IKO - International Karate Organization - 7th All Japan Weight Category Karate Tournament (1990)
Kumite Lightweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Lightweight | Kenji Midori | Japan |
| 2 | Kumite Lightweight | Kensaku Yamamoto | Japan |
| 3 | Kumite Lightweight | Ken Kato | Japan |
| 4 | Kumite Lightweight | Toru Sakata | Japan |
Kumite Middleweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Middleweight | Kyouichi Taguchi | Japan |
| 2 | Kumite Middleweight | Shinegori Sakamoto | Japan |
| 3 | Kumite Middleweight | Toshiya Sasaki | Japan |
| 4 | Kumite Middleweight | Toshiaki Iizumi | Japan |
Kumite Heavyweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Heavyweight | Tatsuya Iwasaki | Japan |
| 2 | Kumite Heavyweight | Iwao Takita | Japan |
| 3 | Kumite Heavyweight | Yoshiharu Eguchi | Japan |
| 4 | Kumite Heavyweight | Nobuaki Kakuta | Japan |