IKO - International Karate Organization - 30th All Japan Open Karate Championship (1998)
Open Kumite
| Rang | Catégorie | Champion | Pays |
| 1 | Open Kumite | Hajime Kazumi | Japan |
| 2 | Open Kumite | Yoshihiro Tamura | Japan |
| 3 | Open Kumite | Hitoshi Kiyama | Japan |
| 4 | Open Kumite | Ryuta Noji | Japan |
| 5 | Open Kumite | Masayoshi Takaku | Japan |
| 6 | Open Kumite | Naoki Ichimura | Japan |
| 7 | Open Kumite | Atsushi Kadoi | Japan |
| 8 | Open Kumite | Yasuhiko Kimura | Japan |