The 1989 All Japan Sports Prototype Car Endurance Championship was the seventh season of the All Japan Sports Prototype Championship. The 1989 champion was the #25 Advan Alpha Nova Porsche 962C driven by Kunimitsu Takahashi.
All races were held in Japan.
| Round | Race | Circuit | Date |
|---|---|---|---|
| 1 | All Japan Fuji 500 km | Fuji Speedway | 12 March |
| 2 | JAF Grand Prix All Japan Fuji 1000 km | Fuji Speedway | 30 April |
| 3 | All Japan Fuji 500 Miles | Fuji Speedway | 23 July |
| 4 1 | International Suzuka 1000 km | Suzuka Circuit | 3 December |
| 5 | Interchallenge Fuji 1000 km | Fuji Speedway | 8 October |
Season results as follows: [1]
| Round | Circuit | Winning Team |
|---|---|---|
| Winning Drivers | ||
| 1 | Mt. Fuji | #27 From A Racing Porsche 962C |
 Harald Grohs  Akihiko Nakaya | ||
| 2 | Mt. Fuji Report | #55 Omron Racing Porsche 962C |
 Vern Schuppan  Eje Elgh Keiji Matsumoto | ||
| 3 | Mt. Fuji | #16 Leyton House Racing Porsche 962C |
| Hideki Okada Masanori Sekiya | ||
| 4 | Suzuka Circuit Report | #25 Alpha Nova Porsche 962C |
| Kunimitsu Takahashi Stanley Dickens | ||
| 5 | Mt. Fuji | #38 Toyota Team TOM'S Toyota 89C-V |
Hitoshi Ogawa  Paolo Barilla | ||
| Rank | Drivers | Number/Team | Points | Wins | Distance |
|---|---|---|---|---|---|
| 1 | Kunimitsu Takahashi | #25 Alpha Nova Porsche 962C | 56 | 1 | 2077.617 km |
| 2 | Stanley Dickens | 56 | 1 | 1794.012 km | |
| 3 |  Geoff Lees | #36 Toyota Team TOM'S Toyota 89C-V | 55 | 0 | 1945.209 km |
| 4 | Steven Andskär | #100 Trust Racing Porsche 962C | 55 | 0 | 1379.514 km |
| 5 | Eje Elgh | #55 Omron Racing Porsche 962C | 47 | 1 | 1215.84 km |
| 6 | Vern Schuppan | 47 | 1 | 701.79 km | |
| Rank | Make | Points | Wins |
|---|---|---|---|
| 1 | Porsche | 95 | 4 |
| 2 | Toyota | 43 | 1 |
| 3 | Nissan | 24 | 0 |
| 4 | March-Nissan | 18 | 0 |
| 5 | Mazda | 18 | 0 |
| 6 | TOM'S-British Barn-Ford | 3 | 0 |
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