IKO - International Karate Organization - 17th All Japan Weight Category Karate Tournament (2000)
Kumite Lightweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Lightweight | Masafumi Tagahara | Japan |
| 2 | Kumite Lightweight | Makoto Ozaki | Japan |
| 3 | Kumite Lightweight | Hisashi Noki | Japan |
| 4 | Kumite Lightweight | Shiro Yaginuma | Japan |
Kumite Middleweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Middleweight | Hiroyuki Kidachi | Japan |
| 2 | Kumite Middleweight | Khosro Yaghoubi | Iran |
| 3 | Kumite Middleweight | Yoshinori Ikeda | Japan |
| 4 | Kumite Middleweight | Toshihiro Kanamori | Japan |
Kumite Heavyweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Heavyweight | Kentaro Tanaka | Japan |
| 2 | Kumite Heavyweight | Osamu Sumitani | Japan |
| 3 | Kumite Heavyweight | Tetsuya Kano | Japan |
| 4 | Kumite Heavyweight | Naoji Mikoshiba | Japan |
Kumite Super Heavyweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Super Heavyweight | Hirokazu Kondo | Japan |
| 2 | Kumite Super Heavyweight | Hideki Tokumoto | Japan |
| 3 | Kumite Super Heavyweight | Satoshi Higuchi | Japan |
| 4 | Kumite Super Heavyweight | Masaya Ichikawa | Japan |