| Date | 2 August 2012 | |
|---|---|---|
| Status | Olympic | |
| Location | ExCeL, Newham, London (Hall 2) | |
| Participants | 30 from 30 countries | |
| Format | Losing quarter-finalists compete against losing semi-finalist for bronze. | |
The defending champion was Mongolian Naidanqiin Tüvshinbayar, who was back but was expected to be challenged by the 2011 World Champion, Russian Tagir Khaybulayev, while the top seed was Kazakh Maksim Rakov, but he went out in the first round. Khaybulayev had high-level support as Russian President Vladimir Putin, a judo enthusiast and practitioner, came to watch the matches on this day and root for Khaybulayev. In the semi-final, Khaybulayev met German Dimitri Peters and was expected to win easily, but there was no score in regulation or extra time and he advanced to the final only by hantei (judges’ decision). In the other half of the draw Naidan won his first few matches by ippon, until the semi-final when he defeated Hwang Hui-Tae (KOR) by yuko.
The final was not close. Tüvshinbayar had been injured in the semi-final and Khaybulayev had an easy time of it, winning with a shoulder drop for ippon at 2:14 into the match. This did make Tüvshinbayar the first Mongolian to win two Olympic medals. Peters won one of the bronze medals, while the other went to Dutch judoka Henk Grol, who had won a bronze at Beijing in this class and was World silver medalist in 2010.
| Date | 2 August 2012 — 9:30 |
|---|
| Date | 2 August 2012 — 10:33 |
|---|
| Match | Date/Time | Location | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|---|
| Match #1 | 02 Aug 10:33 | Hall 2 | Elmar Qasımov | AZE | Yuko | Levan Zhorzholiani | GEO | |
| Match #2 | 02 Aug 10:40 | Hall 2 | Hwang Hui-Tae | KOR | Ippon | Artem Bloshenko | UKR | |
| Match #3 | 02 Aug 10:47 | Hall 2 | Naidangiin Tüvshinbayar | MGL | Ippon | Thierry Fabre | FRA | |
| Match #4 | 02 Aug 10:54 | Hall 2 | Ramziddin Saidov | UZB | Ippon | Oreidis Despaigne | CUB | |
| Match #5 | 02 Aug 10:40 | Hall 2 | Henk Grol | NED | Waza-ari | Luciano Corrêa | BRA | |
| Match #6 | 02 Aug 10:47 | Hall 2 | Dimitri Peters | GER | Yuko | Jevgēņijs Borodavko | LAT | |
| Match #7 | 02 Aug 10:54 | Hall 2 | Lukáš Krpálek | CZE | Ippon | Takamasa Anai | JPN | |
| Match #8 | 02 Aug 11:01 | Hall 2 | Tagir Khaybulayev | RUS | Waza-ari | Yauhen Biadulin | BLR |
| Date | 2 August 2012 — 11:29 |
|---|
| Match | Date/Time | Location | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|---|
| Match #1 | 02 Aug 11:29 | Hall 2 | Hwang Hui-Tae | KOR | Yuko | Elmar Qasımov | AZE | |
| Match #2 | 02 Aug 11:36 | Hall 2 | Naidangiin Tüvshinbayar | MGL | Ippon | Ramziddin Saidov | UZB | |
| Match #3 | 02 Aug 11:36 | Hall 2 | Dimitri Peters | GER | Waza-ari | Henk Grol | NED | |
| Match #4 | 02 Aug 11:43 | Hall 2 | Tagir Khaybulayev | RUS | Ippon | Lukáš Krpálek | CZE |
| Date | 2 August 2012 — 14:28 |
|---|
| Match | Date/Time | Location | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|---|
| Match #1 | 02 Aug 14:28 | Hall 2 | Ramziddin Saidov | UZB | Ippon | Elmar Qasımov | AZE | |
| Match #2 | 02 Aug 14:35 | Hall 2 | Henk Grol | NED | Ippon | Lukáš Krpálek | CZE |
| Date | 2 August 2012 — 14:42 |
|---|
| Match | Date/Time | Location | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|---|
| Match #1 | 02 Aug 14:42 | Hall 2 | Naidangiin Tüvshinbayar | MGL | Yuko | Hwang Hui-Tae | KOR | |
| Match #2 | 02 Aug 14:49 | Hall 2 | Tagir Khaybulayev | RUS | Yusei-gachi | Dimitri Peters | GER |
| Date | 2 August 2012 — 15:10 |
|---|
| Match | Date/Time | Location | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|---|
| Match 3/5 | 02 Aug 15:10 | Hall 2 | Dimitri Peters | GER | Waza-ari-wasete ippon | Ramziddin Saidov | UZB | |
| Match 3/5 | 02 Aug 15:17 | Hall 2 | Henk Grol | NED | Waza-ari | Hwang Hui-Tae | KOR | |
| Match 1/2 | 02 Aug 16:10 | Hall 2 | Tagir Khaybulayev | RUS | Ippon | Naidangiin Tüvshinbayar | MGL |