Jason Koster Judoka
Jason Koster
Country: New Zealand
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Born: 11 March 1983 (41 years)
Jason Koster won the Oceania Open in Wollongong in 2014. He is four times Oceania champion and collected various World Cup medals in Oceania as well as in South America. He captured a bronze medal at the Pan American Open in Lima in 2019. He is married to Moira Koster De Villiers having two children.
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Match balance per year
| Year | Matches | Won | Lost | % won |
|---|---|---|---|---|
| 2022 | 7 | 2 | 5 | 28.6% |
| 2021 | 4 | 1 | 3 | 25.0% |
| 2020 | 6 | 0 | 6 | 0.0% |
| 2019 | 14 | 4 | 10 | 28.6% |
| 2018 | 9 | 4 | 5 | 44.4% |
| 2016 | 11 | 4 | 7 | 36.4% |
| 2015 | 15 | 10 | 5 | 66.7% |
| 2014 | 11 | 8 | 3 | 72.7% |
| 2013 | 8 | 6 | 2 | 75.0% |
| 2012 | 10 | 3 | 7 | 30.0% |
| 2011 | 21 | 6 | 15 | 28.6% |
| 2010 | 8 | 4 | 4 | 50.0% |
| 2009 | 6 | 2 | 4 | 33.3% |
| 2008 | 7 | 5 | 2 | 71.4% |
| Total | 137 | 59 | 78 | 43.1% |
Head-to-heads
| Date | Opponent | Noc | Rnd | W/L | Type | Event | Cat | video |
|---|---|---|---|---|---|---|---|---|
| 3 Aug 2022 | Ozcicek-Takagi, Kayhan | AUS | 5/7 | L | CWG | Birmingham | U100 | |
| 3 Aug 2022 | Reyes, Kyle | CAN | 1/4 | L | CWG | Birmingham | U100 | |
| 3 Aug 2022 | Khan, Qaisar | PAK | 1/8 | W | CWG | Birmingham | U100 | |
| 17 Jul 2022 | Shagatayev, Bekzat | KAZ | 5/7 | L | ECup | Winterthur | U100 | |
| 17 Jul 2022 | Ryder, Ian | CAN | 1/4 | L | ECup | Winterthur | U100 | |
| 17 Jul 2022 | Vanderbroeck, Lars | NED | 1/8 | W | ECup | Winterthur | U100 | |
| 16 Apr 2022 | Romo, Rafael | CHI | 1/8 | L | PanCH | Lima | U100 | |
| 11 Jun 2021 | Adamian, Arman | RUS | 1/16 | L | WCh | Budapest | U100 | |
| 11 Jun 2021 | Irungu, Joseph | KEN | 1/32 | W | WCh | Budapest | U100 | |
| 3 Apr 2021 | Kukolj, Aleksandar | SRB | 1/32 | L | GSL | Antalya | U100 | |
| 28 Mar 2021 | Saneblidze, Onise | GEO | 1/32 | L | GSL | Tbilisi | U100 | |
| 1 Mar 2020 | Jimenez, Pedro | ESP | 1/8 | L | WCup | Warsaw | U100 | |
| 23 Feb 2020 | Reyes, Kyle | CAN | 1/32 | L | GSL | Düsseldorf | U100 | |
| 16 Feb 2020 | Pozzi, Davide | ITA | 1/8 | L | WCup | Oberwart | U100 | |
| 9 Feb 2020 | Maret, Cyrille | FRA | 1/16 | L | GSL | Paris | U100 | |
| 2 Feb 2020 | Kadyrov, Kadyr | AZE | 1/8 | L | WCup | Sofia | U100 | |
| 25 Jan 2020 | Frey, Karl-Richard | GER | 1/16 | L | GP | Tel Aviv | U100 | |
| 4 Nov 2019 | Ohat, Zalan | HUN | 1/8 | L | WCup | Perth | U100 | |
| 30 Aug 2019 | ElNahas, Shady | CAN | 1/32 | L | WCh | Tokyo | U100 | |
| 4 Aug 2019 | Lu, Guan Zhi | TPE | 3/5 | L | WCup | Taipei | U100 | |
| 4 Aug 2019 | Nguyen Hoang, Duong | VIE | 5/7 | W | WCup | Taipei | U100 | |
| 4 Aug 2019 | Lee, Dongyun | KOR | 1/4 | L | WCup | Taipei | U100 | |
| 22 Apr 2019 | Lu, Guan Zhi | TPE | 1/16 | L | ACh | Fujairah | U100 | |
| 24 Mar 2019 | Briceno, Thomas | CHI | 3/5 | L | WCup | Santiago | U100 | |
| 24 Mar 2019 | Keeve, Nate | USA | 1/2 | L | WCup | Santiago | U100 | |
| 24 Mar 2019 | Arroyo Osorno, Jose Luis | PER | 1/4 | W | WCup | Santiago | U100 | |
| 17 Mar 2019 | Aprahamian, Pablo | URU | 5/7 | L | WCup | Cordoba | U100 | |
| 17 Mar 2019 | Keeve, Nate | USA | 1/4 | L | WCup | Cordoba | U100 | |
| 10 Mar 2019 | Angulo, Junior | ECU | 3/5 | W | WCup | Lima | U100 | |
| 10 Mar 2019 | Arroyo Osorno, Jose Luis | PER | 1/2 | L | WCup | Lima | U100 | |
| 10 Mar 2019 | Guerault, Michael | CAN | 1/4 | W | WCup | Lima | U100 | |
| 18 Nov 2018 | Womersley, Alex | AUS | final | W | WCup | Perth | U100 | |
| 18 Nov 2018 | Hollingbery, Timothy | AUS | poule | W | WCup | Perth | U100 | |
| 25 Sep 2018 | Reyes, Kyle | CAN | 1/32 | L | WCh | Baku | U100 | |
| 7 Apr 2018 | Iosua, Vakalahi | poule | W | OC | Noumea | U100 | ||
| 7 Apr 2018 | Takayawa, Tevita | FIJ | poule | L | OC | Noumea | U100 | |
| 7 Apr 2018 | Berard, Nicolas | AUS | 3/4 | W | OC | Noumea | U100 | |
| 18 Feb 2018 | Kozybayev, Adilkhan | KAZ | 1/16 | L | WCup | Oberwart | U100 | |
| 11 Feb 2018 | Pacek, Martin | SWE | 1/16 | L | GSL | Paris | U100 | |
| 4 Feb 2018 | Dosen, Bojan | SRB | 1/8 | L | WCup | Sofia | U100 | |
| 15 May 2016 | Mahjoub, Javad | ROT | 1/8 | L | GP | Almaty | U100 | |
| 15 May 2016 | Tadehara, Ajax | USA | 1/16 | W | GP | Almaty | U100 | |
| 8 May 2016 | Frey, Karl-Richard | GER | 1/16 | L | GSL | Baku | U100 | |
| 8 Apr 2016 | Takayawa, Tevita | FIJ | poule | W | OC | Canberra | U100 | |
| 8 Apr 2016 | Didier, Duke | AUS | poule | L | OC | Canberra | U100 | |
| 13 Mar 2016 | Buzacarini, Rafael | BRA | 3/5 | L | WCup | Buenos Aires | U100 | |
| 13 Mar 2016 | Minaskin, Grigori | EST | 1/2 | L | WCup | Buenos Aires | U100 | |
| 13 Mar 2016 | Baccino, Orlando | ARG | 1/4 | W | WCup | Buenos Aires | U100 | |
| 6 Mar 2016 | Corrêa, Luciano | BRA | 3/5 | L | WCup | Lima | U100 | |
| 6 Mar 2016 | Tadehara, Ajax | USA | 5/7 | W | WCup | Lima | U100 | |
| 6 Mar 2016 | Gviniashvili, Beka | GEO | 1/4 | L | WCup | Lima | U100 | |
| 14 Nov 2015 | Schuurmans, Elijah | AUS | 1/8 | L | WCup | Wollongong | U100 | |
| 29 Aug 2015 | Rakov, Maxim | KAZ | 1/32 | L | WCh | Astana | U100 | |
| 11 Apr 2015 | Didier, Duke | AUS | poule | W | OC | Nouvelle | U100 | |
| 11 Apr 2015 | Schuurmans, Elijah | AUS | poule | W | OC | Nouvelle | U100 | |
| 22 Mar 2015 | Corrêa, Luciano | BRA | final | L | WCup | Buenos Aires | U100 | |
| 22 Mar 2015 | Deschenes, Marc | CAN | 1/2 | W | WCup | Buenos Aires | U100 | |
| 22 Mar 2015 | San Martin, Alejandro | ESP | 1/4 | W | WCup | Buenos Aires | U100 | |
| 22 Mar 2015 | Buechel, David | LIE | 1/8 | W | WCup | Buenos Aires | U100 | |
| 15 Mar 2015 | Garcia, Sergio | MEX | 3/5 | W | WCup | Montevideo | U100 | |
| 15 Mar 2015 | Corrêa, Luciano | BRA | 1/2 | L | WCup | Montevideo | U100 | |
| 15 Mar 2015 | Tadehara, Ajax | USA | 1/4 | W | WCup | Montevideo | U100 | |
| 15 Mar 2015 | Baccino, Orlando | ARG | 1/8 | W | WCup | Montevideo | U100 | |
| 8 Mar 2015 | Bueno, Manuel | URU | 3/5 | W | WCup | Santiago | U100 | |
| 8 Mar 2015 | Buzacarini, Rafael | BRA | 1/2 | L | WCup | Santiago | U100 | |
| 8 Mar 2015 | Deschenes, Marc | CAN | 1/4 | W | WCup | Santiago | U100 | |
| 15 Nov 2014 | Didier, Duke | AUS | final | W | WCup | Wollongong | U100 | |
| 15 Nov 2014 | Schuurmans, Elijah | AUS | 1/2 | W | WCup | Wollongong | U100 | |
| 26 Jul 2014 | Didier, Duke | AUS | 3/5 | W | CWG | Glasgow | U100 | |
| 26 Jul 2014 | Burton, Euan | GBR | 1/2 | L | CWG | Glasgow | U100 | |
| 26 Jul 2014 | Pathania, Sahil | IND | 1/4 | W | CWG | Glasgow | U100 | |
| 13 Jul 2014 | Ardizio, Luca | ITA | 5/7 | L | ECup | Sindelfingen | U100 | |
| 13 Jul 2014 | Kronberger, Christoph | AUT | 1/4 | L | ECup | Sindelfingen | U100 | |
| 13 Jul 2014 | Gerzer, Dominik | GER | 1/8 | W | ECup | Sindelfingen | U100 | |
| 13 Jul 2014 | Saginadze, Archil | GEO | 1/16 | W | ECup | Sindelfingen | U100 | |
| 27 Apr 2014 | Slyfield, Timothy | NZL | final | W | OC | Auckland | U100 | |
| 27 Apr 2014 | Desfour, Romain | PYF | 1/2 | W | OC | Auckland | U100 | |
| 16 Nov 2013 | Slyfield, Timothy | NZL | final | W | WCup | Apia | U100 | |
| 16 Nov 2013 | Tadehara, Ajax | USA | poule | W | WCup | Apia | U100 | |
| 16 Nov 2013 | Schuurmans, Elijah | AUS | poule | W | WCup | Apia | U100 | |
| 1 Sep 2013 | Shichinohe, Ryu | JPN | 1/8 | L | WTC | Rio de Janeiro | O90 | |
| 31 Aug 2013 | Sayidov, Ramziddin | UZB | 1/16 | L | WCh | Rio de Janeiro | U100 | |
| 31 Aug 2013 | Merlin, Jose | ECU | 1/32 | W | WCh | Rio de Janeiro | U100 | |
| 14 Apr 2013 | Slyfield, Timothy | NZL | final | W | OC | Apia | U100 | |
| 14 Apr 2013 | Poiveka, Jean-Luc | NCL | 1/2 | W | OC | Apia | U100 | |
| 16 Nov 2012 | Slyfield, Timothy | NZL | final | L | WCup | Apia | U100 | |
| 16 Nov 2012 | Dahl, Josh | AUS | 1/2 | W | WCup | Apia | U100 | |
| 16 Nov 2012 | Schuurmans, Elijah | AUS | 1/4 | W | WCup | Apia | U100 | |
| 29 Apr 2012 | Kelly, Daniel | AUS | final | L | OC | Cairns | U100 | |
| 29 Apr 2012 | Broadhead, Ben | AUS | 1/2 | W | OC | Cairns | U100 | |
| 26 Feb 2012 | Pacek, Martin | SWE | 1/32 | L | WCup | Prague | U100 | |
| 19 Feb 2012 | Rakov, Maxim | KAZ | 1/16 | L | GP | Düsseldorf | U100 | |
| 12 Feb 2012 | Fikri, Adil | MAR | 1/32 | L | WCup | Oberwart | U100 | |
| 5 Feb 2012 | Corrêa, Luciano | BRA | 1/16 | L | GSL | Paris | U100 | |
| 29 Jan 2012 | Arakelyan, Hakob | ARM | 1/8 | L | WCup | Tbilisi | U100 | |
| 12 Nov 2011 | Vashkulat, Kyle | USA | 3/5 | L | WCup | Apia | U100 | |
| 12 Nov 2011 | Higashi, Shintaro | USA | 5/7 | W | WCup | Apia | U100 | |
| 12 Nov 2011 | Bloshenko, Artem | UKR | 1/4 | L | WCup | Apia | U100 | |
| 12 Nov 2011 | Tadehara, Ajax | USA | 1/8 | W | WCup | Apia | U100 | |
| 9 Oct 2011 | Luchyn, Dmytro | UKR | 5/7 | L | WCup | Baku | U100 | |
| 9 Oct 2011 | Zhorzholiani, Levan | GEO | 1/4 | L | WCup | Baku | U100 | |
| 9 Oct 2011 | Minaskin, Grigori | EST | 1/8 | W | WCup | Baku | U100 | |
| 9 Oct 2011 | Aouidate, Sidé | FRA | 1/8 | W | WCup | Baku | U100 | |
| 2 Oct 2011 | Resko, Viktors | LAT | 1/8 | L | WCup | Liverpool | U100 | |
| 27 Aug 2011 | Zeevi, Ariel | ISR | 1/32 | L | WCh | Paris | U100 | |
| 12 Jun 2011 | Tomchuk, Andrey | RUS | 1/8 | L | WCup | Tallinn | U100 | |
| 5 Jun 2011 | Mekic, Amel | BIH | 5/7 | L | WCup | Bucharest | U100 | |
| 5 Jun 2011 | Leite, Leonardo | BRA | 1/4 | L | WCup | Bucharest | U100 | |
| 5 Jun 2011 | Abdel Raof, Mohamed | EGY | 1/8 | W | WCup | Bucharest | U100 | |
| 29 May 2011 | Denysov, Vyacheslav | UKR | 1/16 | L | GSL | Moscow | U100 | |
| 17 Apr 2011 | Kelly, Daniel | AUS | final | L | OC | Papeete | U100 | |
| 17 Apr 2011 | Didier, Duke | AUS | 1/2 | W | OC | Papeete | U100 | |
| 20 Feb 2011 | Battulga, Temuulen | MGL | 1/16 | L | GP | Düsseldorf | U100 | |
| 13 Feb 2011 | Sasson, Or | ISR | 1/32 | L | WCup | Budapest | U100 | |
| 6 Feb 2011 | Farkas, Bálint István | HUN | 1/32 | L | GSL | Paris | U100 | |
| 30 Jan 2011 | Mammadov, Sain | AZE | 1/8 | L | WCup | Tbilisi | U100 | |
| 13 Nov 2010 | Kelly, Daniel | AUS | final | L | WCup | Apia | U100 | |
| 13 Nov 2010 | Didier, Duke | AUS | 1/2 | W | WCup | Apia | U100 | |
| 13 Nov 2010 | Mataeliga, Paselio | SAM | 1/4 | W | WCup | Apia | U100 | |
| 13 Sep 2010 | Shah, Hussain Shah | PAK | 1/32 | L | WCh | Tokyo | OpenM | |
| 9 Sep 2010 | Grol, Henk | NED | 1/16 | L | WCh | Tokyo | U100 | |
| 9 Sep 2010 | Yahata, Kenji | PHI | 1/32 | W | WCh | Tokyo | U100 | |
| 15 Aug 2010 | Kelly, Daniel | AUS | final | L | OC | Canberra | U100 | |
| 15 Aug 2010 | Dahl, Josh | AUS | 1/2 | W | OC | Canberra | U100 | |
| 14 Nov 2009 | Didier, Duke | AUS | 3/5 | W | WCup | Apia | U100 | |
| 14 Nov 2009 | Leite, Leonardo | BRA | 1/2 | L | WCup | Apia | U100 | |
| 14 Nov 2009 | Taylor, Alex | AUS | 1/4 | W | WCup | Apia | U100 | |
| 12 Jul 2009 | Higashi, Shintaro | USA | 5/7 | L | WCup | Belo Horizonte | U100 | |
| 12 Jul 2009 | Leite, Leonardo | BRA | 1/4 | L | WCup | Belo Horizonte | U100 | |
| 5 Jul 2009 | Corrêa, Luciano | BRA | 1/8 | L | GSL | Rio de Janeiro | U100 | |
| 5 Oct 2008 | Kurbanov, Utkir | UZB | 1/4 | L | WTC | Tokyo | U100 | |
| 21 Mar 2008 | Picard, Jérémy | PYF | final | W | OC | Christchurch | OpenM | |
| 21 Mar 2008 | Pragnell, Andrew | NZL | 3/5 | W | OC | Christchurch | U100 | |
| 21 Mar 2008 | Gouriou, Teva | NCL | 1/2 | W | OC | Christchurch | OpenM | |
| 21 Mar 2008 | Celotti, Matthew | AUS | 1/4 | L | OC | Christchurch | U100 | |
| 21 Mar 2008 | Davio, Rehia | PYF | 1/4 | W | OC | Christchurch | OpenM | |
| 21 Mar 2008 | Fogagnolo, Priscus | AUS | 1/8 | W | OC | Christchurch | OpenM | |
