IKO - International Karate Organization - 28th All Japan Weight Category Karate Tournament (2011)
Kumite Lightweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Lightweight | Yuta Sawamura | Japan |
| 2 | Kumite Lightweight | Kazumasa Aizawa | Japan |
| 3 | Kumite Lightweight | Yuko Harada | Japan |
| 4 | Kumite Lightweight | Ichitaro Shishikura | Japan |
Kumite Middleweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Middleweight | Takuya Takeoka | Japan |
| 2 | Kumite Middleweight | Takaichi Onuma | Japan |
| 3 | Kumite Middleweight | Yuki Inaoka | Japan |
| 4 | Kumite Middleweight | Terutoshi Noshita | Japan |
Kumite Heavyweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Heavyweight | Kyohei Ajima | Japan |
| 2 | Kumite Heavyweight | Yoshikazu Muraoka | Japan |
| 3 | Kumite Heavyweight | Yoshitatsu Beppu | Japan |
| 4 | Kumite Heavyweight | Yuta Takahashi | Japan |
Kumite Super Heavyweight
| Rang | Catégorie | Champion | Pays |
| 1 | Kumite Super Heavyweight | Makoto Taniguchi | Japan |
| 2 | Kumite Super Heavyweight | Seijyun Kinoshita | Japan |
| 3 | Kumite Super Heavyweight | Norio Matsumura | Japan |
| 4 | Kumite Super Heavyweight | Masanori Tonooka | Japan |