The 1998 Formula Nippon Championship was scheduled over 10 rounds and contested over 9 rounds. 14 different teams, 29 different drivers, 3 different chassis and only 1 engine competed in the series. Each round saw a Special Stage after the original qualifying. The best six qualifiers had to compete in a separate session for the pole.
| Team | # | Driver | Chassis | Engine | Rounds |
|---|---|---|---|---|---|
| Shionogi Team Nova | 1 | | Lola T97/51 | Mugen MF308 | All |
| 2 | | Lola T96/51 | All | ||
| Asahi Kiko Sports | 3 | | Reynard 96D | Mugen MF308 | All |
| Team 5ZIGEN | 5 | | Reynard 97D | Mugen MF308 | All |
| 6 | | Reynard 96D | All | ||
| LEMONed Racing Team LeMans | 7 | | Reynard 97D | Mugen MF308 | All |
| 8 | | All | |||
| Cosmo Oil Racing Team Cerumo | 11 | | Lola T98/51 | Mugen MF308 | All |
| 12 | | Lola T96/52 | 3–10 | ||
| Jaccs Mooncraft M.S.P | 14 | | Reynard 96D | Mugen MF308 | All |
| Team TMS | 17 | | Reynard 97D | Mugen MF308 | All |
| 18 | | 1–2 | |||
| | 3–10 | ||||
| Maziora Team Impul | 19 | | Lola T98/51 | Mugen MF308 | All |
| 20 | | Lola T96/52 | All | ||
| Be Brides Racing | 21 | | Lola T95/50 | Mugen MF308 | All |
| 22 | | Lola T96/52 | All | ||
| Kyoetsu Stellar Stellar International | 35 | | Reynard 96D | Mugen MF308 | 1 |
| | 7–9 | ||||
| Takagi B-1 Racing | 36 | | Lola T96/51 | Mugen MF308 | All |
| 37 | | Lola T95/50 Lola T94/50 | 2–5 | ||
| Autobacs Racing Team Aguri | 55 | | Lola T98/51 | Mugen MF308 | All |
| 56 | | Lola T97/51 | All | ||
| Team LeyJun | 62 | | Reynard 95D Reynard 96D | Mugen MF308 | All |
| 63 | | Reynard 95D Reynard 97D | 1, 4–10 | ||
| | 2–3 | ||||
| PIAA Nakajima Racing | 64 | | Reynard 97D | Mugen MF308 | 1–4, 6–10 |
| | 5 | ||||
| 65 | | All |
^ Masao Yamada died from a subarachnoid hemorrhage on 12 July 1998. [1]
All races were held in Japan.
Race 7 was not held due to bad weather conditions
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|
| Points | 10 | 6 | 4 | 3 | 2 | 1 |
| Rank | Name | SUZ | MIN | FUJ | MOT | SUZ | SGO | FUJ | MIN | FUJ | SUZ | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | | Ret | 1 | 1 | 2 | Ret | 4 | C | 1 | 2 | Ret | 45 |
| 2 | | 2 | 10 | Ret | 3 | 3 | 1 | C | 6 | 4 | 1 | 38 |
| 3 | | Ret | 2 | Ret | 1 | 4 | Ret | C | Ret | Ret | 2 | 25 |
| 4 | | 3 | Ret | 6 | Ret | Ret | Ret | C | 2 | 1 | 8 | 21 |
| 5 | | 1 | Ret | Ret | 8 | 1 | Ret | C | Ret | Ret | 6 | 21 |
| 6 | | 6 | 4 | Ret | Ret | 2 | Ret | C | 3 | Ret | 4 | 17 |
| 7 | | 4 | 5 | 2 | Ret | Ret | 7 | C | 5 | 10 | Ret | 13 |
| 8 | | 12 | Ret | Ret | Ret | Ret | 2 | C | 4 | 3 | 7 | 13 |
| 9 | | 7 | 3 | 4 | 9 | Ret | Ret | C | Ret | Ret | 3 | 11 |
| 10 | | 5 | Ret | 5 | 6 | Ret | 3 | C | Ret | 9 | Ret | 9 |
| 11 | | 8 | 6 | Ret | 4 | 5 | 5 | C | Ret | Ret | 14 | 8 |
| 12 | | Ret | Ret | 3 | Ret | Ret | Ret | C | Ret | Ret | 5 | 6 |
| 13 | | 9 | 5 | Ret | Ret | C | Ret | Ret | 9 | 2 | ||
| 14 | | 8 | Ret | Ret | 9 | C | Ret | 5 | 12 | 2 | ||
| 15 | | 6 | 1 | |||||||||
| 16 | | Ret | 7 | Ret | Ret | 6 | C | Ret | Ret | 11 | 1 | |
| 17 | | Ret | Ret | 7 | Ret | Ret | 11 | C | Ret | 6 | 16 | 1 |
| 18 | | 9 | 8 | 11 | 10 | 7 | 8 | C | 7 | 7 | Ret | 0 |
| 19 | | 10 | Ret | 10 | 7 | Ret | Ret | C | Ret | Ret | 10 | 0 |
| 20 | | Ret | Ret | Ret | 11 | 9 | 10 | C | Ret | 8 | 15 | 0 |
| 21 | | Ret | 11 | 14 | 13 | Ret | Ret | C | 8 | Ret | 17 | 0 |
| 22 | | 13 | Ret | Ret | 13 | C | 9 | Ret | 18 | 0 | ||
| 23 | | Ret | 9 | Ret | Ret | Ret | Ret | C | Ret | Ret | 13 | 0 |
| 24 | | 11 | Ret | 12 | 12 | Ret | Ret | C | 10 | Ret | Ret | 0 |
| 25 | | C | Ret | 12 | 0 | |||||||
| 26 | | Ret | 13 | 0 | ||||||||
| 27 | | 14 | Ret | 0 | ||||||||
| 28 | | Ret | 15 | Ret | DNQ | 0 | ||||||
| 29 | | Ret | 0 |
| Rank | Name | Car | SUZ | MIN | FUJ | MOT | SUZ | SGO | FUJ | MIN | FUJ | SUZ | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | LEMONed LeMans | 7 | 3 | Ret | 6 | Ret | Ret | Ret | C | 2 | 1 | 8 | 66 |
| 8 | Ret | 1 | 1 | 2 | Ret | 4 | C | 1 | 2 | Ret | |||
| 2 | Shionogi Nova | 1 | 2 | 10 | Ret | 3 | 3 | 1 | C | 6 | 4 | 1 | 51 |
| 2 | 12 | Ret | Ret | Ret | Ret | 2 | C | 4 | 3 | 7 | |||
| 3 | ARTA | 55 | 4 | 5 | 2 | Ret | Ret | 7 | C | 5 | 10 | Ret | 38 |
| 56 | Ret | 2 | Ret | 1 | 4 | Ret | C | Ret | Ret | 2 | |||
| 4 | Maziora Impul | 19 | Ret | Ret | 3 | Ret | Ret | Ret | C | Ret | Ret | 5 | 27 |
| 20 | 1 | Ret | Ret | 8 | 1 | Ret | C | Ret | Ret | 6 | |||
| 5 | 5ZIGEN | 5 | 6 | 4 | Ret | Ret | 2 | Ret | C | 3 | Ret | 4 | 14 |
| 6 | 10 | Ret | 10 | 7 | Ret | Ret | C | Ret | Ret | 10 | |||
| 6 | Jaccs Mooncraft | 14 | 7 | 3 | 4 | 9 | Ret | Ret | C | Ret | Ret | 3 | 14 |
| 7 | Cosmo Oil Cerumo | 11 | 5 | Ret | 5 | 6 | Ret | 3 | C | Ret | 9 | Ret | 11 |
| 12 | 8 | Ret | Ret | 9 | C | Ret | 5 | 12 | |||||
| 8 | PIAA Nakajima | 64 | Ret | 7 | Ret | Ret | 6 | 6 | C | Ret | Ret | 11 | 10 |
| 65 | 8 | 6 | Ret | 4 | 5 | 5 | C | Ret | Ret | 14 | |||
| 9 | Team TMS | 17 | 9 | 8 | 11 | 10 | 7 | 8 | C | 7 | 7 | Ret | 2 |
| 18 | 14 | Ret | 9 | 5 | Ret | Ret | C | Ret | Ret | 9 | |||
| 10 | Be Brides | 21 | Ret | Ret | 7 | Ret | Ret | 11 | C | Ret | 6 | 16 | 1 |
| 22 | Ret | Ret | Ret | 11 | 9 | 10 | C | Ret | 8 | 15 | |||
| 11 | Asahi Kiko Sports | 3 | Ret | 9 | Ret | Ret | Ret | Ret | C | Ret | Ret | 13 | 0 |
| 12 | Takagi B-1 Racing | 36 | Ret | 11 | 14 | 13 | Ret | Ret | C | 8 | Ret | 17 | 0 |
| 37 | Ret | 15 | Ret | DNQ | |||||||||
| 13 | Team LeyJun | 62 | 11 | Ret | 12 | 12 | Ret | Ret | C | 10 | Ret | Ret | 0 |
| 63 | 13 | Ret | 13 | Ret | Ret | 13 | C | 9 | Ret | 18 | |||
| 14 | Kyoetsu Stellar Stellar International | 35 | Ret | C | Ret | 12 | 0 |