Entry list
C
- For the WEC-Japan event, JSPC teams used different car numbers to avoid conflicts with the car numbers of the entrants of the World Sportscar Championship; each car's WEC-Japan race number is displayed in tooltips.
The 1983 All Japan Endurance Championship was the inaugural season of the All Japan Sports Prototype Championship. The series champion was the #1 Trust Racing Team Porsche 956 driven by Australian Vern Schuppan, who earlier in the year had won the 1983 24 Hours of Le Mans.
All races were held in Japan.
| Round | Race | Circuit | Date |
|---|---|---|---|
| 1 | International Suzuka 500 km | Suzuka Circuit | 3 April |
| 2 | International Suzuka 1000 km | 28 August | |
| 3 | WEC-Japan | Fuji Speedway | 2 October |
Season results are as follows: [1]
| Round | Circuit | Winning team |
|---|---|---|
| Winning drivers | ||
| 1 | Suzuka Circuit | #1 Trust Racing Team Porsche 956 |
 Vern Schuppan  Naohiro Fujita | ||
| 2 | Suzuka Circuit Report | #1 Trust Racing Team Porsche 956 |
| Vern Schuppan Naohiro Fujita | ||
| 3 | Mt. Fuji Report | #2 Rothmans Porsche 956 |
 Derek Bell  Stefan Bellof | ||
| Rank | Drivers | Number/Team | Points | Wins |
|---|---|---|---|---|
| 1 | Vern Schuppan | #1 Trust Racing Team Porsche 956 #6 Trust Racing Team Porsche 956 | 52 | 2 |
| 2 | Naohiro Fujita | 52 | 2 | |
| 3 | Taku Akaike | #7 Alpha Racing Team MCS Guppy-Mazda #62 Alpha Racing Team Mazda 83C | 24 | 0 |
| 4 | Stefan Bellof | #2 Rothmans Porsche 956 | 20 | 1 |
| 5 | Derek Bell | 20 | 1 | |
