# 1990 All Japan Sports Prototype Car Endurance Championship

The 1990 All Japan Sports Prototype Car Endurance Championship was the eighth season of the All Japan Sports Prototype Championship. The 1990 champion was the #24 Nissan Motorsports Nissan R91CP driven by Masahiro Hasemi and Anders Olofsson.

## Schedule

All races were held in Japan.
| Round | Race | Circuit | Date |
| 1 | JAF Grand Prix All Japan Fuji 500 km | Fuji Speedway | 11 March |
| 2 | Interchallenge Fuji 1000 km | Fuji Speedway | 5 May |
| 3 | All Japan Fuji 500 Miles | Fuji Speedway | 22 July |
| 4 | International Suzuka 1000 km | Suzuka Circuit | 26 August |
| 5 | SUGO International 500 km | Sportsland SUGO | 16 September |
| 6 | All Japan Fuji 1000 km | Fuji Speedway | 7 October |

## Entry list

| Team | Make | Car | No. | Engine | Drivers | Tyre | Rounds |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 956/82 3.2 L Twin Turbo F6 | 1 | Kunimitsu Takahashi | Y | All |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 956/82 3.2 L Twin Turbo F6 | 1 | Kazuo Mogi | Y | All |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 2 | Will Hoy | B | All |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 2 | Stanley Dickens | B | 1–2, 4–6 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 2 | Kenji Takahashi | B | 2 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 2 | David Sears | B | 3 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 7 | Tiff Needell | Y | All |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 7 | Costas Los | Y | 1–2 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 7 | Derek Bell | Y | 2–6 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 7 | Anthony Reid | Y | 4, 6 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 20 | Chiyomi Totani | D | 1, 3–4 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 20 | Luis Pérez-Sala | D | 1 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 20 | Manuel Reuter | D | 1–2, 4 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 20 | Maurizio Sandro Sala | D | 2 |
| Alpha Nova Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 20 | Allen Berg | D | 3 |
| Davey Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 19 | Tim Lee-Davey | D | 1 |
| Davey Racing | Porsche | Porsche 962C | Porsche 935/82 3.0 L Twin Turbo F6 | 19 | Bruno Giacomelli | D | 1 |
| Ao Racing | Spice | Spice SE90C | Ford DFZ 3.5 L V8 | 21 | Costas Los | D | 3–5 |
| Ao Racing | Spice | Spice SE90C | Ford DFZ 3.5 L V8 | 21 | Katsutomo Kaneishi | D | 3–5 |
| Ao Racing | Spice | Spice SE90C | Ford DFZ 3.5 L V8 | 21 | Kazuhiko Oda | D | 3 |
| Ao Racing | Spice | Spice SE90C | Ford DFZ 3.5 L V8 | 21 | Hideshi Matsuda | D | 4–5 |
| Nissan Motorsports | Nissan | Nissan R90CP | Nissan VRH35Z 3.5 L Twin Turbo V8 | 23 | Kazuyoshi Hoshino | D B | All |
| Nissan Motorsports | Nissan | Nissan R90CP | Nissan VRH35Z 3.5 L Twin Turbo V8 | 23 | Toshio Suzuki | D B | All |
| Nissan Motorsports | Nissan | Nissan R90CP | Nissan VRH35Z 3.5 L Twin Turbo V8 | 24 | Masahiro Hasemi | D | All |
| Nissan Motorsports | Nissan | Nissan R90CP | Nissan VRH35Z 3.5 L Twin Turbo V8 | 24 | Anders Olofsson | D | All |
| From A Racing | Porsche | Porsche 962C | Porsche 956/82 3.2 L Twin Turbo F6 | 27 | Akihiko Nakaya | B | All |
| From A Racing | Porsche | Porsche 962C | Porsche 956/82 3.2 L Twin Turbo F6 | 27 | Volker Weidler | B | All |
| From A Racing | Porsche | Porsche 962C | Porsche 956/82 3.2 L Twin Turbo F6 | 27 | Yukihiro Hane | B | All |
| Takefuji Racing Team [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 33 | Johnny Herbert | D | All |
| Takefuji Racing Team [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 33 | Bob Wollek | D | 1, 4–5 |
| Takefuji Racing Team [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 33 | Rickard Rydell | D | 2–4, 6 |
| Takefuji Racing Team [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 33 | Eddie Irvine | D | 2 |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 36 | Hitoshi Ogawa | B | All |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 36 | Masanori Sekiya | B | 1–5 |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 36 | Keiichi Suzuki | B | 4, 6 |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 36 | Takuya Kurosawa | B | 6 |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 37 | Geoff Lees | B | 4–5 |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 37 | Pierre-Henri Raphanel | B | 4–6 |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 37 | Hitoshi Ogawa | B | 6 |
| Toyota Team TOM'S | Toyota | Toyota 90C-V | Toyota R32V 3.2 L Turbo V8 (Rd. 1–2) Toyota R36V 3.6 L Turbo V8 (Rd. 3–6) | 37 | Masanori Sekiya | B | 6 |
| Toyota Team SARD | Toyota | Toyota 89C-V | Toyota R32V 3.2 L Turbo V8 | 39 | Roland Ratzenberger | D | 1–2 |
| Toyota Team SARD | Toyota | Toyota 89C-V | Toyota R32V 3.2 L Turbo V8 | 39 | Naoki Nagasaka | D | 1–2 |
| Toyota Team SARD | Toyota | Toyota 89C-V | Toyota R32V 3.2 L Turbo V8 | 39 | Pierre-Henri Raphanel | D | 1–2 |
| Toyota Team SARD | Toyota | Toyota 90C-V | Toyota R36V 3.6 L Turbo V8 | 39 | Roland Ratzenberger | D | All |
| Toyota Team SARD | Toyota | Toyota 90C-V | Toyota R36V 3.6 L Turbo V8 | 39 | Naoki Nagasaka | D | All |
| Omron Racing [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 55 | Eje Elgh | D | All |
| Omron Racing [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 55 | Vern Schuppan | D | 1–4 |
| Omron Racing [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 55 | Tomas Mezera | D | 2–6 |
| Team LeMans | Nissan | Nissan R89C | Nissan VRH35 3.5 L Twin Turbo V8 | 85 | Osamu Nakako | Y | All |
| Team LeMans | Nissan | Nissan R89C | Nissan VRH35 3.5 L Twin Turbo V8 | 85 | Takao Wada | Y | All |
| Team LeMans | Nissan | Nissan R89C | Nissan VRH35 3.5 L Twin Turbo V8 | 85 | Maurizio Sandro Sala | Y | 4 |
| British Barn Racing | British Barn | British Barn BB90R | Ford DFZ 3.5 L V8 | 88 | Jiro Yoneyama | D | 4–6 |
| British Barn Racing | British Barn | British Barn BB90R | Ford DFZ 3.5 L V8 | 88 | Hideo Fukuyama | D | 4, 6 |
| British Barn Racing | British Barn | British Barn BB90R | Ford DFZ 3.5 L V8 | 88 | Tsunehisa Asai | D | 4–5 |
| British Barn Racing | British Barn | British Barn BB90R | Ford DFZ 3.5 L V8 | 88 | Hisatoyo Goto | D | 5–6 |
| Trust Racing [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 100 | George Fouché | D | All |
| Trust Racing [ja] | Porsche | Porsche 962C | Porsche 935/83 3.0 L Twin Turbo F6 | 100 | Steven Andskär | D | All |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 201 | David Kennedy | D | 1, 3–6 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 201 | Takashi Yorino | D | 1–2 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 201 | Yojiro Terada | D | 2, 4 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 201 | Pierre Dieudonné | D | 3–6 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 202 | Yoshimi Katayama | D | 1–5 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 202 | Pierre Dieudonné | D | 1–2 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 202 | Yojiro Terada | D | 1, 3, 5–6 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 202 | David Kennedy | D | 2 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 202 | Takashi Yorino | D | 3–6 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 202 | Tetsuya Ota | D | 4 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 203 | Yoshimi Katayama | D | 6 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 203 | Maurizio Sandro Sala | D | 6 |
| Mazdaspeed | Mazda | Mazda 767 Mazda 767B | Mazda RE13J 2.6 L 4-rotor | 203 | Tetsuya Ota | D | 6 |
| Pleasure Racing | Mazda | Mazda 757 | Mazda RE13G 2.0 L 3-rotor | 230 | Tetsuji Shiratori | D | All |
| Pleasure Racing | Mazda | Mazda 757 | Mazda RE13G 2.0 L 3-rotor | 230 | Shuji Fujii | D | All |
| Pleasure Racing | Mazda | Mazda 757 | Mazda RE13G 2.0 L 3-rotor | 230 | Keiichi Mizutani | D | 4, 6 |
| Pleasure Racing | Mazda | Mazda 757 | Mazda RE13G 2.0 L 3-rotor | 230 | Seisaku Suzuki | D | 2–3, 5 |
| Lenox Racing | Mazda | Mazda 757 | Mazda RE13G 2.0 L 3-rotor | 240 | Kazuhiko Oda | D | 1–2, 6 |
| Lenox Racing | Mazda | Mazda 757 | Mazda RE13G 2.0 L 3-rotor | 240 | Keiichi Mizutani | D | 1–2 |
| Lenox Racing | Mazda | Mazda 757 | Mazda RE13G 2.0 L 3-rotor | 240 | Toshihiko Nogami | D | 2, 6 |

## Season results

Overall winner in bold. Season results as follows:
| Round | Circuit | Winning Team |
| Round | Circuit | Winning Drivers |
| 1 | Mt. Fuji | #36 Toyota Team TOM'S Toyota 90C-V |
| 1 | Mt. Fuji | Hitoshi Ogawa Masanori Sekiya |
| 2 | Mt. Fuji | Race Cancelled |
| 3 | Mt. Fuji | #24 Nissan Motorsports Nissan R90CP |
| 3 | Mt. Fuji | Masahiro Hasemi Anders Olofsson |
| 4 | Suzuka Circuit Report | #23 Nissan Motorsports Nissan R90CP |
| 4 | Suzuka Circuit Report | Kazuyoshi Hoshino Toshio Suzuki |
| 5 | Sportsland SUGO | #24 Nissan Motorsports Nissan R90CP |
| 5 | Sportsland SUGO | Masahiro Hasemi Anders Olofsson |
| 6 | Mt. Fuji Report | #38 Toyota Team SARD Toyota 89C-V |
| 6 | Mt. Fuji Report | Roland Ratzenberger Naoki Nagasaka |

## Point Ranking
### Drivers

| Rank | Drivers | Number/Team | Points | Wins | Distance |
| 1 | Masahiro Hasemi | #24 Nissan Motorsports Nissan R90CP | 67 | 2 | 2171.329 km |
| 2 | Anders Olofsson | #24 Nissan Motorsports Nissan R90CP | 67 | 2 | 1570.479 km |
| 3 | Kazuyoshi Hoshino | #23 Nissan Motorsports Nissan R90CP | 67 | 1 | 2094.272 km |
| 4 | Toshio Suzuki | #23 Nissan Motorsports Nissan R90CP | 67 | 1 | 1696.405 km |
| 5 | George Fouché | #100 Trust Racing [ja] Porsche 962C | 47 | 0 | 1669.178 km |
| 6 | Steven Andskär | #100 Trust Racing [ja] Porsche 962C | 47 | 0 | 1112.97 km |
| 7 | Stanley Dickens | #2 Alpha Nova Racing [ja] Porsche 962C | 43 | 0 | 1859.862 km |
| 8 | Will Hoy | #2 Alpha Nova Racing [ja] Porsche 962C | 43 | 0 | 1105.556 km |

### Makes

| Rank | Make | Points | Wins |
| 1 | Nissan | 90 | 3 |
| 2 | Porsche | 69 | 0 |
| 3 | Toyota | 64 | 2 |
| 4 | Mazda | 12 | 0 |
| 5 | Spice | 1 | 0 |