The 2004 All Japan Grand Touring Car Championship was the twelfth season of Japan Automobile Federation GT premiere racing and the final season under the name All Japan Grand Touring Car Championship as for 2005 the series was renamed to Super GT. It was marked as well as the twenty-second season of a JAF-sanctioned sports car racing championship dating back to the All Japan Sports Prototype Championship. The GT500 class champions of 2004 were the #1 Xanavi NISMO Nissan Fairlady Z team driven by Satoshi Motoyama and Richard Lyons and the GT300 class champions were the #16 M-TEC Honda NSX driven by Tetsuya Yamano and Hiroyuki Yagi.
| Round | Race | Circuit | Date |
|---|---|---|---|
| 1 | GT Championship in TI |  TI Circuit
|
April 4 |
| 2 | SUGO GT Championship | Sportsland SUGO
|
May 23 |
| 3 | Japan GT Championship Malaysia |  Sepang Circuit
|
June 19 |
| 4 | Hokkaido Gran GT Championship | Tokachi International Speedway
|
July 18 |
| 5 | Motegi GT Championship Race | Twin Ring Motegi
|
September 5 |
| 6 | Japan GT in Kyushu 300 km | Autopolis
|
October 31 |
| 7 | Suzuka GT 300 km | Suzuka Circuit
|
November 21 |
| NC | JGTC All-Star GT Live USA |  California Speedway
|
December 18 |
| December 19 |
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th |
|---|---|---|---|---|---|---|---|---|---|---|
| Points | 20 | 15 | 12 | 8 | 6 | 5 | 4 | 3 | 2 | 1 |
| Qualifying | 2 | 1 | 1 | |||||||
| Fastest Lap | 1 | 1 | 1 |
|
|
For teams that entered multiple cars, only the best result from each round counted towards the teams' championship.[1]
| Rank | Driver | No. | TAI
|
SUG
|
SEP
|
TOK
|
MOT
|
AUT
|
SUZ
|
PTS |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Nismo | 1 | 1 | DNS | 3 | Ret | 3 | 1 | 7 | 98 |
| 22 | 9 | Ret | 6 | 1 | 8 | 9 | Ret | |||
| 2 | Toyota Team SARD | 39 | 3 | Ret | 1 | 7 | 6 | 2 | 8 | 61 |
| 3 | Toyota Team TOM'S | 36 | 7 | 7 | 10 | 4 | 5 | 7 | 2 | 60 |
| 37 | 11 | 3 | 5 | 5 | 4 | 6 | 6 | |||
| 4 | Esso Toyota Team LeMans | 6 | 2 | 11 | 14 | 2 | 2 | 4 | Ret | 57 |
| 5 | Hasemi Motorsport | 3 | 6 | 6 | 4 | 3 | 7 | Ret | 3 | 50 |
| 6 | Toyota Team Cerumo | 38 | 5 | 1 | 7 | 14 | 10 | 11 | 4 | 45 |
| 7 | Epson Nakajima Racing | 32 | 10 | 4 | 9 | 6 | 1 | 12 | 5 | 42 |
| 8 | Kraft | 35 | 4 | 5 | 2 | 9 | 13 | 8 | 16 | 37 |
| 9 | Team Impul | 12 | 8 | 10 | Ret | 11 | Ret | 5 | 1 | 35 |
| 10 | Team Advan Tsuchiya | 25 | 14 | 2 | Ret | 13 | 12 | 3 | 10 | 31 |
| 11 | Team Kunimitsu with Mooncraft | 100 | Ret | 8 | 15 | 10 | 9 | 10 | 9 | 9 |
| 12 | Dome Racing Team | 18 | 12 | 12 | 8 | 8 | 15 | 14 | 12 | 6 |
| 13 | Autobacs Racing Team Aguri | 8 | 13 | 9 | 11 | 12 | 11 | 13 | 11 | 2 |
| - | Amprex Motorsports | 15 | 12 | 15 | 0 | |||||
| - | Hitotsuyama Racing | 21 | 15 | DNQ | 13 | 16 | 14 | 15 | 14 | 0 |
| - | R&D Sport | 62 | 13 | 0 | ||||||
| - | JLOC | 88 | DNQ | Ret | DNQ | Ret | Ret | 15 | 0 | |
| Rank | Driver | No. | TAI
|
SUG
|
SEP
|
TOK
|
MOT
|
AUT
|
SUZ
|
PTS |
| Rank | Drivers | Number/Team | Points | Wins |
|---|---|---|---|---|
| 1 | Tetsuya Yamano Hiroyuki Yagi
|
#16 M-TEC Honda NSX | 93 | 1 |
| 2 | Morio Nitta Shinichi Takagi
|
#43 ARTA ASL Garaiya | 92 | 2 |
| 3 | Atsushi Yogo Tetsuya Tanaka
|
#10 Team Gainer Ferrari F360 | 64 | 1 |
| 4 | Shinichi Yamaji Hiroyuki Iiri
|
#7 RE Amemiya Mazda RX-7 | 55 | 2 |
| 5 | Takayuki Aoki Nobuteru Taniguchi
|
#19 WedsSport Toyota Celica | 48 | 1 |
