| Event: | Judo |
| Games: | 1990 Asian Games |
| Venue: | Yuetan Gymnasium |
| Dates: | 28 September – 1 October 1990 |
| Prev: | 1986 |
| Next: | 1994 |
The Judo competition at the 1990 Asian Games was contested in sixteen weight classes, eight each for men and women.
| Extra lightweight (−60 kg) | |||
| Half lightweight (−65 kg) | |||
| Lightweight (−71 kg) | |||
| Half middleweight (−78 kg) | |||
| Middleweight (−86 kg) | |||
| Half heavyweight (−95 kg) | |||
| Heavyweight (+95 kg) | |||
| Openweight | |||
| Extra lightweight (−48 kg) | |||
| Half lightweight (−52 kg) | |||
| Lightweight (−56 kg) | |||
| Half middleweight (−61 kg) | |||
| Middleweight (−66 kg) | |||
| Half heavyweight (−72 kg) | |||
| Heavyweight (+72 kg) | |||
| Openweight | |||