(Car Appearance)
| No. | Car | Entrant | Sponsors | Tyres | Body | Engine |
| 5 | GC21 Toyota | Nova Engineering | PLANEX | Bridgestone | open | mid |
| 10 | GC21 Toyota | | Kyouei/San Pokka | Bridgestone | open | mid |
| 11 | GC21 Toyota | | Goodwood | Bridgestone | open | mid |
| 14 | GC21 Toyota | | H Factory | Bridgestone | open | mid |
| 18 | GC21 Toyota | Aim Sports | | Bridgestone | open | mid |
| 33 | GC21 Toyota | | Recaldent | Bridgestone | open | mid |
| 62 | GC21 Toyota | R&D Sport | | Bridgestone | open | mid |
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