The 1985 All Japan Endurance Championship was the third season of the All Japan Sports Prototype Championship. The 1985 champion was the #25 Advan Sports Nova Porsche 962C driven by Kunimitsu Takahashi.
| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
|---|---|---|---|---|---|---|---|
| Kawamura Bankin [N 3] | Nissan | Nissan Sunny | Nissan A12 1.3 L I4 | 10 | | D | 1 |
| | 1 | ||||||
| Ogawa | Nissan | Nissan Sunny | Nissan A12 1.3 L I4 | 15 | | D | 1 |
| | 1 | ||||||
| Car Shop Kakogawa | Nissan | Nissan Sunny | Nissan A12 1.3 L I4 | 18 | | D | 1 |
| | 1 | ||||||
| Nagao Fukushima | Toyota | Toyota Starlet | Toyota 4K-E 1.3 L I4 | 98 | | D | 1 |
| | 1 | ||||||
| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
|---|---|---|---|---|---|---|---|
| Norikura Engineering | Nissan | Nissan Silvia | Nissan FJ20 2.1 L I4 | 176 | | B | 5 |
| | 5 | ||||||
| | 5 | ||||||
| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
|---|---|---|---|---|---|---|---|
| Myspeed | Toyota | Toyota Sprinter Trueno | Toyota 4A 1.6 L I4 | 5 | | D | 2 |
| 2 | |||||||
| Toshio Aoyama | Toyota | Toyota Corolla Levin | Toyota 4A 1.6 L I4 | 19 | | D | 6 |
| | 6 | ||||||
| Trust Racing Team | Toyota | Toyota Celica LB Turbo | Toyota 18R-G 2.1 L Turbo I4 | 21 | | D | 2–3, 6 |
| | 2–3, 6 | ||||||
| | 3 | ||||||
| Asano Racing Service | Toyota | Toyota Corolla Levin | Toyota 4A 1.6 L I4 | 47 | | B | 6 |
| | 6 | ||||||
| Kaneshin | Toyota | Toyota Starlet | Toyota 4K-E 1.3 L I4 | 48 | | B | 6 |
| | 6 | ||||||
| Sinzan Tyre | Nissan | Nissan Sunny | Nissan A12 1.3 L I4 | 50 | | Y | 6 |
| | 6 | ||||||
| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
|---|---|---|---|---|---|---|---|
| Chubu Jidosha Racing | Nissan | Nissan Sunny | Nissan A12 1.3 L I4 | 10 | | Y | 1 |
| | 1 | ||||||
| | 1 | ||||||
| Matsuoka | Nissan | Nissan Sunny | Nissan A12 1.3 L I4 | 31 | | B | 3 |
| | 3 | ||||||
| SCCN | Nissan | Nissan Sunny | Nissan A12 1.3 L I4 | 50 | | B | 3 |
| | 3 | ||||||
All races were held in Japan.
| Round | Race | Circuit | Date |
|---|---|---|---|
| 1 | International Suzuka 500 km | Suzuka Circuit | 7 April |
| 2 | All Japan Fuji 1000 km | Fuji Speedway | 5 May |
| 3 | All Japan Fuji 500 Miles | Fuji Speedway | 28 July |
| 4 | International Suzuka 1000 km | Suzuka Circuit | 25 August |
| 5 | WEC-Japan | Fuji Speedway | 10 October |
| 6 | All Japan Fuji 500 km | Fuji Speedway | 24 November |
Season results are as follows: [1]
| Round | Circuit | Winning team |
|---|---|---|
| Winning drivers | ||
| 1 | Suzuka Circuit Report | #38 Dome Motorsport Dome 84C-Toyota |
| | ||
| 2 | Mt. Fuji Report | #1 Trust Racing Team Porsche 956 |
| | ||
| 3 | Mt. Fuji | #25 Advan Sports Nova Porsche 962C |
| | ||
| 4 | Suzuka Circuit Report | #25 Advan Sports Nova Porsche 962C |
| | ||
| 5 | Mt. Fuji Report | #28 Hoshino Racing March 85G |
| | ||
| 6 | Mt. Fuji | #25 Advan Sports Nova Porsche 962C |
| | ||
| Rank | Drivers | Number/Team | Points | Wins |
|---|---|---|---|---|
| 1 | | #25 Advan Sports Nova Porsche 962C | 72 | 3 |
| 2 | | 72 | 3 | |
| 3 | | #1 Trust Racing Team Porsche 956 #60 Trust Racing Team Porsche 956 | 46 | 1 |
| 4 | | #38 Dome Motorsport Dome 84C-Toyota #38 Dome Motorsport Dome 85C-Toyota | 41 | 1 |
| 5 | | 36 | 1 | |