IKO - International Karate Organization - 22nd All Japan Open Karate Championship (1990)
Open Kumite
| Rang | Catégorie | Champion | Pays |
| 1 | Open Kumite | Akira Masuda | Japan |
| 2 | Open Kumite | Kenji Midori | Japan |
| 3 | Open Kumite | Tatsuya Iwasaki | Japan |
| 4 | Open Kumite | Shinichi Sotodate | Japan |
| 5 | Open Kumite | Hiroyuki Miyake | Japan |
| 6 | Open Kumite | Takehiro Minami | Japan |
| 7 | Open Kumite | Takemori Uchiyama | Japan |
| 8 | Open Kumite | Kenji Yamaki | Japan |