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