1. Early Life and Junior Career
Ölziibayaryn Düürenbayar's journey in judo began early, leading to notable achievements in his junior years before his transition to senior competitions.
1.1. Birth and Background
Ölziibayaryn Düürenbayar was born on January 31, 1994, in Ulaanbaatar, Mongolia. He stands at 72 in (184 cm) and weighs 298 lb (135 kg). He is a member of the Mongolian military's judo club.
1.2. Junior Achievements
Düürenbayar quickly established himself as a promising talent in the junior circuit. He won gold medals at the Asian Junior Judo Championships in 2010, 2012, and 2013, competing in the +100 kg division. In 2010, he also participated in the World Junior Judo Championships, finishing in seventh place. He secured a silver medal at the 2013 World Junior Judo Championships held in Ljubljana, losing in the final of the +100 kg category. His junior career culminated with a gold medal at the 2014 World Junior Judo Championships in Fort Lauderdale. Additionally, he earned a bronze medal at the 2014 Asian Junior Judo Championships in Hong Kong.
2. Senior Career
Ölziibayaryn Düürenbayar's senior career saw him consistently compete at the highest levels of international judo, earning multiple medals at major championships and participating in the Olympic Games.
2.1. Early Senior Competitions
Düürenbayar made his mark early in his senior career by consistently medaling in the IJF Grand Prix and Grand Slam events. He won a bronze medal at the 2013 Judo Grand Prix Ulaanbaatar, followed by a silver at the 2014 Judo Grand Prix Qingdao, where he was defeated by Japan's Hisayoshi Harasawa in the final. He continued his strong performance with a bronze medal at the 2015 Judo Grand Prix Ulaanbaatar. In 2016, he claimed silver at the 2016 Judo Grand Prix Ulaanbaatar and a bronze at the 2016 Judo Grand Prix Qingdao. The year 2017 brought further success with a bronze medal at the 2017 Judo Grand Slam Paris and a silver at the 2017 Judo Grand Prix Hohhot. He also reached the seventh place at the World Masters competition in 2017, a year which saw him reach his highest world ranking of 2nd. In 2018, he again took silver at the 2018 Judo Grand Prix Hohhot, this time losing to his veteran compatriot Naidangiin Tüvshinbayar. He also secured a bronze medal at the 2019 Judo Grand Slam Düsseldorf.
2.2. Major Championships
Düürenbayar has been a consistent medalist at some of judo's most prestigious events. At the Asian Games, he earned two silver medals: in 2014 at Incheon, where he lost to Japan's Takeshi Ojitani in the +100 kg final, and again in 2018 at Jakarta, where he was defeated by South Korea's Kim Sung-min in the final. He also secured a bronze medal at the 2017 Asian Judo Championships in Hong Kong.
In 2016, Düürenbayar won a gold medal at the World Military Judo Championship held in Switzerland, demonstrating his strength within military sports competitions.
His most significant achievement came at the 2018 World Judo Championships in Baku. In a match observed by Mongolian President Khaltmaagiin Battulga, Düürenbayar defeated Rio 2016 Olympic silver medalist Hisayoshi Harasawa in the quarter-finals. Though he lost to Georgia's Guram Tushishvili in the semi-finals, he went on to win the bronze medal match against the Rio 2016 Olympic 100 kg gold medalist, Czech Republic's Lukáš Krpálek. In 2019, he also contributed to a team bronze medal at the Asian Pacific Judo Championships.

2.3. Olympic Participation
Ölziibayaryn Düürenbayar participated in the 2020 Summer Olympics held in Tokyo. He competed in the Men's +100 kg division, where he reached the Round of 32. He also represented Mongolia as part of the mixed team event, where the team finished in seventh place. He had the honor of being a flag bearer for Mongolia at the Tokyo 2020 opening ceremony, sharing the role with Onolbaataryn Khulan. He did not participate in the 2016 Summer Olympics in Rio de Janeiro because the experienced judoka Naidangiin Tüvshinbayar was selected to represent Mongolia in his weight class.
3. Competitive Record
The following table summarizes Ölziibayaryn Düürenbayar's major international career achievements in judo.
Year | Competition | Location | Event | Medal |
---|---|---|---|---|
2010 | Asian Junior Championships | Bangkok, Thailand | Men's +100 kg | Gold |
2010 | World Junior Championships | Agadir, Morocco | Men's +100 kg | 7th place |
2012 | Asian Junior Championships | Taipei, Taiwan | Men's +100 kg | Gold |
2013 | Grand Prix | Ulaanbaatar, Mongolia | Men's +100 kg | Bronze |
2013 | World Junior Championships | Ljubljana, Slovenia | Men's +100 kg | Silver |
2013 | Asian Junior Championships | Hainan, China | Men's +100 kg | Gold |
2014 | Asian Games | Incheon, South Korea | Men's +100 kg | Silver |
2014 | World Junior Championships | Fort Lauderdale, United States | Men's +100 kg | Gold |
2014 | Grand Prix | Qingdao, China | Men's +100 kg | Silver |
2014 | Asian Junior Championships | Hong Kong, China | Men's +100 kg | Bronze |
2015 | Grand Prix | Ulaanbaatar, Mongolia | Men's +100 kg | Bronze |
2016 | Grand Prix | Ulaanbaatar, Mongolia | Men's +100 kg | Silver |
2016 | Grand Prix | Qingdao, China | Men's +100 kg | Bronze |
2016 | World Military Championship | Switzerland | Men's +100 kg | Gold |
2017 | Grand Slam | Paris, France | Men's +100 kg | Bronze |
2017 | Asian Judo Championships | Hong Kong, China | Men's +100 kg | Bronze |
2017 | Grand Prix | Hohhot, China | Men's +100 kg | Silver |
2017 | World Masters | St. Petersburg, Russia | Men's +100 kg | 7th place |
2018 | Grand Prix | Hohhot, China | Men's +100 kg | Silver |
2018 | Asian Games | Jakarta, Indonesia | Men's +100 kg | Silver |
2018 | World Judo Championships | Baku, Azerbaijan | Men's +100 kg | Bronze |
2019 | Grand Slam | Düsseldorf, Germany | Men's +100 kg | Bronze |
2019 | Asian Pacific Judo Championships | Fujairah, United Arab Emirates | Mixed team | Bronze |
2020 | Summer Olympics | Tokyo, Japan | Men's +100 kg | Round of 32 |
2020 | Summer Olympics | Tokyo, Japan | Mixed team | 7th place |