IKO - International Karate Organization - 21st All Japan Weight Category Karate Tournament (2004)
Kumite Lightweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Lightweight | Yuuki Fukuii | Japan |
| 2 | Kumite Lightweight | Tomohiko Matsuoka | Japan |
| 3 | Kumite Lightweight | Makoto Ozaki | Japan |
| 4 | Kumite Lightweight | Yoshinori Nagano | Japan |
Kumite Middleweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Middleweight | Takamitsu Sakurai | Japan |
| 2 | Kumite Middleweight | Makoto Ikemoto | Japan |
| 3 | Kumite Middleweight | Adlan Abzotov | Russia |
| 4 | Kumite Middleweight | Yoshikazu Satoyama | Japan |
Kumite Heavyweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Heavyweight | Kenshin Morimura | Japan |
| 2 | Kumite Heavyweight | Yuji Kogure | Japan |
| 3 | Kumite Heavyweight | Masataka Ino | Japan |
| 4 | Kumite Heavyweight | Yoshitatsu Beppu | Japan |
Kumite Super Heavyweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Super Heavyweight | Jan Sokup | Czech Republic |
| 2 | Kumite Super Heavyweight | Andrey Stepin | Russia |
| 3 | Kumite Super Heavyweight | Oleg Lukyanenko | Russia |
| 4 | Kumite Super Heavyweight | Yoshiaki Uchida | Japan |