Itsuki Sato	Kotaro Shimbara	HFDPwith B-Max Racing Team	Nobuhiro Imada
4	R8	Sportsland Sugo,Murata	20 September	Tokiya Suzuki	Itsuki Sato	Tokiya Suzuki	TGR-DC Racing School	"Kentaro"
	R9			Tokiya Suzuki	Itsuki Sato	Tokiya Suzuki	TGR-DC Racing School	"Kentaro"
	R10		21 September		Itsuki Sato	Itsuki Sato	HYDRANGEA Kageyama Racing	Nobuhiro Imada
5	R11	Autopolis,Hita	18 October	Tokiya Suzuki	Tokiya Suzuki	Tokiya Suzuki	TGR-DC Racing School	"Kentaro"
	R12		19 October	Tosei Moriyama	Ryo Shirasaki	Ryo Shirasaki	HYDRANGEA Kageyama Racing	Nobuhiro Imada
6	R13	Mobility Resort Motegi,Motegi	1 November	Kotaro Shimbara	Kotaro Shimbara	Kotaro Shimbara	HFDPwith B-Max Racing Team	Yasuhiro Shimizu
	R14		2 November	Itsuki Sato	Itsuki Sato	Ryo Shirasaki	HYDRANGEA Kageyama Racing	"Kentaro"

Points were awarded as follows:

Pos Driver FUJ1 FUJ2 SUZ SUG AUT MOT Pts R1 R2 R3 R4[b] R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 1 Tokiya Suzuki 1 3 3 26 7 3 6 1 1 2 1 4 2 4 219 2 Itsuki Sato 11 2 1 1 1 1 2 2 2 1 2 5 Ret 14 212.5 3 Ryo Shirasaki 8 1 23 3 3 7 10 4 3 3 4 1 7 1 168.5 4 Kotaro Shimbara 21 6 13 2 2 2 1 13 5 16 8 8 1 7 127 5 Ryota Horachi 5 5 24 7 4 4 4 14 12 Ret 7 6 3 5 98 6 Syo Momose 6 21 6 4 5 6 3 9 11 6 6 3 13 6 96 7 Kiyoshi Umegaki 2 10 4 25 9 25 11 6 7 4 11 11 4 2 89 8 Tosei Moriyama 3 4 2 6 6 16 14 16 13 20 5 2 9 12 88 9 Kenta Kumagai Ret Ret 17 10 13 5 5 3 9 5 10 9 12 18 50.5 10 Ryuma Sako 12 11 8 5 8 24 8 12 4 18 20 24 6 11 37 11 Megumu Suzuki 9 7 11 20 21 10 12 7 8 8 12 12 8 8 31 12 Yuzuki Miura 14 13 Ret 22 15 27 9 15 16 14 15 10 5 3 28 13 Leon Ochiai 23 14 10 11 11 26 Ret 5 6 7 19 15 Ret 9 27 14 Ayato Iwasaki 4 19 5 24 10 13 15 23 15 17 13 13 17 20 23 15 Masana Muto 15 Ret DNQ DNS 19 12 17 17 21 10 3 7 18 19 22 16 Keito Matsui 10 Ret 12 19 22 8 7 8 14 12 WD WD 15 Ret 15 17 Yuta Suzuki 16 8 7 13 14 Ret 27 11 10 13 25 22 14 13 11 18 Fuki Tanaka 7 Ret Ret 12 12 Ret 23 18 18 15 17 16 10 10 8 19 Takahiro Kikuchi Ret 15 15 17 18 9 29 10 24 24 9 14 16 26 5 20 Haruto Nakai 22 9 22 9 27 11 19 28 25 23 19 18 19 15 3 21 Fuji Kishi 24 16 18 8 26 15 26 27 26 21 22 DNS 20 21 2 22 Sena Yamamoto 20 12 9 21 16 14 18 25 25 2 23 Rikuto Toyoshima 19 17 9 2 24 Shota Sakai 18 18 14 23 23 23 13 22 24 11 16 17 23 16 0 25 Masaki Murata Ret Ret DNS 16 28 18 28 21 25 19 23 21 13 Ret 0 26 Miki Onaga 13 Ret 20 18 20 22 24 20 23 Ret 21 19 22 23 0 27 Ryusho Nakazato 14 25 19 16 24 Ret 26 Ret 23 27 Ret 0 28 Rio Shimono 17 DNS 16 DNS 24 20 21 15 27 24 24 0 29 Ai Miura 19 17 19 15 17 17 20 26 20 25 24 25 21 17 0 30 Kaoru Yoshida Ret 19 22 0 31 Shouma Arimura Ret Ret DNQ DNQ DNQ 28 25 25 22 27 Ret 20 26 22 0 32 Lin Chenghua DNQ 20 Ret DNQ DNQ 0 33 Aoto Nagahara 21 22 26 26 0 34 Yasumasa Kano DNQ DNQ 21 0 Pos Driver R1 R2 R3 R4[b] R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 Pts FUJ1 FUJ2 SUZ SUG AUT MOT

Key Colour Result Gold Winner Silver Second place Bronze Third place Green Other points position Blue Other classified position Not classified, finished (NC) Purple Not classified, retired (Ret) Red Did not qualify (DNQ) Did not pre-qualify (DNPQ) Black Disqualified (DSQ) White Did not start (DNS) Race cancelled (C) Blank Did not practice (DNP) Excluded (EX) Did not arrive (DNA) Withdrawn (WD) Did not enter (cell empty) Text formatting Meaning Bold Pole position Italics Fastest lap † — Did not finish but classified

Pos	Driver	FUJ1			FUJ2		SUZ		SUG			AUT		MOT		Pts
		R1	R2	R3	R4[b]	R5	R6	R7	R8	R9	R10	R11	R12	R13	R14
1	Nobuhiro Imada	2	4	Ret	2	2	3	1	3	5	1	2	1	2	2	226
2	"Kentaro"	1	3	1	3	Ret	5	2	1	1	Ret	1	3	5	1	225.5
3	"Dragon"	Ret	1	5	1	1	1	3	2	2	3	4	Ret	13	3	190.5
4	Masayuki Ueda	DNQ	DNQ	DNQ	6	3	2	4	5	4	5	3	4	6	15	116
5	"Ken Alex"	4	15	2	5	5	4	13	15	11	2	7	5	4	7	109
6	Isao Nakashima	3	2	3	4	8	Ret	Ret	4	3	9	8	Ret	10	11	92
7	Shoichiro Akamatsu	8	13	Ret	11	7	6	7	8	8	6	6	6	7	5	72
8	Makio Saito	5	8	4	Ret	4	8	Ret	6	6	4	11	12	14	10	71
9	William Sakai	7	6	7	8	Ret	9	9	10	9	8	Ret	8	3	4	64
10	Yasuhiro Shimizu											5	2	1	9	55
11	Go Shimizu	13	10	11	7	14	7	5						8	6	32
12	"Ikari"	11	5	8	12	15	12	16	7	7	10	12	9	Ret	Ret	29
13	Masayoshi Oyama	6	9	6	DNQ	DNQ	11	14	9	15	11	14	10	11	12	21
14	Yuichi Sasaki	12	14	10	10	10	14	11	11	13	7	10	11	9	8	15.5
15	Motohiro Kotani	Ret	7	Ret	Ret	12	15	6						12	14	14
16	Kentaro Kojima	10	12	Ret	13	11	13	8	12	10	13	9	7	Ret	13	14
17	Tadakazu Kojima	Ret	17	9	13	6	10	10	WD	WD	WD	WD	WD	WD	WD	12
18	Hachiro Osaka	9	11	13	9	13	16	Ret	14	14	12	13	13	DNQ	DNQ	3
19	Kazutaka Miura				14	9	Ret	12	13	12	14					2
20	Hitoshi Sakai	14	16	12												0
21	"Yugo"	DNQ	DNQ	DNQ	DNQ	DNQ	17	15	16	16	15	15	14	DNQ	DNQ	0
Pos	Driver	R1	R2	R3	R4[b]	R5	R6	R7	R8	R9	R10	R11	R12	R13	R14	Pts
		FUJ1			FUJ2		SUZ		SUG			AUT		MOT

Only the best finisher scored points for their team.

• Official website(in Japanese)

• Japanese F4 Championship seasons
• 2025 in Formula 4
• 2025 in Japanese motorsport

• Articles with short description
• Short description matches Wikidata
• Official website not in Wikidata
• Articles with Japanese-language sources (ja)