# 1993 All Japan Grand Touring Car Championship

The 1993 All Japan Grand Touring Car Championship was the inaugural season of the Japan Automobile Federation All-Japan Grand Touring Car Championship and the successor series to the All Japan Sports Prototype Championship as international prototypes were in a state of flux in the early 1990s, and sportscar racing globally had switched from prototypes to grand tourers. It was marked as well as the eleventh season of a JAF-sanctioned sports car racing championship dating back to the All Japan Sports Prototype Championship.
Most events were staged as joint-races with the upstart Japan Super Sports Sedan Championship, and the IMSA GT Championship, with only a small handful of cars entered in the "GTS" category that would later evolve into the current GT500 class - and in fact, only one such car took part in that year's Suzuka 1000km against several Group C prototypes and sports cars from the N1 Endurance Series. Because the format and structure of the races were so different from what would come in future seasons, the 1993 season is not recognized by the GT Association (GTA), who were incorporated in 1994 to promote the All-Japan GT Championship (later to become Super GT).
The championship was contested over four rounds, and Masahiko Kageyama was declared the champion, driving a Nissan Skyline GT-R. He would also win the final All-Japan Touring Car Championship to be run to Group A regulations in the same year.

## Drivers and teams
### GT1

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| NISMO | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 2 | Masahiko Kageyama | B | 1–2, 4 |
| Joe Llauget | Oldsmobile | Oldsmobile Cutlass IMSA GTO | Oldsmobile 6.0 L V8 | 12 | Joe Llauget | G | 1 |
| Lindley Racing | Ford | Ford Mustang IMSA GTO | Ford 6.0 L V8 | 48 | Les Lindley | G | 1 |
| Tommy Riggins | Oldsmobile | Oldsmobile Cutlass IMSA GTO | Oldsmobile 6.0 L V8 | 53 | Tommy Riggins | G | 1 |

### GT2

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| NISMO | Nissan | Nissan Silvia | Nissan FJ20DET 2.0 L Turbo I4 | 3 | Takayuki Kinoshita | Y | 1–2 |
| NISMO | Nissan | Nissan Silvia | Nissan FJ20DET 2.0 L Turbo I4 | 3 | Hideo Fukuyama | Y | 4 |
| Auberlen Racing Concepts | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 19 | Bill Auberlen | Y | 1 |
| Jack Lewis Enterprises | Porsche | Porsche 964 RS | Porsche M64/03 3.8 L F6 | 73 | Jack Lewis | Y | 1 |
| Leitzinger Racing | Nissan | Nissan Silvia | Nissan VQ30DE 3.0 L V6 | 95 | Bob Leitzinger | T | 1 |
| Leitzinger Racing | Nissan | Nissan Silvia | Nissan VQ30DE 3.0 L V6 | 97 | Frank Honsowetz | T | 1 |

### JSS

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| RS Nakaharu | Nissan | Nissan Silvia | Nissan FJ20DET 2.0 L Turbo I6 | 5 | Hiroyasu Aoyagi | B | 1–2, 4 |
| RS Nakaharu | Nissan | Nissan Silvia | Nissan FJ20DET 2.0 L Turbo I6 | 24 | Seiichi Sodeyama | B | 1–2, 4 |
| RS Nakaharu | Nissan | Nissan Silvia | Nissan FJ20DET 2.0 L Turbo I6 | 25 | Minoru Saotome | B | 2 |
| RE Amemiya Racing | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 6 | Katsuo Kobayashi | D | 1 |
| RE Amemiya Racing | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 10 | Tadashi Mizuno | D | 1–2, 4 |
| ERC | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 9 | Tetsuya Kawasaki | D | 1 |
| ERC | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 11 | Takemasa Okazaki | D | 1–2 |
| ERC | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 12 | Tetsuya Kawasaki | D | 4 |
| Hiromoto Ishimori | Nissan | Nissan Skyline GTS-R | Nissan RB20DET 2.0 L Turbo I6 | 13 | Hiromoto Ishimori | B | 1–2, 4 |
| Katsumi Mochizuki | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 17 | Katsumi Mochizuki | D | 1–2 |
| Kenji Tohira | Nissan | Nissan Skyline GTS-R | Nissan RB20DET 2.0 L Turbo I6 | 22 | Kenji Tohira | B | 1–2 |
| Atsushi Hayakawa | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 33 | Atsushi Hayakawa | D | 1–2 |
| Tetsuo Kozai | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 37 | Tetsuo Kozai | D | 1–2, 4 |
| Shunichi Mori | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 39 | Shunichi Mori | D | 1–2, 4 |
| Katsutoshi Ito | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 40 | Katsutoshi Ito | D | 1, 4 |
| Toshiro Fukazawa | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 55 | Toshiro Fukazawa | D | 1–2, 4 |
| Yoshimi Ishibashi | Nissan | Nissan Skyline GTS-R | Nissan RB20DET 2.0 L Turbo I6 | 70 | Yoshimi Ishibashi | Y | 1–2, 4 |

### C1

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Le Mans Company | Nissan | Nissan R92CP | Nissan VRH35Z 3.5 L Twin Turbo V8 | 25 | Takao Wada | B | 3 |
| Le Mans Company | Nissan | Nissan R92CP | Nissan VRH35Z 3.5 L Twin Turbo V8 | 25 | Toshio Suzuki | B | 3 |
| Nova Engineering | Nissan | Nissan R90CK | Nissan VRH35Z 3.5 L Twin Turbo V8 | 27 | Mauro Martini | B | 3 |
| Nova Engineering | Nissan | Nissan R90CK | Nissan VRH35Z 3.5 L Twin Turbo V8 | 27 | Heinz-Harald Frentzen | B | 3 |

### GT-N3

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| NISMO | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 2 | Masahiko Kageyama | B | 3 |
| NISMO | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 2 | Jeff Krosnoff | B | 3 |

### GTS

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Competition Motorsport South | Chevrolet | Chevrolet Camaro | Chevrolet 6.0 L V8 | 11 | Kenny Bupp Jr. | G | 3 |
| Competition Motorsport South | Chevrolet | Chevrolet Camaro | Chevrolet 6.0 L V8 | 11 | Robert Peters | G | 3 |
| Competition Motorsport South | Chevrolet | Chevrolet Camaro | Chevrolet 6.0 L V8 | 11 | Luis Sereix | G | 3 |
| Lindley Racing | Ford | Ford Mustang IMSA GTO | Ford 6.0 L V8 | 48 | Les Lindley | G | 3 |
| Lindley Racing | Ford | Ford Mustang IMSA GTO | Ford 6.0 L V8 | 48 | Bob Sobey | G | 3 |

### GTU

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Dibós Racing Team Peru | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 84 | Eduardo Dibós | Y | 3 |
| Dibós Racing Team Peru | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 84 | Juan Dibós | Y | 3 |

### Lights

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Comptech Acura Spice Racing | Spice | Spice SE91P | Acura 3.0 L V6 | 49 | Parker Johnstone | G | 3 |
| Comptech Acura Spice Racing | Spice | Spice SE91P | Acura 3.0 L V6 | 49 | Dan Marvin | G | 3 |

### LM GT4

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Roock Racing | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 37 | Dieter Köll | P | 3 |
| Roock Racing | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 37 | Philippe Albera | P | 3 |
| Roock Racing | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 37 | Akihiko Nakaya | P | 3 |
| Chamberlain Engineering | Lotus | Lotus Esprit Sport 200 | Lotus 912 2.2 L I4 | 44 | Gordon Kellett | P | 3 |
| Chamberlain Engineering | Lotus | Lotus Esprit Sport 200 | Lotus 912 2.2 L I4 | 44 | Hideshi Matsuda | P | 3 |
| Chamberlain Engineering | Lotus | Lotus Esprit Sport 200 | Lotus 912 2.2 L I4 | 44 | Tomiko Yoshikawa | P | 3 |
| Chamberlain Engineering | Lotus | Lotus Esprit Sport 200 | Lotus 912 2.2 L I4 | 45 | Yojiro Terada | P | 3 |
| Chamberlain Engineering | Lotus | Lotus Esprit Sport 200 | Lotus 912 2.2 L I4 | 45 | Tetsuya Ota | P | 3 |
| Chamberlain Engineering | Lotus | Lotus Esprit Sport 200 | Lotus 912 2.2 L I4 | 45 | Tom Langeberg | P | 3 |
| Larbre Compétition | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 47 | Dominique Dupuy | Y | 3 |
| Larbre Compétition | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 47 | Jesús Pareja | Y | 3 |
| Larbre Compétition | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 47 | Jack Laconte | Y | 3 |
| HEICO Motorsport | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 65 | Jürgen Barth | Y | 3 |
| HEICO Motorsport | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 65 | Dirk Ebeling | Y | 3 |
| HEICO Motorsport | Porsche | Porsche 964 RSR | Porsche M64/03 3.8 L F6 | 65 | Karl-Heinz Wlazik | Y | 3 |

### N1-1

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Motor Sport Division | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 1 | Masami Miyoshi | D | 3 |
| Motor Sport Division | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 1 | Motoji Sekine | D | 3 |
| Beldear Corporation | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 7 | Hideo Fukuyama | T | 3 |
| Beldear Corporation | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 7 | Kumi Sato | T | 3 |
| Revolver | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 8 | Yoshinori Hasegawa | Y | 3 |
| Revolver | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 8 | Motonobu Sakamoto | Y | 3 |
| Knight Sport | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 9 | Fuminori Mizuno | Y | 3 |
| Knight Sport | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 9 | Yasuo Kusakabe | Y | 3 |
| Knight Sport | Mazda | Mazda RX-7 | Mazda RE13B 1.3 L 2-rotor | 9 | Yasufumi Yamazaki | Y | 3 |
| Susuki Racing Mechanics | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 15 | Katsuhiko Okamoto | Y | 3 |
| Susuki Racing Mechanics | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 15 | Shinya Motoyoshi | Y | 3 |
| Team Actor | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 16 | Junya Oshima | T | 3 |
| Team Actor | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 16 | Akihiko Koto | T | 3 |
| Team Actor | Nissan | Nissan Skyline GT-R | Nissan RB26DETT 2.6 L Twin Turbo I6 | 16 | Yoichi Fukudome | T | 3 |

### N1-2

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Nakajima Planning | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 6 | Koji Sato | B | 3 |
| Nakajima Planning | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 6 | Hidetoshi Mitsusada | B | 3 |
| Gazas | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 21 | Kazuo Shimizu | T | 3 |
| Gazas | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 21 | Masami Kageyama | T | 3 |
| Gazas | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 21 | Takahiko Hara | T | 3 |
| Formula Spirit | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 26 | Daniel Latour | T | 3 |
| Formula Spirit | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 26 | Takeshi Tsuchiya | T | 3 |
| Formula Spirit | Honda | Honda Prelude | Honda H22A 2.2 L I4 | 26 | Tatsuya Tanigawa | T | 3 |

### N1-3

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Team A-One | Honda | Honda Civic SiR | Honda B16A2 1.6 L I4 | 6 | Ryo Michigami | T | 3 |
| Team A-One | Honda | Honda Civic SiR | Honda B16A2 1.6 L I4 | 6 | Atsushi Okuda | T | 3 |
| Team A-One | Honda | Honda Civic SiR | Honda B16A2 1.6 L I4 | 6 | Yoshihisa Fujita | T | 3 |

### RS

| Team | Make | Car | Engine | No. | Drivers | Tyre | Rounds |
| Cosmos Racing | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 5 | Masaki Ohashi | D | 3 |
| Cosmos Racing | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 5 | Katsunori Yamamoto | D | 3 |
| Cosmos Racing | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 5 | Yoshifumi Yamazaki | D | 3 |
| Cosmos Racing | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 73 | Yoichiro Suzuki | D | 3 |
| Cosmos Racing | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 73 | Akio Tomita | D | 3 |
| Cosmos Racing | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 73 | Naoto Chikada | D | 3 |
| Trident | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 10 | Koichi Hamada | D | 3 |
| Trident | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 10 | Minetaka Mizuno | D | 3 |
| Trident | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 10 | Tadayuki Sato | D | 3 |
| Car Graphic Racing Team | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 17 | Masayoshi Furuya | D | 3 |
| Car Graphic Racing Team | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 17 | Masahiro Tejima | D | 3 |
| Car Graphic Racing Team | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 17 | Hisashi Tukahara | D | 3 |
| Mascrat Racing Team | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 23 | Tsuguo Yagyu | Y | 3 |
| Mascrat Racing Team | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 23 | Mari Nagata | Y | 3 |
| Mascrat Racing Team | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 23 | Katsuto Kinugasa | Y | 3 |
| Mitsuo Yamamoto | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 51 | Mitsuo Yamamoto | D | 3 |
| Mitsuo Yamamoto | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 51 | Genji Hashimoto | D | 3 |
| Jikanwari | West | West 89S | Mazda RE13B 1.3 L 2-rotor | 52 | Tomohiro Tomasu | D | 3 |
| Jikanwari | West | West 89S | Mazda RE13B 1.3 L 2-rotor | 52 | Michiko Hashimoto | D | 3 |
| IZUMODEN | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 55 | Yoshiyuki Ogura | Y | 3 |
| IZUMODEN | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 55 | Keiichi Mizutani | Y | 3 |
| IZUMODEN | Oscar | Oscar SK90 | Mazda RE13B 1.3 L 2-rotor | 55 | Hajime Oshiro | Y | 3 |

## Schedule

| Round | Race | Circuit | Date |
| 1 | IMSA GT Fuji | Fuji Speedway | March 28 |
| 2 | Fuji 100 km | Fuji Speedway | May 30 |
| 3 | Suzuka 1000 km | Suzuka Circuit | August 29 |
| 4 | Fuji F3000 | Fuji Speedway | October 17 |

## Race results

| Round | Circuit | Date | Pole Position | Winner |
| 1 | Fuji Speedway | March 28 | #2 NISMO | #2 NISMO |
| 1 | Fuji Speedway | March 28 | Masahiko Kageyama | Masahiko Kageyama |
| 2 | Fuji Speedway | May 30 | #2 NISMO | #2 NISMO |
| 2 | Fuji Speedway | May 30 | Masahiko Kageyama | Masahiko Kageyama |
| 3 | Suzuka Circuit | August 29 | #27 Nova Engineering | #25 Le Mans Company |
| 3 | Suzuka Circuit | August 29 | Mauro Martini Heinz-Harald Frentzen | Takao Wada Toshio Suzuki |
| 4 | Fuji Speedway | October 17 | #2 NISMO | #2 NISMO |
| 4 | Fuji Speedway | October 17 | Masahiko Kageyama | Masahiko Kageyama |