| Event: | Men's 81 kg |
| Championship: | 2010 World Judo Championships |
| Location: | Tokyo, Japan |
| Gold: | Kim Jae-Bum |
| Gold Value: | 1 |
| Goldnoc: | KOR |
| Silver: | Leandro Guilheiro |
| Silvernoc: | BRA |
| Bronze: | Masahiro Takamatsu |
| Bronzenoc: | JPN |
| Bronze2: | Euan Burton |
| Bronzenoc2: | GBR |
The Men's -81 kg competition at the 2010 World Judo Championships was held at 10 September at the Yoyogi National Gymnasium in Tokyo, Japan. 79 competitors contested for the medals, being split in 4 Pools where the winner advanced to the medal round.