The 2004 Formula Nippon Championship was contested over 9 rounds, with 8 teams and 17 drivers competed. All teams had to use Lola chassis (Lola B3/51) and Mugen Honda (Mugen MF308) engines.

Team	#	Driver	Chassis	Engine	Rounds
ADiRECT Team 5ZIGEN	1	Satoshi Motoyama	Lola B3/51	Mugen MF308	All
	2	Toshihiro Kaneishi			All
Yellow Hat Kondo Racing Team	3	Ryo Michigami	Lola B3/51	Mugen MF308	All
	4	Yuji Tachikawa			1–3
Team LeMans	7	Juichi Wakisaka	Lola B3/51	Mugen MF308	All
	8	Takeshi Tsuchiya			All
Cosmo Oil Racing Team Cerumo	11	Tsugio Matsuda	Lola B3/51	Mugen MF308	All
	12	Masami Kageyama			6–9
mobilecast Team Impul	19	Benoît Tréluyer	Lola B3/51	Mugen MF308	All
	20	Yuji Ide			All
LeMans Spirit	25	Tatsuya Kataoka	Lola B3/51	Mugen MF308	All
Carrozzerria Team MOHN	27	Koji Yamanishi	Lola B3/51	Mugen MF308	4–5, 8
	28	Hideki Noda			All
PIAA Nakajima Racing	31	André Lotterer	Lola B3/51	Mugen MF308	All
	32	Takashi Kogure			All
DoCoMo Team Dandelion Racing	40	Richard Lyons	Lola B3/51	Mugen MF308	All
	41	Naoki Hattori			All

Race	Track	Date	Pole Position	Fastest Race Lap	Winning Driver	Winning Team
1	Suzuka Circuit	28 March	Yuji Ide	Richard Lyons	Takashi Kogure	PIAA Nakajima Racing
2	Sportsland SUGO	2 May	Richard Lyons	Takashi Kogure	Richard Lyons	DoCoMo Team Dandelion Racing
3	Twin Ring Motegi	6 June	Richard Lyons	Richard Lyons	André Lotterer	PIAA Nakajima Racing
4	Suzuka Circuit	4 July	Richard Lyons	Naoki Hattori	Richard Lyons	DoCoMo Team Dandelion Racing
5	Sportsland SUGO	1 August	Richard Lyons	Juichi Wakisaka	Satoshi Motoyama	ADiRECT Team 5ZIGEN
6	Mine Circuit	29 August	Benoît Tréluyer	Juichi Wakisaka	Benoît Tréluyer	mobilecast Team Impul
7	Sepang International Circuit	19 September	André Lotterer	Richard Lyons	André Lotterer	PIAA Nakajima Racing
8	Twin Ring Motegi	24 October	Juichi Wakisaka	André Lotterer	Yuji Ide	mobilecast Team Impul
9	Suzuka Circuit	7 November	Richard Lyons	Yuji Ide	Benoît Tréluyer	mobilecast Team Impul

• At race 4 a sprint race of 18 laps (104.526 km) set the grid for the main race. The sprint race winner Richard Lyons started from pole in the main race.
• At race 7 a sprint race of 20 laps (110.72 km) set grid for the main race. The sprint race winner André Lotterer started from pole in the main race. Naoki Hattori set pole position for the sprint race.

Scoring system

Rank	Name	SUZ	SGO	MOT	SUZ	SGO	MIN	MYS	MOT	SUZ	Points
1	Richard Lyons	8	1	8	1	4	8	9	2	3	33
2	André Lotterer	2	4	1	8	Ret	Ret	1	3	7	33
3	Yuji Ide	12	2	2	3	7	7	10	1	2	32
4	Benoît Tréluyer	Ret	6	4	2	10	1	7	Ret	1	30
5	Juichi Wakisaka	13	3	Ret	5	3	2	3	Ret	4	23
6	Satoshi Motoyama	5	12	5	4	1	6	Ret	5	6	21
7	Takashi Kogure	1	9	9	7	2	Ret	6	9	8	17
8	Tatsuya Kataoka	10	11	3	13	Ret	4	5	4	12	12
9	Naoki Hattori	7	7	Ret	10	6	10	2	Ret	10	7
10	Ryo Michigami	3	5	6	Ret	Ret	11	8	10	13	7
11	Tsugio Matsuda	4	NC	12	9	DSQ	12	4	6	Ret	7
12	Toshihiro Kaneishi	6	13	10	Ret	12	3	Ret	Ret	11	5
13	Takeshi Tsuchiya	11	10	7	11	8	5	Ret	Ret	5	4
14	Yuji Tachikawa	Ret	NC	Ret	6	5	9	Ret	7	9	3
15	Hideki Noda	9	8	11	Ret	11	Ret	Ret	11	14	0
16	Koji Yamanishi				12	9			8		0
17	Masami Kageyama						Ret	11	Ret	15	0

Rank	Team	Car	SUZ	SGO	MOT	SUZ	SGO	MIN	MYS	MOT	SUZ	Points
1	mobilecast Impul	19	Ret	6	4	2	10	1	7	Ret	1	62
		20	12	2	2	3	7	7	10	1	2
2	PIAA Nakajima	31	2	4	1	8	Ret	Ret	1	3	7	50
		32	1	9	9	7	2	Ret	6	9	8
3	DoCoMo Dandelion	40	8	1	8	1	4	8	9	2	3	40
		41	7	7	Ret	10	6	10	2	Ret	10
4	LeMans LeMans Spirit	7	13	3	Ret	5	3	2	3	Ret	4	37
		8	11	10	7	11	8	5	Ret	Ret	5
		25	10	11	3	13	Ret	4	5	4	12
5	ADiRECT 5ZIGEN	1	5	12	5	4	1	6	Ret	5	6	26
		2	6	13	10	Ret	12	3	Ret	Ret	11
6	Yellow Hat Kondo	3	3	5	6	Ret	Ret	11	8	10	13	10
		4	Ret	NC	Ret	6	5	9	Ret	7	9
7	Cosmo Oil Cerumo	11	4	NC	12	9	DSQ	12	4	6	Ret	7
		12						Ret	11	Ret	15
8	Team MOHN	27				12	9			8		0
		28	9	8	11	Ret	11	Ret	Ret	11	14

• 2004 Japanese Championship Formula Nippon